WO2009026197A1 - Novel cathepsin c inhibitors and their use - Google Patents

Novel cathepsin c inhibitors and their use Download PDF

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Publication number
WO2009026197A1
WO2009026197A1 PCT/US2008/073425 US2008073425W WO2009026197A1 WO 2009026197 A1 WO2009026197 A1 WO 2009026197A1 US 2008073425 W US2008073425 W US 2008073425W WO 2009026197 A1 WO2009026197 A1 WO 2009026197A1
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methyl
pyrrolidinyl
cyano
amino
benzenesulfonamide
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PCT/US2008/073425
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French (fr)
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Jianghe Deng
Dramane Ibrahim Laine
Michael R. Palovich
Haibo Xie
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Glaxo Group Limited
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    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D207/04—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
    • C07D207/10—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D207/14—Nitrogen atoms not forming part of a nitro radical
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P11/00—Drugs for disorders of the respiratory system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P11/00—Drugs for disorders of the respiratory system
    • A61P11/08—Bronchodilators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
    • C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
    • C07D403/06—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
    • C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
    • C07D403/12—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
    • C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
    • C07D409/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
    • C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
    • C07D417/12—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings linked by a chain containing hetero atoms as chain links

Definitions

  • R24 is monocyclic heteroaryl; wherein said R24 is optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF 3 , CN, NO 2 , Rc, -ORa, - OCF 3 , -C(O)Rb, -C(O)ORa, -C(O)NRaRa, -OC(O)Rb, -OC(O)NRaRa, -NRaRa, - NRaC(O)Rb, -NRaC(O)ORa, -NRaC(O)NRaRa;
  • Suitable pharmaceutically-acceptable excipients include the following types of excipients: Diluents, fillers, binders, disintegrants, lubricants, glidants, granulating agents, coating agents, wetting agents, solvents, co-solvents, suspending agents, emulsifiers, sweetners, flavoring agents, flavor masking agents, coloring agents, anticaking agents, hemectants, chelating agents, plasticizers, viscosity increasing agents, antioxidants, preservatives, stabilizers, surfactants, and buffering agents.
  • excipients include the following types of excipients: Diluents, fillers, binders, disintegrants, lubricants, glidants, granulating agents, coating agents, wetting agents, solvents, co-solvents, suspending agents, emulsifiers, sweetners, flavoring agents, flavor masking agents, coloring agents, anticaking agents, hemectants, chelating agents
  • Scheme 5 represents a general reaction scheme for preparing compounds according to Formula I wherein R3 is a functional group as defined other than H.
  • R2a, R2b, R2c, R1 and n are as defined above unless otherwise defined.
  • a suitably protected intermediate 24 which can prepared following procedures analogous to those depicted in Schemes 1-4, can be treated with an alkylating reagent R3X in the presence of a base such as NaH to give the N-alkylated derivative 25.
  • R3X alkylating reagent
  • Subsequent removal of the BOC protecting group of 25 with an acid reagent such as 4N HCI in dioxane followed by treatment with cyanogen bromide results in the formation of the desired compounds 26.
  • Scheme 6 represents another general reaction scheme for preparing compounds according to Formula I wherein R3 is H.
  • R2a, R2b, R2c, R1 and n are as defined above unless otherwise defined.
  • a suitable BOC-protected amino-acid 27 is transformed to the corresponding alkene derivative 28 by first conversion to the corresponding Weinreb amide, followed by reduction with LiAIH 4 and subsequent Wittig reaction with tri-phenyl phosphonium bromide in the presence of a strong base following procedures well known to those skilled in the art.
  • Treatment of 28 with allyl bromide in the presence of a base such as NaH leads to the formation of the disubtituted derivative 29.

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  • Pain & Pain Management (AREA)
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  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Pyrrole Compounds (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
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Abstract

The invention is directed to compounds according to Formula (I) wherein R1, R2a, R2b, R2c, R3, and n are defined below, and to pharmaceutically-acceptable salts thereof. They are cathepsin C inhibitors and can be used in the treatment of diseases mediated by the cathepsin C enzyme, such as COPD.

Description

NOVEL CATHEPSIN C INHIBITORS AND THEIR USE
FIELD OF THE INVENTION
The invention is directed to novel cathepsin C inhibitors and their use in the treatment of diseases mediated by the cathepsin C enzyme.
BACKGROUND OF THE INVENTION
Cathepsins are a family of enzymes included in the papain superfamily of cysteine proteases. Cathepsins B, C, F, H, K, L, O, S, V, W, and X have been described in the scientific literature. Cathepsin C is also known in the literature as Dipeptidyl Peptidase I or "DPPI."
A number of published studies have begun to describe the role cathepsin C plays in certain inflammatory processes. See E.g. Methot et al., The Journal of Biological Chemistry, 282 (29): 20836-46 (2007); Pagano et al., Proc Natl Acad Sci USA 104 (8): 2855-60 (2007); Xuchu Que et al., The Journal of Bioogical. Chemistry, 282 (7): 4994- 5003 (2007); Adkison et al., The Journal of Clinical Investigation 109: 363-371 (2002); Tran et al., Archives of Biochemistry and Biophysics 403: 160-170 (2002); Thiele et al., The Journal of Immunology 158: 5200-5210 (1997); Bidere et al., The Journal of Biological Chemistry 277: 32339-32347 (2002); Mabee et al., The Journal of Immunology 160: 5880- 5885; McGuire et al., The Journal of Biological Chemistry, 268: 2458-2467; and Paris et al., FEBS Letters 369: 326-330 (1995). From these studies, it appears that cathepsin C is co-expressed with certain serine proteases, which are released from inflammatory cells recruited to sites of inflammation, and acts as a physiological activator of these proteases. Once activated, these proteases are capable of degrading various extracellular matrix components, which can lead to tissue damage and chronic inflammation.
For example, Chronic Obstructive Pulmonary Disease ("COPD") is a chronic inflammatory disease where cathepsin C is believed to play a role. The American Thoracic Society defines COPD as "a disease characterized by the presence of airflow obstruction due to chronic bronchitis or emphysema; the airflow obstruction is generally progressive, may be accompanied by airway hyperreactivity, and may be partially reversible." American Journal of Respiratory and Critical Care Medicine 152: S77-S120 (1995). Chronic bronchitis is generally characterized by a chronic productive cough, whereas emphysema is generally characterized by permanent enlargement of the airspaces distal to the terminal bronchioles and airway wall destruction. Chronic bronchitis and emphysema usually occur together in COPD patients. Cigarette smoking is a significant risk factor for developing COPD. Exposure to cigarette smoke and/or other noxious particles and gases may result in chronic inflammation of the lung. In response to such exposure, inflammatory cells such as CD8+ Tcells, macrophages, and neutrophils are recruited to the area. These recruited inflammatory cells release proteases, which are believed to play a major role in the disease etiology by degrading airway walls. Proteases believed to be involved in this process include the serine proteases neutrophil elastase ("NE"), chymase ("CY"), cathepsin G, proteinase 3 and granzymes A and B. Cathepsin C appears to be involved in activating these enzymes. Rheumatoid arthritis ("RA") is another chronic inflammatory disease where cathepsin C is believed to play a role. Arthritis and Rheumatism. 52: 2553-8 (2005). Neutrophils are recruited to the site of joint inflammation and release cathepsin G, NE, and proteinase 3, which are believd to be responsible for cartilage destruction associated with RA. Cathepsin C appears also to be involved in activating these enzymes. Other conditions where cathepsin C is believed to play a role include abdominal or thoracic aortic aneurism, adult respiratory distress syndrome, acute lung injury, osteoarthritis, asthma, multiple sclerosis, sepsis, and toxoplasmosis. See E.g. Moraes, T. J., Chow, C-W., Downey, G. P. Proteases and lung injury Critical Care Medicine 31 (suppl.): S189-S194 (2003); Okayama N., Kakihana Y., Setoguchi D., Matsui K. Yuyama N. Akaiwa M. Yoshida NL. Maeda M. Sugita Y. Izuhara K., Identification of an alternative splicing variant of cathepsin C/dipeptidyl-peptidase I, Gene 293 (1-2): 1-7 (2002); Wolters PJ. Laig-Webster M. Caughey GH., Dipeptidyl peptidase I cleaves matrix-associated proteins and is expressed mainly by mast cells in normal dog airways, American Journal of Respiratory Cell & Molecular Biology 22 (2): 183-90 (2000); Mallen-St Clair J. Pham CT. Villalta SA. Caughey GH. Wolters PJ., Mast cell dipeptidyl peptidase I mediates survival from sepsis, Journal of Clinical Investigation 1 13: 628-34 (2004); Xuchu Que, Juan C. Engel, David Ferguson, Annette Wunderlich, Stanislas Tomavo, and Sharon L. Reed, Cathepsin Cs Are Key for the Intracellular Survival of the Protazoan Parasite, Toxoplasma gondii, The Journal of Biological Chemistry, 282 (7): 4994-5003 (2007). One approach to treating these conditions is to inhibit the activity of the serine proteases involved in the inflammatory process, especially NE activity. See E.g., Ohbayashi, "Neutrophil elastase inhibitors as treatment for COPD", Expert Opin. Investig. Drugs 1 1 (7): 965-980 (2002); Shapiro, "Neutrophil Elastase: Path Clearer, Pathogen Killer, or Just Pathologic?", Am. J. Respir. Cell MoI. Biol. 26: 266-268 (2002); lmabayashi T., Omae T., Matsunaga A., Kanmura Y., Clinical effects of a neutrophil elastase inhibitor, sivelestat, in patients with acute respiratory distress syndrome Journal of Anesthesia 20: 6-10 (2006). In light of the role cathepsin C plays in activating certain serine proteases, especially NE, it is desirable to prepare compounds that inhibit its activity, which thereby inhibit serine protease activity. Thus, there is a need to identify compounds that inhibit cathepsin C, which can be used in the treatment of a variety of conditions mediated by the cathepsin C enzyme.
SUMMARY OF THE INVENTION
This invention related to compounds of Formula I:
Figure imgf000004_0001
Formula I wherein: each R1 is independently selected from the group consisting of: halo, C1-C4 alkyl, CF3, CN, NO2, -ORa, -OCF3, -C(O)NHRa, -C(O)ORa, -NRaRa, -NHC(O)Ra, or - NHC(O)NHRa; n is an integer from O to 4;
R2a is H, halo, -C(O)Rx, -C(O)ORy, -C(O)NRaRy, -OC(O)Rx, -OC(O)NRaRy, - NRaRy, -NRaC(O)Rx, NRaC(O)R22, -NRaC(O)ORy, -NRaC(O)NRaRy, R20, R21 , R22, R23, R24, -OH, -OR20, -0R21 , -OR22, -OR23, or -OR24; -CN
R2b is H or C1-C4 alkyl; or R2a and R2b taken together with the carbon atom to which they are attached form a C3-C7 cycloalkyl group; R2c is H or C1-C4 alkyl; R20 is C1-C4 alkyl; wherein said R20 is optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF3, CN, NO2, R21 , R22, R23, R24, -ORy, -C(O)Rx, -C(O)ORy, -C(O)NRaRy, -OC(O)Rx, -OC(O)NRaRy, -NRaRy, - NRaC(O)Rx, -NRaC(O)ORy, -NRaC(O)NRaRy; R21 is C3-C6 cycloalkyl; wherein said R21 is optionally substituted with one or more substituents independently selected from the group consisting of: CF3, Rc, -ORa, -OCF3, and -NRaRa; R22 is heterocycloalkyl; wherein said R22 is optionally substituted with one or more substituents independently selected from the group consisting of: CF3, Rc, -ORa, -OCF3, and -NRaRa;
R23 is phenyl; wherein said R23 is optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF3, CN, NO2, Rc, -ORa, - OCF3, -C(O)Rb, -C(O)ORa, -C(O)NRaRa, -OC(O)Rb, -OC(O)NRaRa, -NRaRa, - NRaC(O)Rb, -NRaC(O)ORa, -NRaC(O)NRaRa;
R24 is monocyclic heteroaryl; wherein said R24 is optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF3, CN, NO2, Rc, -ORa, - OCF3, -C(O)Rb, -C(O)ORa, -C(O)NRaRa, -OC(O)Rb, -OC(O)NRaRa, -NRaRa, - NRaC(O)Rb, -NRaC(O)ORa, -NRaC(O)NRaRa;
R3 is H, R30, or R31 ; R30 is C1-C4 alkyl, C2-C4 alkenyl, or C2-C4 alkynyl; wherein said R30 is optionally substituted with one or more substituents independently selected from the group consisting of: CF3, Re, Rf, Rg, CN, -ORa, -OCF3, - ORf, -ORg, -0R31 , and -NRaRa;
R31 is C3-C6 cycloalkyl; wherein said R31 is optionally substituted with one or more substituents independently selected from the group consisting of: Rb, -ORa, -OCF3, and -NRaRa; each Ra is independently H or C1-C4 alkyl; each Rb is independently C1-C4 alkyl; each Rc is independently C1-C4 alkyl; wherein said C1-C4 alkyl is optionally substituted with one or more substituents independently selected from the group consisting of: CF3, -ORa, OCF3, and -NRaRa; each Rd is independently C1-C4 alkyl; wherein said C1-C4 alkyl is optionally substituted with one or more substituents independently selected from the group consisting of: CF3, -ORa, OCF3, -NRaRa, Re, and Rf; each Re is independently phenyl or heteroaryl optionally substituted with one or more substituents independently selected from the group consisting of: halo, NO2, CF3, Rb, R23, R24, -ORa, OCF3, and -NRaRa; each Rf is independently monocyclic heteroaryl optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF3, Rb, R23, R24, -ORa, OCF3, and -NRaRa; each Rg is independently napthyl optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF3, Rb, -ORa, OCF3, and -NRaRa; each Rh is independently C3-C6 cycloalkyl optionally substituted with one or more substituents independently selected from the group consisting of: Rb, -ORa, -OCF3, and - NRaRa; each Rx is Rd, Re, Rf, Rg, or Rh; and each Ry is H, Rd, Re, Rf, Rg, or Rh; or a salt thereof. The compounds of the invention are cathepsin C inhibitors and can be used in the treatment of diseases mediated by the cathepsin C enzyme, such as COPD. Accordingly, the invention is further directed to pharmaceutical compositions comprising a compound of the invention, or pharmaceutically acceptable salt of it. The invention is still further directed to methods of inhibiting cathepsin C and treatment of conditions associated therewith using a compound of the invention or a pharmaceutical composition comprising a compound of the invention, or a pharmaceutically acceptable salt it.
DETAILED DESCRIPTION OF THE INVENTION
In describing the invention, chemical elements are identified in accordance with the Periodic Table of the Elements. Abbreviations and symbols utilized herein are in accordance with the common usage of such abbreviations and symbols by those skilled in the chemical and biological arts. For example, the following abbreviations are used herein:
"aq" is an abbreviation for aqueous "AcCN" is an abbreviation for acetonitrile
"BOC" or "boc" is an abbreviation for terf-butyloxycarbonyl "0C" is an abbreviation for degrees Celsius "Cbz" is an abbreviation for carbobenzyloxy "CDI" is an abbreviation for carbodiimidazole "DCIWCH2CI2" is an abbreviation for dichloromethane
"DEAD" is an abbreviation for diethylazodicarboxylate "DMAP" is an abbreviation for dimethylaminopyridine "DIPEA" or "DIEA" is an abbreviation for di-isopropylethylamine "DMF" is an abbreviation for dimethylformamide "DPPA" is an abbreviation for diphenylphosporyl azide
"EA" or "EtAc"is an abbreviation for ethyl acetate "ESI" is an abbreviation for electrospray ionization
"eq" is an abbreviation for equivalent
"HPLC" is an abbreviation for High Pressure Liquid Chromatography
"g" is an abbreviation for grams "h" or "hr" is an abbreviation for hour
"L" is an abbreviation for liters
"LC-MS" or "LC/MS" is an abbreviation for Liquid chromatography-Mass spectrometry
"Me" is an abbreviation for methyl "Ms" is an abbreviation for methanesulfonyl
"mL" is an abbreviation for milliliters
"min" is an abbreviation for minute or minutes
"mmol" is an abbreviation for millimole or millimolar
"N" is an abbreviation for Normal and refers to the number of equivalents of reagent per liter of solution
"PE" is an abbreviation for petroleum ether
"Ph" is an abbreviation for phenyl
"PS" is an abbreviation for polymer-supported
"sat" is an abbreviation for saturated "Si" is an abbreviation for silica
"SPE" is an abbreviation for solid phase extraction
"TBAF" is an abbreviation for tetra-butylammonium fluroride
"TBS" is an abbreviation for t-butyldimethyl silyl
"TBS-CI" is an abbreviation for t-butyldimethyl silyl chloride "TBTU" is an abbreviation for O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate
"TEA" is an abbreviation for triethylamine
"TEMPO" is an abbreviation for 2,2,6,6,-tetramethylpiperidine 1-oxyl
"TFA" is an abbreviation for trifluoroacetic acid "THF" is an abbreviation for tetrahydrofuran
"UV" is an abbreviation for ultraviolet.
"Alkyl" refers to a saturated hydrocarbon chain having the specified number of carbons. For example, C1-C8 alkyl refers to an alkyl group having from 1 to 8 carbons.
Alkyl groups may be optionally substituted with one or more substituents as defined herein. Alkyl groups may be straight or branched. Representative branched alkyl groups have one, two, or three branches. Alkyl includes methyl, ethyl, propyl (n-propyl and isopropyl), butyl (n-butyl, isobutyl, and t-butyl), pentyl (n-pentyl, isopentyl, and neopentyl), and hexyl.
"Alkenyl" refers to an unsaturated hydrocarbon chain having the specified number of carbons and having one at least one carbon-carbon double bond. For example, C2-C6 alkenyl refers to an alkenyl group having from 2 to 6 carbons. Alkenyl groups may be optionally substituted with one or more substituent as defined herein. Alkenyl groups may be straight or branched. They, may have a cis or trans configuration. Representative branched alkenyl groups have one, two, or three branches. Alkenyl includes ethylenyl, propenyl, butenyl, pentenyl, and hexenyl. "Alkynyl" refers to an unsaturated hydrocarbon chain having the specified number carbons and having one at least one carbon-carbon triple bond. For example, C2-C6 alkynyl refers to a group having from 2 to 6 carbons. Alkynyl groups may be optionally substituted with one or more substituent as defined herein. Alkynyl groups may be straight or branched. Alkynyl includes ethylynyl, propynyl, butynyl, pentynyl, and hexynyl. "Aryl" refers to a monovalent aromatic hydrocarbon ring. Aryl groups are monocyclic ring systems or bicyclic ring systems. Monocyclic aryl ring refers to phenyl. Bicyclic aryl ring refers to napthyl, biphenyl, and to rings wherein phenyl is fused to a cycloalkyl or cycloalkenyl ring having 5, 6, or 7 member atoms. Aryl groups may be optionally substituted with one or more substituents as defined herein. "Cycloalkyl" or "cycloalkenyl" refers to a saturated or unsaturated hydrocarbon ring having the specified number of carbons. For example, C3-C6 cycloalkyl refers to a cycloalkyl group having from 3 to 6 carbons. And C4-C6 cycloalkyenyl refers to a ring that has 4 to 6 carbons and at least 1 double bond. These rings are not aromatic. Either group may be optionally substituted with one or more substituents as defined herein. Cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl. Cycloalkenyl includes cyclobutenyl and cyclohexenyl, for example.
"Enantiomerically enriched" refers to products whose enantiomeric excess is greater than zero. For example, enantiomerically enriched refers to products whose enantiomeric excess is greater than 50% ee, greater than 75% ee, and greater than 90% ee.
"Enantiomeric excess" or "ee" is the excess of one enantiomer over the other expressed as a percentage. As a result, since both enantiomers are present in equal amounts in a racemic mixture, the enantiomeric excess is zero (0% ee). However, if one enantiomer was enriched such that it constitutes 95% of the product, then the enantiomeric excess would be 90% ee (the amount of the enriched enantiomer, 95%, minus the amount of the other enantiomer, 5%).
"Enantiomerically pure" refers to products whose enantiomeric excess is 99% ee or greater. "Half-life" ( or "half-lives") refers to the time required for half of a quantity of a substance to be converted to another chemically distinct specie in vitro or in vivo.
"Halo" refers to the halogen radical fluoro, chloro, bromo, or iodo.
"Haloalkyl" refers to an alkyl group that is substituted with one or more halo substituents. Haloalkyl includes trifrouromethyl. "Heteroaryl" refers to an aromatic ring containing from 1 to 4 heteroatoms in the ring. Heteroaryl groups containing more than one heteroatom may contain different heteroatoms. Heteroaryl groups may be optionally substituted with one or more substituents as defined herein. Unless otherwise specificed, heteroaryl groups are monocyclic ring systems or are fused, spiro, or bridged bicyclic ring systems. Monocyclic heteroaryl rings have 5 or 6 atoms. Bicyclic heteroaryl rings have from 7 to 1 1 atoms. Bicyclic heteroaryl rings include those rings wherein phenyl and a monocyclic heterocycloalkyl ring are attached forming a fused, spiro, or bridged bicyclic ring system, and those rings wherein a monocyclic heteroaryl ring and a monocyclic cycloalkyl, cycloalkenyl, heterocycloalkyl, or heteroaryl ring are attached forming a fused, spiro, or bridged bicyclic ring system. Heteroaryl includes pyrrolyl, pyrazolyl, imidazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, furanyl, furazanyl, thienyl, triazolyl, pyridinyl, pyrimidinyl, pyridazinyl, pyrazinyl, triazinyl, tetrazinyl, tetrazolyl, indolyl, isoindolyl, indolizinyl, indazolyl, purinyl, quinolinyl, isoquinolinyl, quinoxalinyl, quinazolinyl, pteridinyl, cinnolinyl, benzimidazolyl, benzopyranyl, benzoxazolyl, benzisoxazolyl, benzofuranyl, isobenzofuranyl, benzothiazolyl, benzisothiazolyl, benzothienyl, furopyridinyl, and napthyridinyl.
"Heteroatom" refers to a nitrogen, sulphur, or oxygen atom.
"Heterocycloalkyl" or "heterocycloalkenyl" refers to a saturated or unsaturated ring containing from 1 to 4 heteroatoms atoms in the ring. These rings are not aromatic. A ring containing more than one heteroatom may contain different heteroatoms. A ring may be optionally substituted with one or more substituent as defined herein, either on a carbon or on the heteroatom. Unless otherwise specified, these rings are monocyclic or may be fused, spiro, or a bridged bicyclic ring system. Monocyclic rings have from 5 to 7 member atoms. Bicyclic rings have from 7 to 1 1 member atoms. These rings include, for example, pyrrolidinyl, tetrahydrofuranyl, dihydrofuranyl, pyranyl, tetrahydropyranyl, dihydropyranyl, tetrahydrothienyl, pyrazolidinyl, oxazolidinyl, thiazolidinyl, piperidinyl, homopiperidinyl, piperazinyl, morpholinyl, thiamorpholinyl, azepinyl, 1 ,3-dioxolanyl, 1 ,3- dioxanyl, 1 ,4-dioxanyl, 1 ,3-oxathiolanyl, 1 ,3-oxathianyl, 1 ,3-dithianyl, azetidinyl, azabicylo[3.2.1]octyl, azabicylo[3.3.1]nonyl, azabicylo[4.3.0]nonyl, oxabicylo[2.2.1]heptyl, and
"Optionally substituted" indicates that a group, such as alkyl, alkenyl, alkynyl, aryl, cycloalkyl, cycloalkenyl, heterocycloalkyl, or heteroaryl, may be unsubstituted or substituted with one or more substituents as defined herein. "Substituted" in reference to a group indicates that a hydrogen atom attached to a member atom within a group is replaced. It should be understood that the term "substituted" includes the implicit provision that such substitution be in accordance with the permitted valence of the substituted atom and the substituent and that the substitution results in a stable compound (i.e. one that does not spontaneously undergo transformation such as by rearrangement, cyclization, or elimination). In certain embodiments, a single atom may be substituted with more than one substituent as long as such substitution is in accordance with the permitted valence of the atom. Suitable substituents are defined herein for each substituted or optionally substituted group.
"Pharmaceutically acceptable" refers to those compounds, materials, compositions, and dosage forms which are, within the scope of sound medical judgment, suitable for use in contact with the tissues of human beings and animals without excessive toxicity, irritation, or other problem or complication, commensurate with a reasonable benefit/risk ratio.
Compounds
Compounds of particular interest herein include, in collectively or independently, the following groups:
Compounds of Formula I where
R1 is independently selected from the group consisting of: halo, C1-C4 alkyl, CF3, CN, NO2, -ORa, and -OCF3;
Ra is H or C1-C4alkyl;
R2a is H, halo, -C(O)Rx, -C(O)ORy, or -C(O)NraRy; or R2a is -NRaRy, -NRaC(O)Rx, -NRaC(O)ORy, or -NRaC(O)NraRy; or R2a is R20, R21 , R22, R23, or R24; or R2a is -OH, -OR20, -OR21 , -OR22, -OR23, or -OR24; R2b is H; R2c is H; R3 is H;
Rx is Rd; and
Ry is phenyl optionally substituted with one or more substituents independently selected from the group consisting of: CF3, Rb, and -ORa.
The compounds according to Formula I may contain one or more asymmetric centers (also referred to as a chiral center) and may, therefore, exist as individual enantiomers, diastereomers, or other stereoisomeric forms, or as mixtures thereof. Chiral centers may also be present in a substituent such as an alkyl group. Where the stereochemistry of a chiral center present in Formula I, or in any chemical structure illustrated herein, is not specified the structure is intended to encompass any stereoisomer and all mixtures thereof. Thus, compounds according to Formula I containing one or more chiral center may be used as racemic mixtures, enantiomerically enriched mixtures, or as enantiomerically pure individual stereoisomers.
Individual stereoisomers of a compound according to Formula I which contain one or more asymmetric center may be resolved by methods known to those skilled in the art. For example, such resolution may be carried out (1 ) by formation of diastereoisomeric salts, complexes or other derivatives; (2) by selective reaction with a stereoisomer-specific reagent, for example by enzamatic oxidation or reduction; or (3) by gas-liquid or liquid chromatography in a chiral enviornment, for example, on a chiral support such as silica with a bound chiral ligand or in the presence of a chiral solvent. The skilled artisan will appreciate that where the desired stereoisomer is converted into another chemical entity by one of the separation procedures described above, a further step is required to liberate the desired form. Alternatively, specific stereoisomers may be synthesized by asymmetric synthesis using optically active reagents, substrates, catalysts or solvents, or by converting one enantiomer to the other by asymmetric transformation. The compounds according to Formula I may also contain double bonds or other centers of geometric asymmetry. Where the stereochemistry of a center of geometric asymmetry present in Formula I, or in any chemical structure illustrated herein, is not specified, the structure is intended to encompass the trans (E) geometric isomer, the cis
(Z) geometric isomer, and all mixtures thereof. If there is a cycloalkyl or cycloalkenyl group present, some substituent patterns may result in and axial or an equatorial configuration. Both forms are included, unless specified otherwise.
All tautomeric forms are also included in Formula I whether such tautomers exist in equilibrium or predominately in one form. In certain embodiments, compounds according to Formula I may contain an acidic functional group and are therefore capable of forming pharmaceutically-acceptable base addition salts by treatment with a suitable base. In certain other embodiments, compounds according to Formula I may contain a basic functional group and are therefore capable of forming pharmaceutically-acceptable acid addition salts by treatment with a suitable acid. Thus, the skilled artisan will appreciate that pharmaceutically-acceptable salts of the compounds according to Formula I may be prepared. Indeed, in certain embodiments of the invention, pharmaceutically-acceptable salts of the compounds according to Formula I may be preferred over the respective free base or free acid because such salts impart greater stability or solubility to the molecule thereby facilitating formulation into a dosage form. Accordingly, the invention is further directed to pharmaceutically-acceptable salts of the compounds according to Formula.
As used herein, the term "pharmaceutically-acceptable salts" refers to salts that retain the desired biological activity of the subject compound and exhibit minimal undesired toxicological effects. These pharmaceutically-acceptable salts may be prepared in situ during the final isolation and purification of the compound, or by separately reacting the purified compound in its free acid or free base form with a suitable base or acid, respectively.
As used herein, the term "compounds of the invention" means both the compounds according to Formula I and the pharmaceutically-acceptable salts thereof. The term "a compound of the invention" also appears herein and refers to both a compound according to Formula I and its pharmaceutically-acceptable salts.
In the solid state, compounds of the invention can exist in crystalline, semi- crystalline and amorphous forms, as well as mixtures thereof. The skilled artisan will appreciate that pharmaceutically-acceptable solvates of a compound of the invention may be formed wherein solvent molecules are incorporated into the solid-state structure during crystallization. Solvates may involve water or nonaqueous solvents, or mixtures thereof. In addition, the solvent content of such solvates can vary in response to environment and upon storage. For example, water may displace another solvent over time depending on relative humidity and temperature. Solvates wherein water is the solvent that is incorporated into the solid-state structure are typically referred to as "hydrates." Solvates wherein more than one solvent is incorporated into the solid-state structure are typically referred to as "mixed solvates". Solvates include "stoichiometric solvates" as well as compositions containing variable amounts of solvent (referred to as "non-stoichiometric solvates"). Stoichiometric solvates wherein water is the solvent that is incorporated into the solid-state structure are typically referred to as "stoichiometric hydrates", and non-stoichiometric solvates wherein water is the solvent that is incorporated into the solid-state structure are typically referred to as "non-stoichiometric hydrates". The invention includes both stoichiometric and non- stoichiometric solvates.
In addition, crystalline forms of a compound of the invention, including solvates thereof, may contain solvent molecules, which are not incorporated into the solid-state structure. For example, solvent molecules may become trapped in the crystals upon isolation. In addition, solvent molecules may be retained on the surface of the crystals. The invention includes such forms.
The skilled artisan will further appreciate that compounds of the invention, including solvates thereof, may exhibit polymorphism (i.e. the capacity to occur in different crystalline packing arrangements). These different crystalline forms are typically known as "polymorphs." The invention includes all such polymorphs. Polymorphs have the same chemical composition but differ in packing, geometrical arrangement, and other descriptive properties of the crystalline solid state. Polymorphs, therefore, may have different physical properties such as shape, density, hardness, deformability, stability, and dissolution properties. Polymorphs typically exhibit different IR spectra and X-ray powder diffraction patterns, which may be used for identification. Polymorphs may also exhibit different melting points, which may be used for identification. The skilled artisan will appreciate that different polymorphs may be produced, for example, by changing or adjusting the reaction conditions or reagents, used in making the compound. For example, changes in temperature, pressure, or solvent may result in the production of different polymorphs. In addition, one polymorph may spontaneously convert to another polymorph under certain conditions. Methods of Use The compounds of the invention inhibit the cathepsin C enzyme and can be useful in the treatment of conditions wherein the underlying pathology is (at least in part) attributable to cathepsin C involvement or in conditions wherein cathepsin C inhibition offers some clinical benefit even though the underlying pathology is not (even in part) attributable to cathepsin C involvement. Examples of such conditions include COPD, and rheumatoid arthritis. Accordingly, in another aspect the invention is directed to methods of treating such conditions. The methods of treatment of the invention comprise administering a safe and effective amount of a compound of the invention to a patient in need thereof. In one embodiment, the invention is directed to method for treating COPD. In another embodiment, the invention is directed to a method for treating rheumatoid arthritis. In yet another embodiment, the invention is directed to a method for treating abdominal or thoracic aneurism. In yet another embodiment, the invention is directed to a method for treating adult respiratory distress syndrome. In yet another embodiment, the invention is directed to a method for treating acute lung injury. In yet another embodiment, the invention is directed to a method for treating asthma. In yet another embodiment, the invention is directed to a method for treating osteoarthritis. In yet another embodiment, the invention is directed to a method for treating multiple sclerosis. In yet another embodiment, the invention is directed to a method for treating sepsis. In yet another embodiment, the invention is directed to a method for treating taxoplasmosis.
As used herein, "treatment" in reference to a condition means: (1 ) the amelioration or prevention of the condition being treated or one or more of the biological manifestations of the condition being treated, (2) the interference with (a) one or more points in the biological cascade that leads to or is responsible for the condition being treated or (b) one or more of the biological manifestations of the condition being treated, or (3) the alleviation of one or more of the symptoms or effects associated with the condition being treated. As indicated above, "treatment" of a condition includes prevention of the condition.
The skilled artisan will appreciate that "prevention" is not an absolute term. In medicine, "prevention" is understood to refer to the prophylactic administration of a drug to substantially diminish the likelihood or severity of a condition or biological manifestation thereof, or to delay the onset of such condition or biological manifestation thereof. As used herein, "safe and effective amount" in reference to a compound of the invention or other pharmaceutically-active agent means an amount of the compound sufficient to significantly induce a positive modification in the condition to be treated but low enough to avoid serious side effects (at a reasonable benefit/risk ratio) within the scope of sound medical judgment. A safe and effective amount of a compound of the invention will vary with the particular compound chosen (e.g. consider the potency, efficacy, and half-life of the compound); the route of administration chosen; the condition being treated; the severity of the condition being treated; the age, size, weight, and physical condition of the patient being treated; the medical history of the patient being treated; the duration of the treatment; the nature of concurrent therapy; the desired therapeutic effect; and like factors, but can nevertheless be determined by the skilled artisan. As used herein, "patient" refers to a human or other animal.
The compounds of the invention may be administered by any suitable route of administration, including both systemic administration and topical administration.
Systemic administration includes oral administration, parenteral administration, transdermal administration, rectal administration, and administration by inhalation.
Parenteral administration refers to routes of administration other than enteral, transdermal, or by inhalation, and is typically by injection or infusion. Parenteral administration includes intravenous, intramuscular, and subcutaneous injection or infusion. Inhalation refers to administration into the patient's lungs whether inhaled through the mouth or through the nasal passages. Topical administration includes application to the skin as well as intraocular, otic, intravaginal, and intranasal administration.
The compounds of the invention may be administered once or according to a dosing regimen wherein a number of doses are administered at varying intervals of time for a given period of time. For example, doses may be administered one, two, three, or four times per day. Doses may be administered until the desired therapeutic effect is achieved or indefinitely to maintain the desired therapeutic effect. Suitable dosing regimens for a compound of the invention depend on the pharmacokinetic properties of that compound, such as absorption, distribution, and half-life, which can be determined by the skilled artisan. In addition, suitable dosing regimens, including the amount administered and the duration such regimens are administered, for a compound of the invention depend on the condition being treated, the severity of the condition being treated, the age and physical condition of the patient being treated, the medical history of the patient to be treated, the nature of concurrent therapy, the particular route of administration chosen, the desired therapeutic effect, and like factors within the knowledge and expertise of the skilled artisan. It will be further understood by such skilled artisans that suitable dosing regimens may require adjustment given an individual patient's response to the dosing regimen or over time as individual patient needs change. Typical daily dosages range from 1 mg to 1000 mg.
Additionally, the compounds of the invention may be administered as prodrugs. As used herein, a "prodrug" of a compound of the invention is a functional derivative of the compound which, upon administration to a patient, eventually liberates the compound of the invention in vivo. Administration of a compound of the invention as a prodrug may enable the skilled artisan to do one or more of the following: (a) modify the onset of the compound in vivo; (b) modify the duration of action of the compound in vivo; (C) modify the transportation or distribution of the compound in vivo; (d) modify the solubility of the compound in vivo; and (e) overcome or overcome a side effect or other difficulty encountered with the compound. Typical functional derivatives used to prepare prodrugs include modifications of the compound that are chemically or enzymatically cleaved in vivo. Such modifications, which include the preparation of phosphates, amides, esters, thioesters, carbonates, and carbamates, are well known to those skilled in the art.
Compositions
The compounds of the invention will normally, but not necessarily, be formulated into a pharmaceutical composition prior to administration to a patient. Accordingly, in another aspect the invention is directed to pharmaceutical compositions comprising a compound of the invention and a pharmaceutically-acceptable excipient.
The pharmaceutical compositions of the invention may be prepared and packaged in bulk form wherein a safe and effective amount of a compound of the invention can be extracted and then given to the patient such as with powders, syrups, and solutions for injection. Alternatively, the pharmaceutical compositions of the invention may be prepared and packaged in unit dosage form wherein each physically discrete unit contains a safe and effective amount of a compound of the invention. When prepared in unit dosage form, the pharmaceutical compositions of the invention typically contain from 1 mg to 1000 mg.
The pharmaceutical compositions of the invention typically contain one compound of the invention. However, in certain embodiments, the pharmaceutical compositions of the invention contain more than one compound of the invention. For example, in certain embodiments the pharmaceutical compositions of the invention contain two compounds of the invention. In addition, the pharmaceutical compositions of the invention may optionally further comprise one or more additional pharmaceutically active compounds. Conversely, the pharmaceutical compositions of the invention typically contain more than one pharmaceutically-acceptable excipient. However, in certain embodiments, the pharmaceutical compositions of the invention contain one pharmaceutically-acceptable excipient.
As used herein, "pharmaceutically-acceptable excipient" means a pharmaceutically acceptable material, composition or vehicle involved in giving form or consistency to the pharmaceutical composition. Each excipient must be compatible with the other ingredients of the pharmaceutical composition when commingled such that interactions which would substantially reduce the efficacy of the compound of the invention when administered to a patient and interactions which would result in pharmaceutical compositions that are not pharmaceutically acceptable are avoided. In addition, each excipient must of course be of sufficiently high purity to render it pharmaceutically-acceptable. The compound of the invention and the pharmaceutically-acceptable excepient or excepients will typically be formulated into a dosage form adapted for administration to the patient by the desired route of administration. For example, dosage forms include those adapted for (1 ) oral administration such as tablets, capsules, caplets, pills, troches, powders, syrups, elixers, suspensions, solutions, emulsions, sachets, and cachets; (2) parenteral administration such as sterile solutions, suspensions, and powders for reconstitution; (3) transdermal administration such as transdermal patches; (4) rectal administration such as suppositories; (5) inhalation such as aerosols and solutions; and (6) topical administration such as creams, ointments, lotions, solutions, pastes, sprays, foams, and gels.
Suitable pharmaceutically-acceptable excipients will vary depending upon the particular dosage form chosen. In addition, suitable pharmaceutically-acceptable excipients may be chosen for a particular function that they may serve in the composition. For example, certain pharmaceutically-acceptable excipients may be chosen for their ability to facilitate the production of uniform dosage forms. Certain pharmaceutically- acceptable excipients may be chosen for their ability to facilitate the production of stable dosage forms. Certain pharmaceutically-acceptable excipients may be chosen for their ability to facilitate the carrying or transporting the compound or compounds of the invention once administered to the patient from one organ, or portion of the body, to another organ, or portion of the body. Certain pharmaceutically-acceptable excipients may be chosen for their ability to enhance patient compliance.
Suitable pharmaceutically-acceptable excipients include the following types of excipients: Diluents, fillers, binders, disintegrants, lubricants, glidants, granulating agents, coating agents, wetting agents, solvents, co-solvents, suspending agents, emulsifiers, sweetners, flavoring agents, flavor masking agents, coloring agents, anticaking agents, hemectants, chelating agents, plasticizers, viscosity increasing agents, antioxidants, preservatives, stabilizers, surfactants, and buffering agents. The skilled artisan will appreciate that certain pharmaceutically-acceptable excipients may serve more than one function and may serve alternative functions depending on how much of the excipient is present in the formulation and what other ingredients are present in the formulation.
Skilled artisans possess the knowledge and skill in the art to enable them to select suitable pharmaceutically-acceptable excipients in appropriate amounts for use in the invention. In addition, there are a number of resources that are available to the skilled artisan which describe pharmaceutically-acceptable excipients and may be useful in selecting suitable pharmaceutically-acceptable excipients. Examples include Remington's Pharmaceutical Sciences (Mack Publishing Company), The Handbook of Pharmaceutical Additives (Gower Publishing Limited), and The Handbook of Pharmaceutical Excipients (the American Pharmaceutical Association and the Pharmaceutical Press).
The pharmaceutical compositions of the invention are prepared using techniques and methods known to those skilled in the art. Some of the methods commonly used in the art are described in Remington's Pharmaceutical Sciences (Mack Publishing Company).
In one aspect, the invention is directed to a solid oral dosage form such as a tablet or capsule comprising a safe and effective amount of a compound of the invention and a diluent or filler. Suitable diluents and fillers include lactose, sucrose, dextrose, mannitol, sorbitol, starch (e.g. corn starch, potato starch, and pre-gelatinized starch), cellulose and its derivatives (e.g. microcrystalline cellulose), calcium sulfate, and dibasic calcium phosphate. The oral solid dosage form may further comprise a binder. Suitable binders include starch (e.g. corn starch, potato starch, and pre-gelatinized starch), gelatin, acacia, sodium alginate, alginic acid, tragacanth, guar gum, povidone, and cellulose and its derivatives (e.g. microcrystalline cellulose). The oral solid dosage form may further comprise a disintegrant. Suitable disintegrants include crospovidone, sodium starch glycolate, croscarmelose, alginic acid, and sodium carboxymethyl cellulose. The oral solid dosage form may further comprise a lubricant. Suitable lubricants include stearic acid, magnesuim stearate, calcium stearate, and talc. In another aspect, the invention is directed to a dosage form adapted for administration to a patient by inhalation. For example, the compound of the invention may be inhaled into the lungs as a dry powder, an aerosol, a suspension, or a solution.
Dry powder compositions for delivery to the lung by inhalation typically comprise a compound of the invention as a finely divided powder together with one or more pharmaceutically-acceptable excipients as finely divided powders. Pharmaceutically- acceptable excipients particularly suited for use in dry powders are known to those skilled in the art and include lactose, starch, mannitol, and mono-, di-, and polysaccharides.
The dry powder may be administered to the patient via a reservoir dry powder inhaler (RDPI) having a reservoir suitable for storing multiple (un-metered doses) of medicament in dry powder form. RDPIs typically include a means for metering each medicament dose from the reservoir to a delivery position. For example, the metering means may comprise a metering cup, which is movable from a first position where the cup may be filled with medicament from the reservoir to a second position where the metered medicament dose is made available to the patient for inhalation. Alternatively, the dry powder may be presented in capsules (e.g. gelatin or plastic), cartridges, or blister packs for use in a multi-dose dry powder inhaler (MDPI). MDPIs are inhalers wherein the medicament is comprised within a multi-dose pack containing (or otherwise carrying) multiple defined doses (or parts thereof) of medicament. When the dry powder is presented as a blister pack, it comprises multiple blisters for containment of the medicament in dry powder form. The blisters are typically arranged in regular fashion for ease of release of the medicament therefrom. For example, the blisters may be arranged in a generally circular fashion on a disc-form blister pack, or the blisters may be elongate in form, for example comprising a strip or a tape. Each capsule, cartridge, or blister may, for example, contain between 20μg-1 Omg of the compound of the invention.
Aerosols may be formed by suspending or dissolving a compound of the invention in a liquified propellant. Suitable propellants include halocarbons, hydrocarbons, and other liquified gases. Representative propellants include: trichlorofluoromethane (propellant 11 ), dichlorofluoromethane (propellant 12), dichlorotetrafluoroethane (propellant 114), tetrafluoroethane (HFA-134a), 1 ,1-difluoroethane (HFA-152a), difluoromethane (HFA-32), pentafluoroethane (HFA-12), heptafluoropropane (HFA-227a), perfluoropropane, perfluorobutane, perfluoropentane, butane, isobutane, and pentane. Aerosols comprising a compound of the invention will typically be administered to a patient via a metered dose inhaler (MDI). Such devices are known to those skilled in the art.
The aerosol may contain additional pharmaceutically-acceptable excipients typically used with MDIs such as surfactants, lubricants, cosolvents and other excipients to improve the physical stability of the formulation, to improve valve performance, to improve solubility, or to improve taste.
Suspensions and solutions comprising a compound of the invention may also be administered to a patient via a nebulizer. The solvent or suspension agent utilized for nebulization may be any pharmaceutically-acceptable liquid such as water, aqueous saline, alcohols or glycols, e.g., ethanol, isopropylalcohol, glycerol, propylene glycol, polyethylene glycol, etc. or mixtures thereof. Saline solutions utilize salts which display little or no pharmacological activity after administration. Both organic salts, such as alkali metal or ammonium halogen salts, e.g., sodium chloride, potassium chloride or organic salts, such as potassium, sodium and ammonium salts or organic acids, e.g., ascorbic acid, citric acid, acetic acid, tartaric acid, etc. may be used for this purpose.
Other pharmaceutically-acceptable excipients may be added to the suspension or solution. The compound of the invention may be stabilized by the addition of an inorganic acid, e.g., hydrochloric acid, nitric acid, sulphuric acid and/or phosphoric acid; an organic acid, e.g., ascorbic acid, citric acid, acetic acid, and tartaric acid, etc., a complexing agent such as EDTA or citric acid and salts thereof; or an antioxidant such as antioxidant such as vitamin E or ascorbic acid. These may be used alone or together to stabilize the compound of the invention. Preservatives may be added such as benzalkonium chloride or benzoic acid and salts thereof. Surfactant may be added particularly to improve the physical stability of suspensions. These include lecithin, disodium dioctylsulphosuccinate, oleic acid and sorbitan esters.
Compound Preparation The compounds according to Formula I are prepared using conventional organic syntheses. Suitable synthetic routes are depicted below in the following general reaction schemes. Starting materials and reagents depicted below in the general reaction schemes are commercially available or can be made from commercially available starting materials using methods known by those skilled in the art.
The skilled artisan will appreciate that if a substituent described herein is not compatible with the synthetic methods described herein, the substituent may be protected with a suitable protecting group that is stable to the reaction conditions. The protecting group may be removed at a suitable point in the reaction sequence to provide a desired intermediate or target compound. Suitable protecting groups and methods for protecting and de-protecting different substituents using such suitable protecting groups are well known to those skilled in the art; examples of which may be found in T. Greene and P. Wuts, Protecting Groups in Chemical Synthesis (3rd ed.), John Wiley & Sons, NY (1999). In some instances, a substituent may be specifically selected to be reactive under the reaction conditions used. Under these circumstances, the reaction conditions convert the selected substituent into another substituent that is either useful as an intermediate compound or is a desired substituent in a target compound.
As used herein, "BrCN" refers to a 3 N BrCN solution in DCM, and PS-trisamine refers to a tris-(2-aminoethyl)amine polystyrene resin. LC-MS of Intermediates and Examples were carried out using the following equipment and conditions:
Liquid Chromatoqraph:
System: Shimadzu LC system with SCL-10A Controller and dual UV detector Autosampler: Leap CTC with a Valco six port injector
Column: Aquasil/Aquasil (C18 40x1 mm)
Inj. Volume: 2.0 μL
Solvent A: H2O, 0.02% TFA
Solvent B: MeCN, 0.018% TFA Gradient: linear
Channel A: UV 214 nm Channel B: ELS
Step Time (min) Dura.(min) Flow (μL/min) SSooll..AA Sol. B
0 0.00 0.00 300.00 95.00 5.00
1 0.00 0.01 300.00 95.00 5.00
2 0.01 3.20 300.00 10.00 90.00
3 3.21 1.00 300.00 10.00 90.00
4 4.21 0.10 300.00 95.00 5.00
5 4.31 0.40 300.00 95.00 5.00
Mass Spectrometer:
Instrument: PE Sciex Single Quadrupole LC/MS API-150
Polarity: Positive
Acquisition mode: Profile
Automated preparatory HPLC purifications were conducted using a Gilson® semi- preparative HPLC system under the following conditions:
• Column: 75 x 33mm I. D. , S-5um, 12nm
• Flow rate: 30mL/min • Injection Volume: 0.800 mL
• Room temperature
• The eluent was a mixture composed of solvents A and B:
• Solvent A: 0.1% trifluoroacetic acid in water
• Solvent B: 0.1% trifluoroacetic acid in acetonitrile
Automated flash chromatography purifications were conducted using a CombiFlash® Companion® personal flash chromatography system under the following conditions:
• Silica cartridge:
• Size, 4, 12, 40, 80 or 120 g depending on the amount of material to be purified • Flow rate: Between 4 and 85 mL/min
• Room temperature
• The eluent was a mixture composed of solvents A and B:
• Solvent A: Hexane
• Solvent B: Ethyl acetate Methods for making compounds are illustrated in the following schemes. Scheme 1
Figure imgf000022_0001
i
Figure imgf000022_0002
Scheme 1 reagents and conditions: a) MeOH, AcCI; b) (BOC)2O, TEA; c) TBSCI, imidazole; d) LiBH4; e) MsCI, TEA; f) LiEt3BH; g) TBAF, THF; h) same as e); i) tBu4N+N3 ", CH3CN; j) H2, Pd/C, MeOH; k) (R1 )nPhS02CI, TEA; I) 4 N HCI, Dioxane ;m) BrCN, DCM.
Scheme 1 represents a general reaction scheme for preparing compounds according to Formula I wherein R2a, R2b, R2c, and R3 are each H. R1 and n are as defined above unless otherwise defined. As shown in Scheme 1 , the (5S)-methyl substituted compounds of Formula (I) can be prepared in a multi-step sequence from the commercially available (4S)-4-hydroxy-D-proline 1.. Esterification of 1 in acidic methanol, followed by successive conversion of the amine to the corresponding BOC derivative then of the secondary alcohol to a TBS ether using standard functional group protection procedures well know in the art, gives, after reduction of the methyl ester moiety, the primary alcohol 2. Subsequent conversion of 2 to the corresponding methanesulfonate ether followed by treatment with lithium triethyl borohydride produces the (5S)-methyl derivative 3. Further desilylation of compound 3 following standard deprotection procedures well known in the art such as treatment with TBAF gives a secondary alcohol intermediate, which is transformed to the azide 4 with inversion of configuration at C-3 by activation of the alcohol as methanesulfonate ether and treatment with an azide reagent such as tetra-t-butyl ammonium azide. Palladium-catalyzed reduction of 4 with hydrogen followed by treatment with a suitable sulfonyl chloride RiSO2CI gives the derivative 5. Subsequent removal of the BOC protecting group with an acid reagent such as 4N HCI in dioxane followed by treatment with cyanogen bromide results in the formation of the desired final compound 6. Scheme 2
Figure imgf000023_0001
Figure imgf000023_0002
Scheme 2 reagents and conditions: a) RxCOCI, base; b) TBAF, THF; c) MsCI, TEA; d) tBu4N+N3 ", CH3CN; e) H2, Pd/C; f) (R1 )nPhS02CI, TEA; g) Hydrolysis; h) H+ ; i) BrCN, DCM; k) RyN=C=O (where Ry is not H and Ra is H) TEA or RyRaNC(O)CI (where Ry and Ra are not H), TEA or CDI, DCM then RyRaNH (where Ry and Ra are not H).
Scheme 2 represents a general reaction scheme for preparing compounds according to Formula I wherein R2a is -OC(O)Rx or -OC(O)NRaRy and R2b, R2c, and R3 are each H. R1 and n are as defined above unless otherwise defined. As depicted in Scheme 2, compound 2 can be treated with a suitable acyl chloride to produce the corresponding ester 7. Conversion of 7 to the primary amine 8 is carried out following a sequence of reactions analogous to that shown in Scheme 1. Treatment of 8 with a suitable sulfonyl chloride produces compound 9 that can be further elaborated to the ester derivative IJ) of Formula (I) following a two-step cyanation procedure analogous to that depicted in Scheme 1. Alternatively, intermediate 9 can be hydrolysed to a primary alcohol using standard conditions such as LiOH in methanol and water and subsequently treated with a suitable reagent to produce the carbamate derivative IJ.. Transformation to the corresponding cyanamide Λ2 of Formula (I) can be achieved following a two-step cyanation procedure analogous to that depicted in Scheme 1. Scheme 3
Figure imgf000024_0001
Scheme 3 reagents and conditions: a) NaH, RX, DMF; b) TBAF, THF; c) MsCI, TEA; d) tBu4N+N3 ", CH3CN; e) H2, Pd/C; f) (R1 )nPhS02CI, TEA; g) H+ ; h) BrCN, DCM; i) PPh3, DEAD, DCM, ArOH (where Ar is R23 or R24).
Scheme 3 represents a general reaction scheme for preparing compounds according to Formula I wherein R2a is an ether functional group (-OR20, -0R21 , -OR22, - OR23, or -OR24) and R2b, R2c, and R3 are each H. R1 and n are as defined above unless otherwise defined. As depicted in Scheme 3, compound 2 can be treated with a suitable alkylating reagent in the presence of a base such as sodium hydride and an organic solvent such as DMF to give the corresponding ether intermediate H (R = R20, R21 , or R22). Alternatively, a Mitsunobu reaction between 2 and a suitable hydroxy aryl derivative following procedures well known in the art affords the corresponding phenoxy or heteroaryloxy substituted compound 1j> (Ar = R23 or R24). Both intermediates 13 and 1j> can be further elaborated respectively to the cyanamide J4 or J6 of Formula (I) following a sequence of reactions analogous to that depicted in Scheme 1.
Scheme 4
Figure imgf000025_0001
Scheme 4 reagents and conditions: a) phthalimide, PPh3, DEAD; c) TBAF, THF; d) MsCI, TEA, DMAP; e) tBu4N+N3 ", CH3CN; f) H2, Pd/C; g) (R1 )nPhS02CI, TEA; h) H+ ; i) BrCN, DCM; j) hydrazine, EtOH k) RyN=C=O (where Ry is not H and each Ra is H), DCM; I) RxC(O)CI, TEA; m) Phenyl chloroformate, TEA then RyNHRa
Scheme 4 represents a general reaction scheme for preparing compounds according to Formula I wherein R2a is -NRaC(O)Rx, -NRaC(O)NRaRy, NRaC(O)R22, or pthalimidyl, and each Ra is H. R2b, R2c, and R3 are each H. R1 and n are as defined above unless otherwise defined. As depicted in Scheme 4, compound 2 can be transformed to the phthalimide derivative X7_, by conversion to the corresponding methanesulfonate ether followed by treatment with phthalimide in the presence of a base following procedures well known in the art. Intermediate X7_ can be further processed to the primary amine ΛZ_ following a four-step sequence analogous to that depicted in Scheme 1. Treatment of 18 with a suitable sulfonyl chloride produces compound 19 that can be further elaborated to the phthalimide derivative 20 of Formula (I) following a two- step cyanation procedure analogous to that depicted in Scheme 1. Alternatively, removal of the phthalimide group by reaction with a nucleophile such as methylamine or hydrazine leads to the amine intermediate 21_. Coupling of compound 21_ with a suitable reagent such as an acyl chloride or an isocyanate (either bought from a commercial source or prepared from a carboxylic acid via the Curtius reaction) followed by a two-step cyanation procedure analogous to that depicted in Scheme 1 produces respectively the amide 22 or the urea 23. Alternatively 23 can be prepared by reacting 21. with phenylchoroformate followed by treatement with an amine and a two-step cyanation procedure analogous to that depicted in Scheme 1. Scheme 5
Figure imgf000026_0001
24 25 26
Scheme 5 reagents and conditions: a) R3X, NaH; b) H+ c) BrCN, DCM
Scheme 5 represents a general reaction scheme for preparing compounds according to Formula I wherein R3 is a functional group as defined other than H. R2a, R2b, R2c, R1 and n are as defined above unless otherwise defined. As depicted in Scheme 5, a suitably protected intermediate 24, which can prepared following procedures analogous to those depicted in Schemes 1-4, can be treated with an alkylating reagent R3X in the presence of a base such as NaH to give the N-alkylated derivative 25. Subsequent removal of the BOC protecting group of 25 with an acid reagent such as 4N HCI in dioxane followed by treatment with cyanogen bromide results in the formation of the desired compounds 26.
Scheme 6
NHBO
Figure imgf000027_0001
Figure imgf000027_0002
Scheme 6 reagents and conditions: a) NHOMe; b) LiAIH4; c) (PhP)3P+Br", base; d) AIIyI bromide, NaH; e) Grubbs catalyst, DCM; f) BH3, H2O2; g) DPPA, DEAD or Ms2O then NaN3; h) H2, Pd/C; i) (R1 )nPhS02CI, TEA; j) H+ ; k) BrCN, DCM;.
Scheme 6 represents another general reaction scheme for preparing compounds according to Formula I wherein R3 is H. R2a, R2b, R2c, R1 and n are as defined above unless otherwise defined. As depicted in Scheme 6, a suitable BOC-protected amino-acid 27 is transformed to the corresponding alkene derivative 28 by first conversion to the corresponding Weinreb amide, followed by reduction with LiAIH4 and subsequent Wittig reaction with tri-phenyl phosphonium bromide in the presence of a strong base following procedures well known to those skilled in the art. Treatment of 28 with allyl bromide in the presence of a base such as NaH leads to the formation of the disubtituted derivative 29. Compound 29 can undergo a ring closing metathesis reaction using Grubbs' catalyst to give the pyrroline derivative 30. Oxidative hydroboration of 30, followed by treatment of the resulting alcohol with DPPA or a mesylation/azide displacement reaction sequence then hydrogenation of the azide intermediate yields amine 31.. Treatment of compound 3J. with a suitable sulfonyl chloride followed by a two-step cyanation procedure analogous to that depicted in Scheme 1 , produces compound 32. Scheme 7
Figure imgf000028_0001
Scheme 7 reagents and conditions: a) aldehyde, NaBH4; b) MeONa, MeOH or LiOH, MeOH, H2O; c) NaBr, TEMPO, DCM; d) RaRyNH, PS-(OAc)3BH; e) H+ ; f) BrCN, DCM;.
Scheme 7 represents general reaction schemes for preparing compounds according to Formula I wherein R2a is an amine functional group (-NRaRy) and R2b, R2c, and R3 are each H. R1 and n are as defined above unless otherwise defined. As depicted in Scheme 7, compound 21 can be treated with a suitable aldehyde in the presence of sodium borohydride to give an intermediate which can subsequently undergo a two-step cyanation procedure analogous to that depicted in Scheme 1 to give compound 33 of Formula (I). Alternatively, compound 9 can be hydrolysed or methanolysed then re- oxidized with a suitable reagent such as TEMPO to give an aldehyde intermediate 34. Compound 34 can undergo a reductive amination with a suitable amine in the presence of a polymer-supported triacetoxy borohydride reagent then a two-step cyanation procedure analogous to that depicted in Scheme 1 to produce compound 33^ Scheme 8
Figure imgf000028_0002
Scheme 8 reagents and conditions: a) MsCI, TEA; b) tBuN+CN", AcCN; c) TBAF, THF then MsCI, TEA; d) tBuN+N3 ", CH3CN; e) H2, Pd/C; f) (R1 )nPhSO2CI, TEA; g) H+ ; h) BrCN, DCM.
Scheme 8 represents a general reaction scheme for preparing compounds according to Formula I wherein R2a is a nitrile functional group (-CN) and R2b, R2c, and
R3 are each H. R1 and n are as defined above unless otherwise defined. As depicted in
Scheme 8, compound 2 can be mesylated then treated with a cyanide reagent such as tetrabutylammonium cyanide to give the nitrile derivative 35. Compound 35 can then be transformed into compound 36 of Formula I following a sequence of reactions analogous to that depicted in Scheme 3 for the preparations of the ether derivatives .14 and 1j> from the intermediates 13. and 15.
Intermediates
The following Intermediate compounds are useful for preparing compounds of Formula I.
Intermediate 1 methyl (4S)-4-hydroxy-D-prolinate
Figure imgf000029_0001
In a three necked flask under argon atmosphere equipped with a magnetic stir bar and a reflux condenser was placed MeOH (7 ml_). To the system was added acetyl chloride (0.898 g, 11.4 mmol) in an ice bath followed by (4S)-4-hydroxy-D-proline (1 g, 7.6 mmol). The resultant mixture was heated at reflux for 12 hours and cooled down to room temperature. Ether was added to cause precipitation and the resulting brown powder was filtered off to afford the title compound. LC-MS: m/z, 146 (M+H).
Intermediate 2
1-(1,1 -dimethylethyl) 2-methyl (2R,4S)-4-hydroxy-1,2-pyrrolidinedicarboxylate
Figure imgf000029_0002
To methyl (4S)-4-hydroxy-D-prolinate (1.1 147 g, 7.6 mmol) in DCM (8 ml.) was added triethylamine (3.19 ml_, 22.9 mmol) while the bath cooled down to O0C. To the resultant mixture, di-tert-butyl dicarbonate (1.8318 g, 8.4 mmol) was added, stirred from O 0C to room temperature over the weekend. The resultant mixture was washed with 1 N HCI and NaHCOs solution, dried over MgSO4 and evaporated to afford the title compound as a yellow oil (1.4406 g). LC-MS: m/z, 246 (M+H).
Intermediate 3
1-(1,1 -dimethylethyl) 2-methyl (2R,4S)-4-{[(1,1 -dimethylethyl)(dimethyl)silyl]oxy}-1,2- pyrrolidinedicarboxylate
Figure imgf000030_0001
To 1-(1 ,1-dimethylethyl) 2-methyl (2R,4S)-4-hydroxy-1 ,2-pyrrolidinedicarboxylate
(1.4406 g, 5.9 mmol) in DMF (~4 ml.) was added imidazole (0.4399 g, 6.46 mmol) and TBSCI (1.8512 g, 12.3 mmol). The resultant mixture was stirred at room temperature for 1.5 hours and diluted in ether and water. The organic layers were washed with 1 N HCI and NaHCOs solution, dried on MgSO4 and the ether removed under vacuum to afford the title compound as a yellow liquid (2.3591 g). LC-MS: m/z, 360 (M+H).
Intermediate 4
1,1 -dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2-
(hydroxymethyl)-i-pyrrolidinecarboxylate
Figure imgf000030_0002
1 -(1 , 1 -dimethylethyl) 2-methyl (2R,4S)-4-{[(1 , 1 -dimethylethyl)(dimethyl)silyl]oxy}- 1 ,2-pyrrolidinedicarboxylate (2.3591 g, 6.56 mmol) was diluted in THF (3O mL) and the mixture was cooled down to 0 0C under argon. To the resultant mixture a solution of LiBH4 in THF (15 mL) was added dropwise over 30 minutes, and stirred from 0 0C to room temperature overnight. The reaction mixture was cooled down to 0 0C, neutralized with 1 N HCI, and water (50 mL) and ethyl acetate (50 mL) were added. The layers were separated and the aqueous layer was extracted with ethyl acetate (-30 mL). The organic layers were combined and washed with NaHCOs solution (3 x 20 mL), dried on MgSO4 and evaporated under vacuum to afford the title compound as a colorless liquid (2.02 g). LC-MS: m/z, 332 (M+H).
Intermediate 5
1,1 -dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2-
{[(methylsulfonyl)oxy]methyl}-1-pyrrolidinecarboxylate
Figure imgf000031_0001
To 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2- (hydroxymethyl)-i-pyrrolidinecarboxylate (2.02 g, 6.09 mmol) in DCM (-12 ml.) was added triethylamine (1.69 ml_, 12.19 mmol). The resultant mixture was placed under argon and cooled down to -10 0C. To the resultant mixture methanesulfonyl chloride (0.71 ml_, 9.14 mmol) was added and stirred from -10 0C to room temperature overnight. The reaction mixture was diluted in DCM (-50 ml.) and water (-50 ml.) and the layers were separated. The organic layer was washed with 1 N HCI (2 x 20 ml_), neutralized with NaHCO3 solution, dried on MgSO4 and the DCM was evaporated under vacuum to afford the title compound as a colorless liquid (1.9462 g). LC-MS: m/z, 410 (M+H).
Intermediate 6
1,1 -dimethylethyl (2S,4S)-4-{[(1,1 -dimethylethyl)(dimethyl)silyl]oxy}-2-methyl-1- pyrrolidinecarboxylate
Figure imgf000031_0002
1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2-
{[(methylsulfonyl)oxy]methyl}-1 -pyrrolidinecarboxylate (0.1 g, 0.24 mmol) was diluted in THF (1 mL) and the mixture was cooled down to 00C under argon. To the resultant mixture LiEt3BH (superhydride), (2.44 mL, 2.44 mmol) was added dropwise and stirred at room temperature for 2 hours. The reaction mixture was diluted in water (40 mL) and ethyl acetate (60 mL), the layers were separated and the aqueous layer was extracted with ethyl acetate. The organic layers were combined, washed with 1 N HCI and NaHCO3 solution, dried on MgSO4 and the solvent was evaporated to afford the title compound as an orange oil (0.0824 g). LC-MS: m/z, 316 (M+H).
Intermediate 7 1,1 -dimethylethyl-(2S,4S)-4-hydroxy-2-methyl-1 -pyrrolidinecarboxylate
Figure imgf000032_0001
To 1 ,1-dimethylethyl (2S,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2-methyl-1- pyrrolidinecarboxylate (0.19201 g, 6.08 mmol) in THF (~1 ml.) was added TBAF (12 ml_,
12.17 mmol) under argon. The resultant mixture was stirred at room temperature for 3 hours and purified by flash chromatography (silica gel) with gradient ethyl acetate:hexanes
(1 :2) to (2:1 ) to afford the title compound (1.0326 g). LC-MS: m/z, 202 (M+H).
Intermediate 8
1,1 -dimethylethyl (2S,4S)-2-methyl-4-[(methylsulfonyl)oxy]-1-pyrrolidinecarboxylate
Figure imgf000032_0002
1 ,1-dimethylethyl (2S,4S)-4-hydroxy-2-methyl-1-pyrrolidinecarboxylate (1.0326 g,
5.13 mmol) in DCM (~2 mL) was placed under argon and cooled to 0 0C. To the reaction mixture was added triethylamine (1.2973 g, 12.8 mmol) and methanesulfonyl chloride (1.1753 g, 10.3 mmol). The resultant mixture was stirred for 16 hours and diluted in ether (-100 mL) and water (-60 mL). The aqueous layer was extracted with ethyl acetate (x2). The organic layers were combined, washed with 1 N HCI and NaHCO3 solution, dried on MgSO4 and the solvent evaporated under vacuum to afford the title compound as a yellow liquid (0.6395 g). LC-MS: m/z, 280 (M+H).
Intermediate 9
1,2-dimethylethyl-(2S,2R)-4-azido-2-methyl-1 -pyrrolidinecarboxylate
Figure imgf000032_0003
To 1 ,1 -dimethylethyl (2S,4S)-2-methyl-4-[(methylsulfonyl)oxy]-1 - pyrrolidinecarboxylate (1.55 g, 5.55 mmol) in acetonitrile (15 mL) was added tertabutylammonium azide (1.77 g, 6.22 mmol) in acetonitrile (10 ml). The resultant mixture was heated at reflux overnight. The solvent was removed under vacuum and the resulting crude material was diluted in ethyl acetate (-300 ml) and water (-100 ml). Both layers were separated and the aqueous layer was extracted again with ethyl acetate (x 2).
The organic layers were combined, dried over MgSO4 then concentrated under vacuum to give a crude material, which was purified by automated flash chromatography (40 g silica cartridge) to afford the title compound as a colorless liquid (0.966 g). LC-MS: m/z, 227
(M+H).
Intermediate 10
1,1 -dimethylethyl (2S,4R)-4-amino-2-methyl-1 -pyrrolidinecarboxylate
BOC
'"•••
1 ,1 -dimethylethyl (2S,4R)-4-azido-2-methyl-1 -pyrrolidinecarboxylate (0.966 g,
4.26 mmol) in MeOH (-10 mL) was hydrogenated over 10% Pd/C in a H-Cube™ reactor (ThalesNano Nanotechnology Inc., H1031 Budapest, Zahony u. 7., Graphisoft Park Hungary, http://www.thalesnano.com/products/h-cube-midi). The solvent was evaporated under vacuum to afford the title compound as a colorless liquid (0.898 g). LC-MS: m/z, 201 (M+H).
Intermediate 11
1,1 -dimethylethyl (2S,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-methyl-1 - pyrrolidinecarboxylate
Figure imgf000033_0001
To 1 ,1 -dimethylethyl (2S,4R)-4-amino-2-methyl-1 -pyrrolidinecarboxylate (0.080 g, 0.40 mmol) in DCM (-3 mL) was added DIPEA (0.12 mL, 0.70 mmol) and 2,5- dibromobenzenesulfonyl chloride (0.1 17 g, 0.35 mmol). The resultant mixture was stirred at room temperature for 3 hours; the solvent was evaporated under vacuum and loaded onto a 5 g silica SPE cartridge, eluting sequentially with dichloromethane and ethyl acetate. The ethyl acetate fractions were combined and evaporated to afford the title compound (0.1627 g). LC-MS: m/z, 500 (M+H).
Intermediate 12
1,1 -dimethylethyl (2S,4R)-4-{[(2,5-dichlorophenyl)sulfonyl]amino}-2-methyl-1 - pyrrolidinecarboxylate
Figure imgf000034_0001
To 1 ,1-dimethylethyl (2S,4R)-4-amino-2-methyl-1-pyrrolidinecarboxylate (0.0208 g,
0.10 mmol) in DCM (~1 ml.) was added DIPEA (0.04 ml_, 0.20 mmol) and 2,5-dichlorobenzenesulfonyl chloride (0.026 g, 0.10 mmol). The resultant mixture was stirred at room temperature for 16 hours, the solvent evaporated under vacuum to yield a brown oil which was loaded onto a 2 g silica SPE cartridge, eluting sequentially with dichloromethane and ethyl acetate. The DCM fractions were combined and evaporated to afford the title compound as a colorless liquid (0.0149 g). LC-MS: m/z, 410 (M+H).
Intermediate 13
1,1 -dimethylethyl (2S,4R)-4-({[2,5-bis(methyloxy)phenyl]sulfonyl}amino)-2-methyl-1 - pyrrolidinecarboxylate
Figure imgf000034_0002
To 1 ,1-dimethylethyl (2S,4R)-4-amino-2-methyl-1 -pyrrolidinecarboxylate (0.100 g, 0.50 mmol) in DCM (~5 mL) was added DIPEA (0.176 mL, 1 mmol) and 2,5-bis(methyloxy)benzenesulfonyl chloride (0.118 g, 0.50 mmol). The resultant mixture was stirred at room temperature overnight, the solvent evaporated under vacuum and the resulting crude diluted in DCM. The DCM layer was isolated and loaded onto a silica SPE cartridge, eluting sequentially with DCM and ethyl acetate. The relevant fractions were combined and evaporated to afford the title compound (0.0615 g). LC-MS: m/z, 401 (M+H).
Intermediate 14
1,1 -dimethylethyl (2S,4R)-4-{[(3-bromophenyl)sulfonyl]amino}-2-methyl-1- pyrrolidinecarboxylate
Figure imgf000035_0001
Intermediate 14 was prepared using the general procedure described above for Intermediate 13, replacing 2,5-bis(methyloxy)benzenesulfonyl chloride (0.1 18 g, 0.50 mmol) with 3-bromobenzenesulfonyl chloride (0.128 g, 0.50 mmol) to afford the title compound (0.1351 g). LC-MS: m/z, 421 (M+H).
Intermediate 15
1,1-dimethylethyl (2S,4R)-4-({[2-bromo-5-(trifluoromethyl)phenyl]sulfonyl}amino)-2- methyl-1 -pyrrolidinecarboxylate
Figure imgf000035_0002
Intermediate 15 was prepared using the general procedure described above for Intermediate 13, replacing 2,5-bis(methyloxy)benzenesulfonyl chloride (0.118 g, 0.50 mmol) with 2-bromo-5-(trifluoromethyl)benzenesulfonyl chloride (0.162 g, 0.50 mmol) to afford the title compound (0.1206 g). LC-MS: m/z, 487 (M+H).
Intermediate 16
1,1 -dimethylethyl (2S,4R)-4-({[2-chloro-5-(trifluoromethyl)phenyl]sulfonyl}amino)-2- methyl-1 -pyrrolidinecarboxylate
Figure imgf000036_0001
Intermediate 16 was prepared using the general procedure described above for Intermediate 13, replacing 2,5-bis(methyloxy)benzenesulfonyl chloride (0.118 g, 0.50 mmol) with 2-chloro-5-(trifluoromethyl)benzenesulfonyl chloride (0.139 g, 0.50 mmol) to afford the title compound (0.2066 g). LC-MS: m/z, 443 (M+H).
Intermediate 17
1,1 -dimethylethyl (2S,4R)-4-({[5-bromo-2-(methyloxy)phenyl]sulfonyl}amino)-2- methyl-1 -pyrrolidinecarboxylate
Figure imgf000036_0002
Intermediate 17 was prepared using the general procedure described above for
Intermediate 13, replacing 2,5-bis(methyloxy)benzenesulfonyl chloride (0.1 18 g, 0.50 mmol) with 5-bromo-2-(methyloxy)benzenesulfonyl chloride (0.143 g, 0.50 mmol) to afford the title compound (0.1285 g). LC-MS: m/z, 450 (M+H).
Intermediate 18
1,1 -dimethylethyl (2S,4R)-4-{[(5-bromo-2,4-difluorophenyl)sulfonyl]amino}-2-methyl- 1 -pyrrolidinecarboxylate
Figure imgf000036_0003
To 1 ,1-dimethylethyl (2S,4R)-4-amino-2-methyl-1-pyrrolidinecarboxylate (0.0835 g, 0.42 mmol) in DCM (~5 mL) was added a solution of 5-bromo-2,4-difluorobenzenesulfonyl chloride (0.122 g, 0.42 mmol) in DCM (~2 mL) and DIPEA (0.146 mL, 0.84 mmol). The resultant mixture was stirred at room temperature overnight, evaporated and loaded onto a 5 g silica SPE cartridge, eluting sequentially with DCM and ethyl acetate. The ethyl acetate fractions were combined and evaporated to afford the title compound (0.140 g). LC-MS: m/z, 456 (M+H).
Intermediate 19 1,1 -dimethylethyl (2S,4R)-2-methyl-4-{[(2,4,5-trifluorophenyl)sulfonyl]amino}-1- pyrrolidinecarboxylate
Figure imgf000037_0001
To 1 ,1-dimethylethyl (2S,4R)-4-amino-2-methyl-1-pyrrolidinecarboxylate (0.075 g, 0.38 mmol) in DCM (~5 mL) was added a solution of 2,4,5-trifluorobenzenesulfonyl chloride (0.075 g, 0.38 mmol) in DCM (~5 mL) and DIPEA (0.13 mL, 0.75 mmol). The resultant mixture was stirred at room temperature overnight, evaporated and loaded onto a 5 g silica SPE cartridge, eluting sequentially with DCM and ethyl acetate. The ethyl acetate fractions were combined and evaporated to afford the title compound (0.0942 g). LC-MS: m/z, 395 (M+H).
Intermediate 20
1,1 -dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2-
[(methyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000037_0002
1 ,1 -dimethylethyl (2R,4S)-4-{[(1 , 1 -dimethylethyl)(dimethyl)silyl]oxy}-2-
(hydroxymethyl)-i-pyrrolidinecarboxylate (0.170 g, 0.51 mmol) in DMF (~2 mL) was cooled down to 00C and placed under argon atmosphere. NaH (0.049 g, 2.0 mmol) and methyl iodide (0.32 mL, 5.13 mmol) were added and the resultant mixture stirred from 00C to room temperature for 5 hours. The reaction mixture was quenched with MeOH and diluted in ethyl acetate (-50 ml_). The organic layer was washed with 0.1 N HCI and NaHCO3 solution, dried over MgSO4 and concentrated to afford the title compound (0.0848 g). LC-MS: m/z, 346 (M+H).
Intermediate 21
1,1 -dimethylethyl (2R,4S)-4-hydroxy-2-[(methyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000038_0001
To 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2- [(methyloxy)methyl]-1-pyrrolidinecarboxylate (0.698 g, 2.02 mmol) in THF (-10 ml.) was added TBAF (4 ml_, 4.02 mmol) under argon atmosphere and stirred at room temperature for 4 hours. The reaction mixture was concentrated and diluted in ethyl acetate. The organic layer was washed with water (2 x 10 ml_). The aqueous layers were combined and washed again with EA (2 x 20 ml_). The organic layers were dried over MgSO4 and concentrated to afford the title compound as a yellow liquid (0.426 g). LC-MS: m/z, 232
(M+H).
Intermediate 22
1,1 -dimethylethyl (2R,4S)-2-[(methyloxy)methyl]-4-[(methylsulfonyl)oxy]-1- pyrrolidinecarboxylate
Figure imgf000038_0002
Under argon atmosphere at 00C 1 ,1-dimethylethyl (2R,4S)-4-hydroxy-2- [(methyloxy)methyl]-1 -pyrrolidinecarboxylate (0.426 g, 1.8 mmol) was diluted in DCM (-5 mL). To the resultant mixture triethylamine (0.64 mL, 4.60 mmol) and methanesulfonyl chloride (0.29 mL) were added and stirred from 00C to room temperature for 4.5 hours. The reaction mixture was concentrated and diluted in ethyl acetate and water. Both layers were separated and the organic layer was washed with 0.1 N HCI and NaHCO3 solution, dried over MgSO4 and concentrated to afford the title compound (0.5302 g). LC-MS: m/z, 310 (M+H). Intermediate 23
1,1 -dimethylethyl (2R,4R)-4-azido-2-[(methyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000039_0001
To 1 ,1-dimethylethyl (2R,4S)-2-[(methyloxy)methyl]-4-[(methylsulfonyl)oxy]-1- pyrrolidinecarboxylate (0.530 g, 1.7 mmol) in DMF (8 mL) was added NaN3 (0.445 g, 6.8 mmol) and microwaved for 1 hour at 125°C. DMF was removed under vacuum and the crude was diluted in ethyl acetate and water. Both layers were separated and the organic layer was washed with 0.1 N HCI and NaHCO3 solution, dried over MgSO4, concentrated and purified by automated flash chromatography (12 g silica cartridge) to afford the title compound as a colorless liquid (0.3013 g). LC-MS: m/z, 257 (M+H).
Intermediate 24
1,1 -dimethylethyl (2R,4R)-4-amino-2-[(methyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000039_0002
1 ,1-dimethylethyl (2R,4R)-4-azido-2-[(methyloxy)methyl]-1-pyrrolidinecarboxylate
(0.3013 g, 1.2 mmol) in MeOH (-10 mL) was hydrogenated over 10% Pd/C in a H-Cube™ reactor. The product was concentrated to afford the title compound as a colorless oil
(0.230 g). LC-MS: m/z, 231 (M+H).
Intermediate 25
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-
[(methyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000039_0003
To 1 ,1-dimethylethyl (2R,4R)-4-amino-2-[(methyloxy)methyl]-1- pyrrolidinecarboxylate (0.077 g, 0.33 mmol) in DCM (~3 mL) was added DIPEA (0.1 15 ml_, 0.66 mmol) and 2,5-dibromobenzenesulfonyl chloride (0.110 g, 0.33 mmol). The resultant mixture was stirred at room temperature overnight. The solvent was removed under vacuum and loaded onto a 5 g silica SPE cartridge, eluting sequentially with DCM and ethyl acetate. The ethyl acetate fractions were combined and evaporated to afford the title compound as a colorless oil (0.159 g). LC-MS: m/z, 529 (M+H).
Intermediate 26
1,1-dimethylethyl (2R,4R)-4-{[(2,5-dichlorophenyl)sulfonyl]amino}-2- [(methyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000040_0001
Intermediate 26 was prepared using the general procedure described above for Intermediate 25, replacing 2,5-dibromobenzenesulfonyl chloride (0.110 g, 0.33 mmol) with 2,5-dichlorobenzenesulfonyl chloride (0.081 g, 0.33 mmol) to afford the title compound as a colorless oil (0.144 g). LC-MS: m/z, 440 (M+H).
Intermediate 27
1,1-dimethylethyl (2R,4R)-4-({[2-bromo-5-(trifluoromethyl)phenyl]sulfonyl}amino)-2- [(methyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000040_0002
Intermediate 27 was prepared using the general procedure described above for
Intermediate 25, replacing 2,5-dibromobenzenesulfonyl chloride (0.110 g, 0.33 mmol) with 2-bromo-5-(trifluoromethyl)benzenesulfonyl chloride (0.107 g, 0.33 mmol) to afford the title compound as a colorless oil (0.129 g). LC-MS: m/z, 517 (M+H). Intermediate 28
1,1 -dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-
2-[(phenyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000041_0001
PPh3 (0.030 g, 0.11 mmol) was mixed with a solution of diethylazodicarboxylate
(0.020 g, 0.1 1 mmol) in CH2CI2 (-0.5 ml.) and stirred at 00C for 5 minutes. To the resultant mixture a solution of 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1- dimethylethyl)(dimethyl)silyl]oxy}-2-(hydroxymethyl)-1-pyrrolidinecarboxylate (0.025 g, 0.07 mmol, 1 eq), phenol (0.007 g, 0.07 mmol) and triethylamine (0.01 14 g, 0.1 1 mmol) in CH2CI2 (-0.5 mL) was added. The resultant mixture was stirred at room temperature overnight. To this mixture diethylazodicarboxylate (1 eq), PPh3, triethylamine and phenol (0.5 eq) were added and stirred for an additional 4 hours. The crude was concentrated and loaded onto a 5 g silica SPE cartridge, then eluted sequentially with hexane, DCM and ethyl acetate. The relevant DCM fraction was evaporated to afford the title compound (0.0084 g). LC-MS: m/z, 408 (M+H).
Intermediate 29
1,1 -dimethylethyl (2R,4S)-4-hydroxy-2-[(phenyloxy)methyl]-1-pyrrolidinecarboxylate
Figure imgf000041_0002
Under argon atmosphere in a solution of 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1- dimethylethyl)(dimethyl)silyl]oxy}-2-[(phenyloxy)methyl]-1-pyrrolidinecarboxylate (0.3955 g, 0.95 mmol) in THF (-5 mL) was added TBAF (1.9 mL, 1.90 mmol) and stirred at room temperature for 3 hours. The crude was concentrated, diluted in ethyl acetate and the organic layer was washed with water. The aqueous layer was extracted with ethyl acetate (x 2); the organic layers were combined, dried over MgSO4 and concentrated to afford the title compound (0.390 g). LC-MS: m/z, 294 (M+H). Intermediate 30
1,1 -dimethylethyl (2R,4S)-4-[(methylsulfonyl)oxy]-2-[(phenyloxy)methyl]-
1 -pyrrolidinecarboxylate
Figure imgf000042_0001
Under argon atmosphere at 00C, 1 ,1-dimethylethyl (2R,4S)-4-hydroxy-2-
[(phenyloxy)methyl]-1 -pyrrolidinecarboxylate (0.390 g, 1.3 mmol, 1 eq.) was diluted in DCM (~5 ml_). To the resulting solution was added triethylamine (0.46 ml_, 3.32 mmol) and methanesulfonyl chloride (0.2 ml_, 2.66 mmol). The resultant mixture was stirred from 00C to room temperature for 5 hours. To this mixture triethylamine (1 eq.) and methanesulfonyl chloride (1 eq.) were added at 0 0C and the mixture was stirred from 00C to room temperature overnight. To the resultant mixture, DMAP (1 eq.) was added at 00C followed by methanesulfonyl chloride (1 eq.) which was stirred for 3 hours at room temperature. To the mixture triethylamine (0.368 ml_, 2.6 mmol) and methanesulfonyl chloride (0.2 ml_, 2.58 mmol) were added at 00C and stirred overnight to room temperature. The crude was concentrated, diluted in EA (-100 ml.) and washed with 0.1 N HCI (2 x 100 ml.) and NaHCO3 solution (2 x 100 ml_). The mixture was dried over MgSO4 and concentrated under vacuum to afford the title compound (0.5267 g). LC-MS: m/z, 372 (M+H).
Intermediate 31
1,1 -dimethylethyl (2R,4R)-4-azido-2-[(phenyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000042_0002
3
Under argon atmosphere, 1 ,1-dimethylethyl (2R,4S)-4-[(methylsulfonyl)oxy]-2- [(phenyloxy)methyl]-1 -pyrrolidinecarboxylate (0.5267 g, 1.4 mmol) was diluted in acetonitrile (~7 ml_). After addition of tertbutylamino azide (0.50 g, 1.7 mmol) the resultant mixture was stirred at room temperature overnight, heated at reflux for 3 hours and stirred at room temperature over the weekend. The solvent was removed under vacuum and the resulting orange solid was diluted in ethyl acetate, washed with 0.1 N HCI and a sat. aq. NaHCO3 solution and dried over MgSO4. The organic layer was concentrated and purified by automated flash chromatography (6 g silica cartridge) to afford the title compound as (0.931 g). LC-MS: m/z, 319 (M+H).
Intermediate 32
1,1 -dimethylethyl (2R,4R)-4-amino-2-[(phenyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000043_0001
1 ,1-dimethylethyl (2R)-4-azido-2-[(phenyloxy)methyl]-1-pyrrolidinecarboxylate
(0.093 g, 0.29 mmol) in MeOH (-10 ml.) was hydrogenated over 10% Pd/C in a H-Cube™ reactor. The product was concentrated to afford the title compound as a white solid (0.0686 g). LC-MS: m/z, 293 (M+H).
Intermediate 33
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dichlorophenyl)sulfonyl]amino}- 2-[(phenyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000043_0002
To 1 ,1-dimethylethyl (2R)-4-amino-2-[(phenyloxy)methyl]-1 -pyrrolidinecarboxylate (0.0343 g, 0.12 mmol) in DCM (~1 mL) was added DIPEA (0.041 mL, 0.24 mmol) and 2,5-dichlorobenzenesulfonyl chloride (0.029 g, 0.12 mmol). The resultant mixture was stirred at room temperature overnight. The crude material was concentrated under vacuum and loaded onto a 2 g silica SPE cartridge, then eluting sequentially with DCM and ethyl acetate. The DCM fractions were combined and evaporated to afford the title compound as a colorless liquid (0.0545 g). LC-MS: m/z, 501 (M+H). Intermediate 34
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-[(phenyloxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000044_0001
Intermediate 34 was prepared using the general procedure described above for Intermediate 33, replacing 2,5-dichlorobenzenesulfonyl chloride (0.029 g, 0.12 mmol) with 2,5-dibromobenzenesulfonyl chloride (0.039 g, 0.12 mmol) to afford the title compound as a colorless liquid (0.063 g). LC-MS: m/z, 590 (M+H).
Intermediate 35
1,1-dimethylethyl (2R,4S)-4-{[(1 ,1 -dimethylethyl)(dimethyl)silyl]oxy}-2-{[(2,2- dimethylpropanoyl)oxy]methyl}-1-pyrrolidinecarboxylate
Figure imgf000044_0002
To 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2-
(hydroxymethyl)-i-pyrrolidinecarboxylate (2.0 g, 6.03 mmol, 1 eq.) in THF (-50 ml.) was added triethylamine (1.25 ml_, 9.0 mmol) and 2,2-dimethylpropanoyl chloride (0.89 ml_, 7.2 mmol). The flask was fitted with a drying flask and the reaction mixture was stirred at room temperature overnight. Triethylamine (1.5 eq.) and 2,2-dimethylpropanoyl chloride (1.2 eq) were added and the mixture was stirred at room temperature for 1 week. The crude material was concentrated under vacuum and the resulting orange solid was diluted in ethyl acetate, washed with 0.1 N HCI and a sat. aq. NaHCO3 solution dried over MgSO4 and concentrated under vacuum to afford the title compound as an orange oil (2.7732 g). LC-MS: m/z, 416 (M+H). Intermediate 36
1,1 -dimethylethyl (2R,4S)-2-{[(2,2-dimethylpropanoyl)oxy]methyl}-4-hydroxy-1 - pyrrolidinecarboxylate
Figure imgf000045_0001
To a solution of 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1- dimethylethyl)(dimethyl)silyl]oxy}-2-{[(2,2-dimethylpropanoyl)oxy]methyl}-1- pyrrolidinecarboxylate (2.5232 g, 6.07 mmol) in THF (-10 ml.) under argon atmosphere was added TBAF (12 ml_, 12 mmol). The reaction mixture was stirred at room temperature for 2.45 hours. The crude was concentrated and the resulting oil was diluted in ethyl acetate and extracted with water (3x). The organic layer was concentrated under vacuum to afford the title compound as a brown liquid (1.8895 g). LC-MS: m/z, 302 (M+H).
Intermediate 37 1,1 -dimethylethyl (2R,4S)-2-{[(2,2-dimethylpropanoyl)oxy]methyl}- 4-[(methylsulfonyl)oxy]-1 -pyrrolidinecarboxylate
Figure imgf000045_0002
To a solution of 1 ,1-dimethylethyl (2R,4S)-2-{[(2,2-dimethylpropanoyl)oxy]methyl}- 4-hydroxy-1 -pyrrolidinecarboxylate (2.1522 g, 7.1 mmol) in DCM (35 ml.) under argon atmosphere at 00C was added triethylamine (2.49 ml_, 17.9 mmol) and methanesulfonyl chloride (1.1 ml_, 14.3 mmol). The reaction mixture was stirred from 00C to room temperature for 16 hours. The solvent was removed under vacuum. The resulting orange solid was diluted in ethyl acetate, washed with 0.1 N HCI (2x) and NaHCO3 solution. The aqueous layer was dried on MgSO4, filtered and concentrated in vacuum to afford the title compound as an orange oil (2.09 g). LC-MS: m/z, 380 (M+H). Intermediate 38
1,1 -dimethylethyl (2R,4R)-4-azido-2-{[(2,2-dimethylpropanoyl)oxy]methyl}-
1 -pyrrolidinecarboxylate
Figure imgf000046_0001
To a solution of 1 ,1-dimethylethyl (2R,4S)-2-{[(2,2-dimethylpropanoyl)oxy]methyl}-
4-[(methylsulfonyl)oxy]-1-pyrrolidinecarboxylate (1 g, 2.6 mmol, 1 eq.) in acetonitrile (19 ml.) under argon atmosphere was added tertbutylamino azide (1.01 g, 3.5 mmol). The resultant mixture was heated at reflux for 2 hours and stirred at room temperature overnight. The mixture was heated at reflux for an additional 1 hour and stirred at room temperature over the weekend. The solvent was removed under vacuum and the crude was diluted in ethyl acetate, washed with 0.1 N HCI and NaHCO3 solution, dried over MgSO4 and concentrated in vacuum. Some starting material was left. To the mixture tertbutylamino azide (0.78 g, 1 eq.) in acetonitrile (10 ml.) was added and the resultant mixture was stirred at reflux for 6 hours then at room temperature overnight. The crude was processed as previously described above to afford the title compound (0.823 g). LC- MS: m/z, 327 (M+H).
Intermediate 39
1,1 -dimethylethyl (2R,4R)-4-amino-2-{[(2,2-dimethylpropanoyl)oxy]methyl}- 1 -pyrrolidinecarboxylate
Figure imgf000046_0002
A solution of 1 ,1-dimethylethyl (2R,4R)-4-azido-2-{[(2,2- dimethylpropanoyl)oxy]methyl}-1 -pyrrolidinecarboxylate (0.823 g, 2.5 mmol) in MeOH
(-20 ml.) was hydrogenated over 10% Pd/C in a H-Cube™ reactor. The crude material was concentrated under vacuum to afford the title compound (0.5659 g). LC-MS: m/z,
301 (M+H). Intermediate 40
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-{[(2,2-dimethylpropanoyl)oxy]methyl}-1-pyrrolidinecarboxylate
Figure imgf000047_0001
To 1 ,1-dimethylethyl (2R,4R)-4-amino-2-{[(2,2-dimethylpropanoyl)oxy]methyl}-1- pyrrolidinecarboxylate (0.200 g, 0.66 mmol) in DCM (10 ml.) was added DIPEA (0.23 ml_, 1.33 mmol) and 2,5-dibromobenzenesulfonyl chloride (0.022 g, 0.66 mmol). The resultant mixture was stirred at room temperature for 5 hours. The crude material was concentrated under vacuum then loaded onto a 10 g silica SPE cartridge and eluted sequentially with DCM and ethyl acetate. The ethyl acetate fractions were combined and evaporated to afford a crude residue which was diluted in ethyl acetate, washed with 0.1 N HCI and NaHCO3 solution and concentrated under vacuum to afford the title compound (0.245 g). LC-MS: m/z, 599 (M+H).
Intermediate 41
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}- 2-(hydroxymethyl)-1 -pyrrolidinecarboxylate
Figure imgf000047_0002
Method A: To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-{[(2,2- dimethylpropanoyl)oxy]methyl}-1-pyrrolidinecarboxylate ( 0.15Og, 0.25 mmol) in MeOH (1 ml) was added a 5% solution of sodium methoxide in methanol (6 ml). The resultant mixture was stirred at room temperature overnight, and then the solvent was removed under vacuum. The resulting residue was diluted with ethyl acetate then washed with 0.1 N HCI, a sat. aq. NaHCO3 solution, dried over MgSO4 and concentrated under vacuum to afford the title compound (45 mg). LC-MS: m/z, 515 (M+H).
Method B: To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-{[(2,2- dimethylpropanoyl)oxy]methyl}-1-pyrrolidinecarboxylate ( 4.09g, 6.84 mmol) in suspension in MeOH (30 ml) and water (15 ml) was added lithium hydroxide monohydrate (1.43 g, 34.2 mmol). The resultant mixture was stirred at room temperature over the week-end. The methanol was then removed under vacuum and the resulting aqueous layer was diluted in ethyl acetate. The organic layer was separated then washed with 0.1 N HCI, a sat. aq. NaHCO3 solution, dried over MgSO4 and concentrated under vacuum to afford the title compound (3.52 g). LC-MS: m/z, 515 (M+H).
Intermediate 42 1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dichlorophenyl)sulfonyl]amino}- 2-{[(2,2-dimethylpropanoyl)oxy]methyl}-1-pyrrolidinecarboxylate
Figure imgf000048_0001
To 1 ,1-dimethylethyl (2R,4R)-4-amino-2-{[(2,2-dimethylpropanoyl)oxy]methyl}-1- pyrrolidinecarboxylate (0.100 g, 0.33 mmol) in DCM (3 mL) was added DIEA (0.12 mL, 0.66 mmol) and 2,5-dichlorobenzenesulfonyl chloride (0.082 g, 0.33 mmol). The resultant mixture was stirred at room temperature for 3 hours. The crude was washed with 0.1 N HCI and NaHCO3 solution and concentrated under vacuum to afford the title compound (0.157 g). LC-MS: m/z, 510 (M+H).
Intermediate 43
1,1 -dimethylethyl (2R,4R)-4-({[5-chloro-2-(methyloxy)phenyl]sulfonyl}amino)-
2-{[(2,2-dimethylpropanoyl)oxy]methyl}-1-pyrrolidinecarboxylate
Figure imgf000049_0001
Intermediate 43 was prepared using the general procedure described above for
Intermediate 42, replacing 2,5-dichlorobenzenesulfonyl chloride (0.082 g, 0.33 mmol) with 5-chloro-2-(methyloxy)benzenesulfonyl chloride (0.080 g, 0.33 mmol) to afford the title compound (0.133 g). LC-MS: m/z, 506 (M+H).
Intermediate 44
1,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}- 2-({[(phenylamino)carbonyl]oxy}methyl)-1-pyrrolidinecarboxylate
Figure imgf000049_0002
To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-
(hydroxymethyl)-i-pyrrolidinecarboxylate (0.075 g, 0.146 mmol) in DCM (1 ml.) was added NEt3 (21 μl_, 0.15 mmol) and isocyanatobenzene (17 μl_, 0.16 mmol). The resultant mixture was stirred at room temperature for 2 hours then diluted in DCM, washed with water, 0.1 N HCI, and a sat. aq. NaHCOs solution and concentrated under vacuum to afford the title compound (0.060 g). LC-MS: m/z, 633 (M+H). Intermediate 45
1,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}- 2-[({[(phenylmethyl)amino]carbonyl}oxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000050_0001
To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-
(hydroxymethyl)-i-pyrrolidinecarboxylate (0.075 g, 0.146 mmol, 1eq.) in DCM (1 ml.) was added NEt3 (0.0203 ml_, 0.146 mmol). To the resultant mixture was added (isocyanatomethyl)benzene (0.0214 g, 0.16 mmol) in DCM (1.5 ml.) and it was stirred at room temperature for 4 hours. To this mixture NEt3 (1 eq.) and (isocyanatomethyl)benzene (1 eq.) were added and it was stirred at room temperature overnight. The crude was diluted in DCM, and then washed with water, 0.1 N HCI and a sat. aq. NaHCO3 solution. Both layers were separated using a hydrophobic frit and the organic layer was concentrated under vacuum. The resulting crude material was loaded onto a 12 g silica SPE cartridge, and eluted sequentially with DCM ether and ethyl acetate. The relevant fractions were evaporated to afford the title compound (0.0723 g). LC-MS: m/z, 648 (M+H).
Intermediate 46
1,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-({[({[2- (methyloxy)phenyl]methyl}amino)carbonyl]oxy}methyl)-1-pyrrolidinecarboxylate
Figure imgf000050_0002
Intermediate 46 was prepared using the general procedure described above for Intermediate 45, replacing (isocyanatomethyl)benzene (0.0214 g, 0.16 mmol) with 1- (isocyanatomethyl)-2-(methyloxy)benzene (0.0262 g, 0.16 mmol) to afford the title compound (0.0846 g). LC-MS: m/z, 678 (M+H). Intermediate 47
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-({[({[4-(methyloxy)phenyl]methyl}amino)carbonyl]oxy}methyl)-
1 -pyrrolidinecarboxylate
Figure imgf000051_0001
Intermediate 47 was prepared using the general procedure described above for Intermediate 45, replacing (isocyanatomethyl)benzene (0.0214 g, 0.16 mmol) with 1- (isocyanatomethyl)-4-(methyloxy)benzene (0.0229 ml_, 0.16 mmol) to afford the title compound (0.0788 g). LC-MS: m/z, 678 (M+H).
Intermediate 48
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-{[({[2-
(methyloxy)phenyl]amino}carbonyl)oxy]methyl}-1 -pyrrolidinecarboxylate
Figure imgf000051_0002
Intermediate 48 was prepared using the general procedure described above for Intermediate 45, replacing (isocyanatomethyl)benzene (0.0214 g, 0.16 mmol) with 1- isocyanato-2-(methyloxy)benzene (0.0226 ml_, 0.16 mmol) to afford the title compound (0.0919 g). LC-MS: m/z, 664 (M+H).
Intermediate 49
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-{[({[3- (methyloxy)phenyl]amino}carbonyl)oxy]methyl}-1 -pyrrolidinecarboxylate
Figure imgf000051_0003
Intermediate 49 was prepared using the general procedure described above for Intermediate 45, replacing (isocyanatomethyl)benzene (0.0214 g, 0.16 mmol) with 1- isocyanato-3-(methyloxy)benzene (0.021 1 ml_, 0.16) to afford the title compound (0.1028 g). LC-MS: m/z, 664 (M+H).
Intermediate 50
1,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-{[({[4- (methyloxy)phenyl]amino}carbonyl)oxy]methyl}-1-pyrrolidinecarboxylate
Figure imgf000052_0001
Intermediate 50 was prepared using the general procedure described above for
Intermediate 45, replacing (isocyanatomethyl)benzene (0.0214 g, 0.16 mmol) with 1- isocyanato-4-(methyloxy)benzene (0.0209 ml_, 0.16 mmol) to afford the title compound (0.0729 g). LC-MS: m/z, 664 (M+H).
Intermediate 51
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-{[({[2- (trifluoromethyl)phenyl]amino}carbonyl)oxy]methyl}-1 -pyrrolidinecarboxylate
Figure imgf000052_0002
Intermediate 51 was prepared using the general procedure described above for Intermediate 45, replacing (isocyanatomethyl)benzene (0.0214 g, 0.16 mmol) with 1- isocyanato-2-(trifluoromethyl)benzene (0.0300 g, 0.16 mmol) to afford the title compound (0.0919 g). LC-MS: m/z, 702 (M+H). Intermediate 52
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-{[({[3-
(trifluoromethyl)phenyl]amino}carbonyl)oxy]methyl}-1 -pyrrolidinecarboxylate
Figure imgf000053_0001
Intermediate 52 was prepared using the general procedure described above for Intermediate 45, replacing (isocyanatomethyl)benzene (0.0214 g, 0.16 mmol) with 1- isocyanato-3-(trifluoromethyl)benzene (0.0300 g, 0.16 mmol) to afford the title compound (0.1214 g). LC-MS: m/z, 702 (M+H).
Intermediate 53
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-{[({[4-
(trifluoromethyl)phenyl]amino}carbonyl)oxy]methyl}-1 -pyrrolidinecarboxylate
Figure imgf000053_0002
To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-
(hydroxymethyl)-i-pyrrolidinecarboxylate (0.1 g, 0.194 mmol) in DCM (1 ml.) was added NEt3 (0.0271 ml_, 0.194 mmol). To the resultant mixture was added 1-isocyanato-4- (trifluoromethyl)benzene (0.0400 g, 0.21 mmol) in DCM (1.5 ml_). The reaction mixture was stirred at room temperature overnight then it was loaded onto a 2 g silica SPE cartridge, and eluted sequentially with DCM ether and ethyl acetate. The relevant fractions were evaporated to afford the title compound (0.1404 g). LC-MS: m/z, 702 (M+H). Intermediate 54
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-[({[(2- methylphenyl)amino]carbonyl}oxy)methyl]-1-pyrrolidinecarboxylate
Figure imgf000054_0001
Intermediate 54 was prepared using the general procedure described above for Intermediate 53, replacing 1-isocyanato-4-(trifluoromethyl)benzene (0.0400 g, 0.21 mmol) with 1-isocyanato-2-methylbenzene (0.0265 ml_, 0.214 mmol) to afford the title compound (0.0178 g). LC-MS: m/z, 648 (M+H).
Intermediate 55
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-[({[(3-methylphenyl)amino]carbonyl}oxy)methyl]-1-pyrrolidinecarboxylate
Figure imgf000054_0002
Intermediate 55 was prepared using the general procedure described above for Intermediate 53, replacing 1-isocyanato-4-(trifluoromethyl)benzene (0.0400 g, 0.21 mmol) with 1-isocyanato-3-methylbenzene (0.0285 g, 0.21 mmol) to afford the title compound (0.1203 g). LC-MS: m/z, 648 (M+H).
Intermediate 56
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}- 2-({[(1 -naphthalenylamino)carbonyl]oxy}methyl)-1-pyrrolidinecarboxylate
Figure imgf000054_0003
Intermediate 56 was prepared using the general procedure described above for Intermediate 53, replacing 1-isocyanato-4-(trifluoromethyl)benzene (0.0400 g, 0.21 mmol) with 1-isocyanatonaphthalene (0.0362 g, 0.21 mmol) to afford the title compound (0.1203 g). LC-MS: m/z, 684 (M+H).
Intermediate 57
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-({[(2-naphthalenylamino)carbonyl]oxy}methyl)-1-pyrrolidinecarboxylate
Figure imgf000055_0001
Intermediate 57 was prepared using the general procedure described above for
Intermediate 53, replacing 1-isocyanato-4-(trifluoromethyl)benzene (0.0400 g, 0.21 mmol) with 2-isocyanatonaphthalene (0.0362 g, 0.21 mmol) to afford the title compound (0.1 179 g). LC-MS: m/z, 684 (M+H).
Intermediate 58
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-({[(ethylamino)carbonyl]oxy}methyl)-1-pyrrolidinecarboxylate
Figure imgf000055_0002
Intermediate 58 was prepared using the general procedure described above for Intermediate 53, replacing 1-isocyanato-4-(trifluoromethyl)benzene (0.0400 g, 0.21 mmol) with isocyanatoethane (0.0152 g, 0.21 mmol) to afford the title compound (0.1132 g). LC- MS: m/z, 586 (M+H). Intermediate 59
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-[({[(1,1-dimethylethyl)amino]carbonyl}oxy)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000056_0001
To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-
(hydroxymethyl)-i-pyrrolidinecarboxylate (0.1 g, 0.194 mmol, 1 eq) in DCM (1 ml.) was added NEt3 (0.0271 ml_, 0.194 mmol). To the resultant mixture was added 1-isocyanato-4- (trifluoromethyl)benzene (0.0400 g, 0.21 mmol) in DCM (1.5 ml.) and the mixture was stirred at room temperature overnight. NEt3 (4 eq) were added and the reaction was heated at 40 0C for 2 h. The reaction mixture was then concentrated under vacuum and was loaded onto a 2 g silica SPE cartridge, eluting sequentially with DCM ether and ethyl acetate. The relevant fractions were evaporated to afford the title compound (0.1116 g). LC-MS: m/z, 614 (M+H).
Intermediate 60
1,1 -dimethylethyl (2R,4R)-2-({[(cyclohexylamino)carbonyl]oxy}methyl)- 4-{[(2,5-dibromophenyl)sulfonyl]amino}-1 -pyrrolidinecarboxylate
Figure imgf000056_0002
Intermediate 60 was prepared using the general procedure described above for Intermediate 53, replacing 1-isocyanato-4-(trifluoromethyl)benzene (0.0400 g, 0.21 mmol) with isocyanatocyclohexane (0.0268 g, 0.21 mmol) to afford the title compound (0.1013 g). LC-MS: m/z, 640 (M+H). Intermediate 61
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl {[2-(methyloxy)phenyl]methyl}carbamate
Figure imgf000057_0001
To Intermediate 46 (0.0846 g, 0.125 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.70 mL) for 2 hours. The solvent was removed under vacuum to afford the title compound (0.0752 g). LC-MS: m/z, 578 (M+H).
Intermediate 62
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl {[3-
(methyloxy)phenyl]methyl}carbamate
Figure imgf000057_0002
To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2- (hydroxymethyl)-i-pyrrolidinecarboxylate (0.075 g, 0.146 mmol, 1eq.) in DCM (1 mL) was added NEt3 (0.0203 mL, 0.146 mmol). To the resultant mixture was added 1-
(isocyanatomethyl)-3-(methyloxy)benzene (0.0262 g, 0.16 mmol) in DCM (1.5 mL) and stirred at room temperature for 4 hours. To this mixture NEt3 (1 eq.) and
(isocyanatomethyl)benzene (1 eq.) were added and stirred at room temperature overnight. The reaction mixture was diluted in DCM, washed with water, 0.1 N HCI, then a sat. aq.
NaHCO3 solution. Both layers were separated using a hydrophobic frit and the organic layer was concentrated under vacuum. To the resulting crude residue in dioxane (0.5 mL) was added 4 N HCI (0.70 mL). After stirring the reaction mixture for two hours, the solvent was removed under vacuum to afford the title compound (0.08 g). LC-MS: m/z, 578 (M+H). Intermediate 63
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
{[4-(methyloxy)phenyl]methyl}carbamate
Figure imgf000058_0001
To Intermediate 47 (0.0788 g, 0.1 16 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.70 mL) for 2 hours. The solvent was removed under vacuum to afford the title compound (0.0556 g). LC-MS: m/z, 578 (M+H).
Intermediate 64
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl [2-
(methyloxy)phenyl]carbamate
Figure imgf000058_0002
To Intermediate 48 (0.0919 g, 0.139 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.70 mL) for 2 hours. The solvent was removed under vacuum and was loaded onto a 2 g silica SPE cartridge, then eluted sequentially with DCM ether and EA. The relevant fractions were combined and evaporated to afford the title compound (0.0304 g). LC-MS: m/z, 564 (M+H).
Intermediate 65 ((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl [3-(methyloxy)phenyl]carbamate
Figure imgf000058_0003
To Intermediate 49 (0.1028 g, 0.155 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.70 mL) for 2 hours. The solvent was removed under vacuum and was loaded onto a 2 g silica SPE cartridge, then eluted sequentially with DCM ether and ethyl acetate. The relevant fractions were evaporated to afford the title compound (0.0496 g). LC-MS: m/z, 564 (M+H).
Intermediate 66
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
[4-(methyloxy)phenyl]carbamate
Figure imgf000059_0001
To Intermediate 50 (0.0729 g, 0.1 1 mmol) in dioxane (0.5 ml.) was added 4 N HCI (0.70 ml.) and the resulting mixture was stirred for 2 hours. The solvent was removed under vacuum to afford the title compound (0.0395 g). LC-MS: m/z, 564 (M+H).
Intermediate 67
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
[2-(trifluoromethyl)phenyl]carbamate
Figure imgf000059_0002
To Intermediate 51 (0.0919 g, 0.131 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.70 mL) for 2 hours. The solvent was removed under vacuum to afford the title compound (0.069 g). LC-MS: m/z, 602 (M+H).
Intermediate 68
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl [3-(trifluoromethyl)phenyl]carbamate
Figure imgf000059_0003
To Intermediate 52 (0.1214 g, 0.173 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.70 mL) and the resulting mixture was stirred for 2 hours. The solvent was removed under vacuum to afford the title compound (0.0746 g). LC-MS: m/z, 602 (M+H).
Intermediate 69
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
[4-(trifluoromethyl) LL LLhenyl]carbamate
Figure imgf000060_0001
To Intermediate 54 (0.1404 g, 0.2 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.9 mL) and the resulting mixture was stirred for 2 hours. The solvent was removed under vacuum to afford the title compound (0.0829 g). LC-MS: m/z, 602 (M+H).
Intermediate 70
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl (3-methylphenyl)carbamate
Figure imgf000060_0002
To Intermediate 55 (0.1363 g, 0.211 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.9 mL) and the resulting mixture was stirred for 2 hours. The solvent was removed under vacuum to afford the title compound (0.0697 g). LC-MS: m/z, 548 (M+H).
Intermediate 71
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl 1 -naphthalenyl carbamate
Figure imgf000060_0003
To Intermediate 56 (0.1203 g, 0.176 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.9 mL) and the resulting mixture was stirred for 2 hours. The solvent was removed under vacuum to afford the title compound (0.1 157 g). LC-MS: m/z, 584 (M+H).
Intermediate 72
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
2-naphthalenylcarbamate
Figure imgf000061_0001
To Intermediate 57 (0.1 179 g, 0.173 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.9 mL) and the resulting mixture was stirred for 2 hours. The solvent was removed under vacuum to afford the title compound (0.0879 g). LC-MS: m/z, 584 (M+H).
Intermediate 73
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl ethyl carbamate
Figure imgf000061_0002
To Intermediate 58 (0.1 132 g, 0.193 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.9 mL) and the resulting mixture was stirred for 2 hours. The solvent was removed under vacuum to afford the title compound (0.0871 g). LC-MS: m/z, 486 (M+H).
Intermediate 74
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
(1 ,1-dimethylethyl)carbamate
Figure imgf000061_0003
To Intermediate 59 (0.1 116 g, 0.182 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.9 mL) and the resulting mixture was stirred for 2 hours. The solvent was removed under vacuum to afford the title compound (0.253 g). LC-MS: m/z, 514 (M+H).
Intermediate 75
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl cyclohexylcarbamate
Figure imgf000062_0001
To Intermediate 60 (0.1013 g, 0.158 mmol) in dioxane (0.5 mL) was added 4 N HCI (0.9 mL) and the resulting mixture was stirred for 2 hours. The solvent was removed under vacuum to afford the title compound (0.0843 g). LC-MS: m/z, 540 (M+H).
Intermediate 76
1,1 -dimethylethyl (2S,4R)-4-{[(2,5-dibromo-3,6-difluorophenyl)sulfonyl]amino}- 2-methyl-1 -pyrrolidinecarboxylate
Figure imgf000062_0002
To 1 ,1-dimethylethyl (2S,4R)-4-amino-2-methyl-1 -pyrrolidinecarboxylate (100 mg, 0.5 mmol) in DCM (4 mL) was added 2,5-dibromo-3,6-difluorobenzenesulfonyl chloride (222 mg, 0.6 mmol) and DIEA (129 mg, 1 mmol). The reaction mixture was stirred at room temperature over the weekend and washed with 1 N HCI and saturated NaHCO3. The DCM layer was isolated and loaded onto a 20 g amino SPE cartridge then eluted sequentially with DCM and ethyl acetate. The ethyl acetate fractions were combined and evaporated to afford the title compound as a pale yellow oil (263 mg). LC-MS: m/z, 533 (M+H). Intermediate 77
1,1 -dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2-
[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000063_0001
To 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2- (hydroxymethyl)-i-pyrrolidinecarboxylate (331 mg, 1.0 mmol) in THF (5 ml.) was added under argon 1 H-isoindole-1 ,3(2H)-dione (aka phthalimide, 164 mg, 1.1 mmol) and triphenylphosphane (288 mg, 1.1 mmol). The reaction mixture was stirred for 5 minutes followed by the dropwise addition of diethyl azodicarboxylate (191 mg, 1.1 mmol). The resultant mixture was stirred at room temperature overnight, quenched with brine (10 ml.) and diluted with diethyl ether. The ether layer was dried (Na2SO4), evaporated and purified by automated flash chromatography (12 g silica cartridge) to afford the title compound as a colorless oil (-380 mg). LC-MS: m/z, 461 (M+H).
Intermediate 78
1,1 -dimethylethyl (2R,4S)-2-[(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)methyl]-
4-hydroxy-1 -pyrrolidinecarboxylate
Figure imgf000063_0002
To 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2-[(1 ,3- dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate (2.11 g, 4.59 mmol) in THF (50 ml.) at 0 0C was added a tetra-n-butylammonium fluoride solution in THF, (1 M, 7 ml_, 7 mmol ) dropwise. The reaction mixture was stirred at 00C for 1 hour followed by addition of water. The organic layer was separated and washed with brine. The aqueous layers were combined and extracted with ethyl acetate. The combined organic layers were dried over Na2SO4 and evaporated to give a crude material, which was purified by loading it onto a SPE cartridge (20 g silica cartridge) and eluting sequentially with DCM and ethyl acetate. The relevant fractions were combined and evaporated to afford the title compound as a white solid (-1.58 g). Intermediate 79
1,1 -dimethylethyl (2R,4S)-2-[(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)methyl]-
4-[(methylsulfonyl)oxy]-1 -pyrrolidinecarboxylate
Figure imgf000064_0001
To 1 1 ,1-dimethylethyl (2R,4S)-2-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]-4- hydroxy-1-pyrrolidinecarboxylate (1.58 g, 4.56 mmol) in DCM (20 ml.) were added triethylamine (2.0 ml_, 14.4 mmol) and 4-(dimethylamino)pyridine (840 mg, 6.9 mmol). To the resultant mixture was added dropwise methanesulfonyl chloride (540 μl_, 6.9 mmol) at 00C while stirring. The resultant mixture was stirred under argon overnight, then diluted with ethyl acetate, and washed sequentially with 1 N HCI and a sat. aq. NaHCO3 solution. After drying over Na2SO4 , the solution was evaporated to afford the title compound as a white solid (-1.96 g). LC-MS: m/z, 425 (M+H).
Intermediate 80
1,1 -dimethylethyl (2R,4R)-4-azido-2-[(1 ,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)methyl]- 1 -pyrrolidinecarboxylate
Figure imgf000064_0002
To 1 ,1-dimethylethyl (2R,4S)-2-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]-4- [(methylsulfonyl)oxy]-1-pyrrolidinecarboxylate (1.96 g, 4.62 mmol) in CH3CN (30 ml.) was added tetrabutylammonium azide (1.97 g, 6.93 mmol) in CH3CN (2 ml.) while stirring. The reaction mixture was stirred at room temperature overnight and refluxed for 3 hours. The mixture was refluxed for an additional 1 hour, evaporated and purified by automated flash chromatography (40 g silica cartridge) to afford the title compound as a white solid (1.37 g). Intermediate 81
1,1 -dimethylethyl (2R,4R)-4-amino-2-[(1,3-dioxo-1 ,3-dihydro-2H-isoindol-2- yl)methyl]-1-pyrrolidinecarboxylate
Figure imgf000065_0001
To 1 ,1-dimethylethyl (2R,4R)-4-azido-2-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2- yl)methyl]-1-pyrrolidinecarboxylate (1.37 g, 3.7 mmol) in MeOH (75 ml.) was hydrogenated in a H-cube™ reactor (10% Pd/C cartridge) at room temperature to afford the title compound as a white solid (-1.15 g).
Intermediate 82
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000065_0002
To 1 ,1-dimethylethyl (2R,4R)-4-amino-2-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2- yl)methyl]-1-pyrrolidinecarboxylate (1.15 g, 3.33 mmol) in DCM (4 ml.) was added 2,5- dibromo-3,6-difluorobenzenesulfonyl chloride (1.11 g, 3.33 mmol) and DIEA (859 mg, 6.66 mmol). The reaction mixture was stirred at room temperature over the weekend and washed with 1 N HCI then a sat. aq. NaHCO3 solution. The DCM layer was isolated and evaporated under vacuum. The residue was purified by automated flash chromatography (40 g silica catridge) to afford the title compound as a white solid (-1.73 g). LC-MS: m/z, 644 (M+H). Intermediate 83
1,1 -dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
1 -pyrrolidinecarboxylate
Figure imgf000066_0001
To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-[(1 ,3-dioxo-
1 ,3-dihydro-2H-isoindol-2-yl)methyl]-1 -pyrrolidinecarboxylate (1.57 g, 2.44 mmol) in EtOH (40 ml.) was added hydrazine hydrate (500 mg, 10 mmol). The reaction mixture was refluxed for 2 hours. The by-product was filtered off, and the filtrated was concentrated and purified by preparatory HPLC (without TFA) to afford the title compound as a white solid (-853 mg). LC-MS: m/z, 514 (M+H).
Intermediate 84
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-
{[(phenylcarbonyl)amino]methyl}-1 -pyrrolidinecarboxylate
Figure imgf000066_0002
To 1 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5- dibromophenyl)sulfonyl]amino}-1 -pyrrolidinecarboxylate (50 mg, 0.1 mmol) in DCM (3 mL) was added TEA (20 mg, 0.2 mmol) and benzoyl chloride (15 mg, 0.1 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N HCI and the DCM layer was isolated and evaporated to afford the title compound. Intermediate 85
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-{[(2,2- dimethylpropanoyl)amino]methyl}-1-pyrrolidinecarboxylate
Figure imgf000067_0001
To 1 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5- dibromophenyl)sulfonyl]amino}-1-pyrrolidinecarboxylate (50 mg, 0.1 mmol) in DCM (3 ml.) was added TEA (20 mg, 0.2 mmol) and 2,2-dimethylpropanoyl chloride (12 mg, 0.1 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N HCI and the DCM layer was isolated and evaporated to afford the title compound.
Intermediate 86
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-
{[(phenylacetyl)amino]methyl}-1-pyrrolidinecarboxylate
Figure imgf000067_0002
Intermediate 86 was prepared using the general procedure described above for Intermediate 84, replacing benzoyl chloride (15 mg, 0.1 mmol) with phenylacetyl chloride (31 mg, 0.2 mmol) to afford the title compound.
Intermediate 87
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}- 2-({[(3-methylphenyl)carbonyl]amino}methyl)-1-pyrrolidinecarboxylate
Figure imgf000067_0003
Intermediate 87 was prepared using the general procedure described above for Intermediate 84, replacing benzoyl chloride (15 mg, 0.1 mmol) with 3-methylbenzoyl chloride (31 mg, 0.2 mmol) to afford the title compound.
Intermediate 88
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-[({[2-(methyloxy)phenyl]carbonyl}amino)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000068_0001
Intermediate 88 was prepared using the general procedure described above for Intermediate 84, replacing benzoyl chloride (15 mg, 0.1 mmol) with 2-(methyloxy)benzoyl chloride (34 mg, 0.2 mmol) to afford the title compound.
Intermediate 89
1,1 -dimethylethyl formate - N-[((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-1- methyl^-pyrrolidinyljmethyllcyclohexanecarboxamide (1 :1)
Figure imgf000068_0002
Intermediate 89 was prepared using the general procedure described above for Intermediate 84, replacing benzoyl chloride (15 mg, 0.1 mmol) with cyclohexanecarbonyl chloride (29 mg, 0.2 mmol) to afford the title compound.
Intermediate 90
1,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-{[(2-thienylcarbonyl)amino]methyl}-1 -pyrrolidinecarboxylate
Figure imgf000068_0003
Intermediate 90 was prepared using the general procedure described above for Intermediate 84, replacing benzoyl chloride (15 mg, 0.1 mmol) with 2-thiophenecarbonyl chloride (29 mg, 0.2 mmol) to afford the title compound.
Intermediate 91 1,1-dimethylethyl (2S,4R)-4-({[5-chloro-2-
(methyloxy)phenyl]sulfonyl}amino)-2-methyl-1- pyrrolidinecarboxylate
Figure imgf000069_0001
To 1 ,1-dimethylethyl (2S,4R)-4-amino-2-methyl-1-pyrrolidinecarboxylate (30 mg, 0.15 mmol) in DCM (20 ml.) was added triethylamine (0.1 ml_). The reaction mixture was chilled down to 00C, then 5-chloro-2-(methyloxy)benzenesulfonyl chloride (40 mg, 0.16 mmol) was added. After stirring overnight, the reaction mixture was treated with water.
After stirring for 5 minutes, the organic phase was isolated through a phase separator then concentrated under vacuum to afford the title compound (93.7 mg). LC-MS: m/z, 405.1 (M+H), rt 2.15 min.
Intermediate 92 1,1 -dimethylethyl (2S,4R)-4-{[(2,5- dimethylphenyl)sulfonyl]amino}-2-methyl-1- pyrrolidinecarboxylate
Figure imgf000069_0002
To 1 ,1-dimethylethyl (2S,4R)-4-amino-2-methyl-1-pyrrolidinecarboxylate (30 mg, 0.15 mmol) in DCM (20 ml.) was added triethylamine (0.1 ml_). The resulting mixture was chilled down to 00C then 2,5-dimethylbenzenesulfonyl chloride (34 mg, 0.17 mmol) was added. After stirring for 3 hours the reaction mixture was treated with water. After stirring for 5 minutes, the organic phase was isolated through a phase separator then concentrated under vacuum to afford the title compound (1 10.7 mg). LC-MS: m/z, 369 (M+H), rt 2.16 min. Intermediate 93 1,1 -dimethylethyl (2S,4R)-2-methyl-4-({[3- (trifluoromethyl)phenyl]sulfonyl}amino)-1- pyrrolidinecarboxylate
Figure imgf000070_0001
To 1 ,1-dimethylethyl (2S,4R)-4-amino-2-methyl-1-pyrrolidinecarboxylate (30 mg, 0.15 mmol) in DCM (20 ml.) was added triethylamine (0.1 ml_). The reaction mixture was chilled down to 00C then 3-(trifluoromethyl)benzenesulfonyl chloride (40 mg, 0.16 mmol) was added. After stirring for 3 hours the reaction mixture was treated with water. After stirring for 5 minutes, the organic phase was isolated through a phase separator then concentrated under vacuum to afford the title compound (104 mg). LC-MS: m/z, 409 (M+H), rt 2.17 min.
Intermediate 94 2,5-dibromo-4-fluoro-N-[(3R,5S)-5-methyl-3- pyrrolidinyljbenzenesulfonamide
Figure imgf000070_0002
1 ,4-dibromo-2-fluorobenzene (5 g, 19.7 mmol) was added portionwise to a solution of CISO3H (4 ml_, 20 mmol) in 1 ,2 dicloroethane (9 ml.) at 00C. The reaction mixture was warmed to room temperature and stirred for 4 hours. The resultant mixture was cooled to 00C, diluted with hexane (20 ml.) and water (10 ml.) was added with caution. The organic layer was separated, washed with brine, dried and evaporated to afford the title compound as a crude oil (3.10 g).
To the crude oil previously prepared in DCM (5 ml.) and TEA (208 μl_) was added 1 ,1-dimethylethyl (2S,4R)-4-amino-2-methyl-1-pyrrolidinecarboxylate (100 mg, 0.50 mmol) at room temperature. The solvent was evaporated under vacuum to give a crude oil that was treated with 4 N HCI in dioxane (6 ml). The residue was redissolved in water (100 ml_), washed with ether (100 ml. x 2) and basified to pH 13 with 6N NaOH. The resultant mixture was extracted with EA (3 x 70 ml_), dried over MgSO4 and evaporated to afford the title compound as a brown solid (260 mg). LC-MS: m/z, 417 (M+H), rt 1.33 min Intermediate 95 1,1-Dimethylethyl (2R,4R)-4-{[(2,5- dichlorophenyl)sulfonyl]amino}-2-[(1 ,3-dioxo-1 ,3-dihydro-2H- isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate
Figure imgf000071_0001
To 1 ,1 -dimethylethyl (2R,4R)-4-amino-2-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]- 1-pyrrolidinecarboxylate (600 mg, 1.74 mmol) in DCM (15 ml.) was added 2,5- dichlorobenzenesulfonyl chloride (448 mg, 1.83 mmol) and DIEA (0.6 ml, 3.5 mmol). The reaction mixture was stirred at room temperature for 2h and washed with 1 N HCI. The DCM layer was isolated, dried (MgSO4) and evaporated. The residue was purified by automated flash chromatography (40 g silica cartridge) to afford the title compound as a white solid (-0.8 g). LC-MS: m/z, 556 (M+H), rt 2.30 min.
Intermediate 96 1 ,1 -Dimethylethyl (2/?,4/?)-4-({[5-chloro-2-(methyloxy) phenyl]sulfonyl}amino)-2-[(1,3-dioxo-1,3-dihydro-2H- isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate
Figure imgf000071_0002
To 1 ,1 -dimethylethyl (2R,4R)-4-amino-2-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]- 1-pyrrolidinecarboxylate (300 mg, 1.74 mmol) in DCM (5 ml.) was added and TEA (0.242 ml_, 1.737 mmol) followed by 2-methoxy-5-chlorobenzenesulfonyl chloride (209 mg, 0.869 mmol). The reaction mixture was stirred at room temperature overnight. The mixture was diluted with DCM and washed with 1 N HCI and saturated NaHCOs. The DCM layer was isolated, dried (Na2SO4) and evaporated. The residue was purified by automated flash chromatography (12 g silica cartridge) to afford the title compound (400 mg). LC-MS: m/z, 550 (M+H), rt 1.15 min.
Intermediate 97 1 ,1 -Dimethylethyl (2/?,4/?)-4-({[5-bromo-2-(methyloxy) phenyl]sulfonyl}amino)-2-[(1 ,3-dioxo-1 ,3-dihydro-2H- isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate
Figure imgf000072_0001
To 1 ,1 -dimethylethyl (2R,4R)-4-amino-2-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]- 1-pyrrolidinecarboxylate (300 mg, 1.74 mmol) in DCM (5 ml.) was added and TEA (0.242 ml_, 1.737 mmol) followed by 2-methoxy-5-bromobenzenesulfonyl chloride (248 mg, 0.869 mmol). The reaction mixture was stirred at room temperature overnight. The mixture was diluted with DCM and washed with 1 N HCI and saturated NaHCO3. The DCM layer was isolated, dried (Na2SO4) and evaporated. The residue was purified by automated flash chromatography (12 g silica cartridge) to afford the title compound (420 mg). LC-MS: m/z, 596 (M+H), rt 1.17 min.
Intermediate 98 1 ,1 -Dimethylethyl (2R,4R)-4-({[2,5-bis(methyloxy) phenyl]sulfonyl}amino)-2-[(1 ,3-dioxo-1 ,3-dihydro-2H- isoindol-2-yl)methyl]-1 -pyrrolidinecarboxylate
Figure imgf000072_0002
To 1 ,1 -dimethylethyl (2R,4R)-4-amino-2-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]-
1-pyrrolidinecarboxylate (300 mg, 1.74 mmol) in DCM (5 mL) was added and TEA (0.242 mL, 1.737 mmol) followed by 2,5-dimethoxybenzenesulfonyl chloride (206 mg, 0.869 mmol). The reaction mixture was stirred at room temperature overnight. The mixture was diluted with DCM and washed with 1 N HCI and saturated NaHCO3. The DCM layer was isolated, dried (MgSO4) and evaporated. The residue was purified by automated flash chromatography (12 g silica cartridge) to afford the title compound (388 mg). LC-MS: m/z, 546 (M+H), rt 1.05 min.
Intermediate 99 1 ,1 -Dimethylethyl (2R,4R)-4-[{[5-bromo-2-(methyloxy) phenyl]sulfonyl}(phenylmethyl)amino]-2-[(1 ,3-dioxo-1 ,3- dihydro-2H-isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate
Figure imgf000073_0001
To a solution of 1 ,1 -dimethylethyl (2/?,4/?)-4-({[5-bromo-2-(methyloxy)phenyl] sulfonyl}amino)-2-[(1 ,3-dioxo-1 ,3-dihydro-2/-/-isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate
(241 mg, 0.405 mmol) in DMF (5 ml), was added cesium carbonate (264 mg, 0.81 1 mmol) followed by benzyl bromide (0.072 ml, 0.608 mmol). The reaction mixture was stirred at room temperature overnight. The solvent was removed under vacuum and the residue was dissolved in ethyl acetate and water. The ethyl acetate layer was dried and concentrated to give crude as yellow oil, which was purified by automated flash chromatograph (12 g Silica cartridge) to afford the title compound (244 mg, 88%). LC-MS: m/z, 684 (M+H), rt 1.34 min.
Intermediate 100 1,1 -Dimethylethyl (2/?,4/?)-4-[{[2,5-bis(methyloxy)phenyl] sulfonyl}(phenylmethyl)amino]-2-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]-1 - pyrrolidinecarboxylate
Figure imgf000074_0001
To a solution of 1 ,1-dimethylethyl (2/?,4/?)-4-({[2,5-bis(methyloxy)phenyl]sulfonyl} amino)- 2-[(1 ,3-dioxo-1 ,3-dihydro-2/-/-isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate (340 mg, 0.623 mmol) in DMF (5 ml), was added cesium carbonate (406 mg, 1.246 mmol) followed by benzyl bromide (0.11 1 ml, 0.935 mmol). The reaction mixture was stirred at room temperature overnight. Remove solvent under vacuum and the residue was dissolved in ethyl acetate and water. The ethyl acetate layer was dried and concentrated to give crude as yellow oil, which was purified by automated flash chromatograph (12 g Si cartridge) to afford the title compound (340 mg, 86%). LC-MS: m/z, 537 (M+H), rt 1.32 min.
Intermediate 101 1,1 -Dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5- dichlorophenyl)sulfonyl]amino}-1 -pyrrolidinecarboxylate
Figure imgf000074_0002
To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dichlorphenyl)sulfonyl]amino}-2-[(1 ,3-dioxo-1 ,3- dihydro-2H-isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate (0.8 g, 1.44 mmol) in EtOH (20 ml.) was added hydrazine hydrate (295 mg, 5.9 mmol). The reaction mixture was heated at reflux for 2 hours. The by-product was filtered off, and the filtrate was concentrated and purified by preparatory HPLC (without TFA) to afford the title compound as a white solid (390 mg, 64%). LC-MS: m/z, 426 (M+H), rt 1.58 min.
Intermediate 102 1,1 -Dimethylethyl (2/?,4/?)-2-(aminomethyl)-4-({[5-chloro-2-
(methyloxy)phenyl]sulfonyl}amino)-1 -pyrrolidinecarboxylate
Figure imgf000075_0001
To 1 ,1-dimethylethyl (2/?,4/?)-4-({[5-chloro-2-(methyloxy)phenyl]sulfonyl}amino)-2-[(1 ,3- dioxo-1 ,3-dihydro-2/-/-isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate (400 mg, 0.727 mmol) in EtOH (10 ml.) was added hydrazine hydrate (0.178 ml_, 3.64 mmol). The reaction mixture was heated at reflux for 1 hour. After cooling down, the mixture was filtered off, and the filtrate was concentrated to afford the title compound as a white solid (280 mg, 84%). LC-MS: m/z, 420 (M+H), rt 0.80 min.
Intermediate 103 1,1-Dimethylethyl (2/?,4/?)-2-(aminomethyl)-4-({[5-bromo-2- (methyloxy)phenyl]sulfonyl}amino)-1- pyrrolidinecarboxylate
Figure imgf000075_0002
To 1 ,1-dimethylethyl (2/?,4/?)-4-({[5-bromo-2-(methyloxy)phenyl]sulfonyl}amino)-2-[(1 ,3- dioxo-1 ,3-dihydro-2/-/-isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate (420 mg, 0.707 mmol) in EtOH (10 ml.) was added hydrazine hydrate (0.173 ml_, 3.53 mmol). The reaction mixture was refluxed for 1 hour. After cooling down, the mixture was filtered off, and the filtrate was concentrated to afford the title compound as a white solid (330 mg, 101%). LC-MS: m/z, 464 (M+H), rt 0.86 min.
Intermediate 104 1,1 -Dimethylethyl (2f?,4f?)-2-(aminomethyl)-4-({[2,5- bis(methyloxy)phenyl]sulfonyl}amino)-1 -pyrrolidinecarboxylate
Figure imgf000076_0001
To 1 ,1-dimethylethyl (2R,4R)-4-({[2,5-bis(methyloxy)phenyl]sulfonyl}amino)-2-[(1 ,3-dioxo- 1 ,3-dihydro-2/-/-isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate (380 mg, 0.696 mmol) in EtOH (10 ml.) was added hydrazine hydrate (0.171 ml_, 3.48 mmol). The reaction mixture was refluxed for 1 hour. After cooling down, the mixture was filtered off, and the filtrate was concentrated to afford the title compound as a white solid (280 mg, 97%). LC-MS: m/z, 416 (M+H), rt θ.74 min. Intermediate 105 1 ,1 -Dimethylethyl (2/?,4/?)-2-(aminomethyl)-4-[{[5-bromo-2-
(methyloxy)phenyl]sulfonyl}(phenylmethyl)amino]-1 - pyrrolidinecarboxylate
Figure imgf000076_0002
To 1 ,1-dimethylethyl (2R,4R)-4-[{[5-bromo-2-
(methyloxy)phenyl]sulfonyl}(phenylmethyl)amino]-2-[(1 ,3-dioxo-1 ,3-dihydro-2/-/-isoindol-2- yl)methyl]-1 -pyrrolidinecarboxylate (360 mg, 0.526 mmol) in EtOH (10 ml.) was added hydrazine hydrate (0.132 ml_, 2.63 mmol). The reaction mixture was refluxed for 1 hour. After cooling down, the mixture was filtered off, and the filtrate was concentrated to afford the title compound as a white solid (280 mg, 96%). LC-MS: m/z, 555 (M+H), rt 0.99 min.
Intermediate 106 1,1 -Dimethylethyl (2/?,4/?)-2-(aminomethyl)-4-[{[2,5- bis(methyloxy)phenyl]sulfonyl}(phenylmethyl)amino]-1 -pyrrolidinecarboxylate
Figure imgf000077_0001
To 1 ,1-dimethylethyl (2/?,4/?)-4-[{[2,5-bis(methyloxy)phenyl]sulfonyl}(phenylmethyl) amino]-2-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]-1 -pyrrolidinecarboxylate (340 mg, 0.535 mmol) in EtOH (10 mL) was added hydrazine hydrate (0.131 ml_, 2.67 mmol). The reaction mixture was refluxed for 1 hour. After cooling down, the mixture was filtered off, and the filtrate was concentrated to afford the title compound as a white solid (270 mg, 96%). LC-MS: m/z, 506 (M+H), rt 0.95 min. Intermediate 107 1,1-Dimethylethyl (2R,4S)-4-{[(1,1-dimethylethyl)
(dimethyl)silyl]oxy}-2-({[4-(methyloxy)phenyl]oxy} methyl)-1 -pyrrolidinecarboxylate
Figure imgf000077_0002
To a solution of 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2- (hydroxymethyl)-i-pyrrolidinecarboxylate (510 mg, 1.54 mmol), 4-(methyloxy)phenol (573 mg, 4.62 mmol) and PPh3 (524 mg, 2 mmol) in 6 ml dry THF, was added diethylazodicarboxylate (355 mg, 2.04 mmol) at room temperature. The resultant mixture was refluxed for 20 min., and then cooled to room temperature with stirring overnight. The reaction mixture was diluted with EA and washed with 1 N NaOH. The ethyl acetate layer was dried (MgSO4) and evaporated. The residue was purified by automated flash chromatography (40 g silica cartridge) to afford the title compound as a colorless oil. (480 mg, 71%). LC-MS: m/z, 438 (M+H), rt 3.14 min. Intermediate 108 1,1-Dimethylethyl (2R,4S)-4-{[(1,1- dimethylethyl)(dimethyl)silyl]oxy}-2-{[(4- fluorophenyl)oxy]methyl}-1-pyrrolidinecarboxylate
Figure imgf000078_0001
To a solution of 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2- (hydroxymethyl)-i-pyrrolidinecarboxylate (558 mg, 1.68 mmol), 4-fluorophenol (566 mg, 5.05 mmol) and PPh3 (572 mg, 2.18 mmol) in 6 ml dry THF, was added diethylazodicarboxylate (379 mg, 2.18 mmol) at room temperature. The resultant mixture was refluxed for 20 min., and then cooled to room temperature with stirring overnight. The reaction mixture was diluted with ethyl acetate and washed with 1 N NaOH. The ethyl acetate layer was dried (MgSO4) and evaporated. The residue was purified by automated flash chromatography (40 g silica cartridge) to afford the title compound as a colorless oil. (540 mg, 76%). LC-MS: m/z, 428 (M+H), rt 3.21 min. Intermediate 109 1,1-Dimethylethyl (2/?,4S)-4-{[(1,1-dimethylethyl) (dimethyl)silyl]oxy}-2-{[(phenylmethyl)oxy]methyl}-1 - pyrrolidinecarboxylate
Figure imgf000078_0002
In a 10 ml. round-bottomed flask was diluted 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1- dimethylethyl)(dimethyl)silyl]oxy}-2-(hydroxymethyl)-1 -pyrrolidinecarboxylate (0.5851 g, 1.765 mmol) in 1 ,2-dichloroethane (14 ml).Dudley reagent (0.9173 g, 2.63 mmol) and magnesium oxide (0.138 g, 3.42 mmol) were then added (suspension). The mixture was heated at reflux (83 0C) for 16 h, filtered through a pad of Celite, and the solvent was evaporated under vacuum to give a crude residue. The residue was loaded onto a 2 g silica SPE cartridge, and eluted sequentially with hexane, DCM and ethyl acetate. The DCM fractions were combined and condensed under vacuum to afford the title compound. (447 mg, 60%). LC-MS: m/z, 422 (M+H), rt 1.66 min. Intermediate 110 1,1-Dimethylethyl (2/?,4S)-4-{[(1,1-dimethylethyl)
(dimethyl)silyl]oxy}-2-({[3-(phenyloxy)propyl]oxy} methyl)- 1 -pyrrolidinecarboxylate
Figure imgf000079_0001
1 ,1-Dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2-(hydroxymethyl)-1- pyrrolidinecarboxylate (0.6 g, 1.810 mmol) was diluted in THF (1 ml) to give a colorless solution. The resulting mixture was cooled down to 0 0C under argon. Then sodium hydride (0.217 g, 9.05 mmol) in THF (2ml_) was added to give a white suspension followed by [(3-bromopropyl)oxy]benzene 3-bromopropyl phenyl ether (0.779 g, 3.62 mmol) in THF (1 ml). The resulting mixture was stirred at rt over the week end (96 h).The reaction was then quenched by addition of water at 0 0C. The THF was removed in vacuo and the resulting crude was diluted in DCM and washed with 0.1 M HCI, sat NaHCOs using a hydrophobic frit. The organic layer was then concentrated in vacuo to yield a colorless oil. This resulting oil was loaded onto a 5 g silica SPE cartridge, then eluted sequentially with hexane DCM and EA. The corresponding fractions were combined and evaporated to afford the title compound (0.45 g, 53%). LC-MS: m/z, 466 (M+H), rt 1.67 min.
Intermediate 111 1 ,1-Dimethylethyl (2/?,4S)-4-hydroxy-2-({[4-(methyloxy) phenyl] oxy}methyl)-1 -pyrrolidinecarboxylate
Figure imgf000079_0002
Under argon atmosphere in a solution of 1 ,1-dimethylethyl (2/?,4S)-4-{[(1 ,1- dimethylethyl)(dimethyl)silyl]oxy}-2-{[(4-fluorophenyl)oxy]methyl}-1 -pyrrolidinecarboxylate (480 mg, 1.1 mmol) in THF (~5 ml.) was added TBAF (1.6 ml_, 1.60 mmol) and stirred at room temperature for 3 hours. The crude was concentrated, diluted in ethyl acetate and the organic layer was washed with water. The aqueous layer was extracted with ethyl acetate (x 2); the organic layers were combined, dried over MgSO4 and concentrated to afford the title compound as a crude oil (470 mg). LC-MS: m/z, 324 (M+H), rt 1.76 min. Intermediate 112 1,1-Dimethylethyl (2R,4S)-2-{[(4-fluorophenyl)oxy] methyl} -4-hydroxy-i-pyrrolidinecarboxylate
Figure imgf000080_0001
Under argon atmosphere in a solution of 1 ,1-dimethylethyl (2/?,4S)-4-{[(1 ,1- dimethylethyl)(dimethyl)silyl]oxy}-2-{[(4-fluorophenyl)oxy]methyl}-1-pyrrolidinecarboxylate (280 mg, 0.66 mmol) in THF (~5 ml.) was added TBAF (1.0 ml_, 1.0 mmol) and stirred at room temperature for 3 hours. The crude was concentrated, diluted in ethyl acetate and the organic layer was washed with water. The aqueous layer was extracted with ethyl acetate (x 2); the organic layers were combined, dried over MgSO4 and concentrated to afford the title compound as a crude oil (240 mg). LC-MS: m/z, 312 (M+H), rt 1.89 min. Intermediate 113 1,1-Dimethylethyl (2/?,4S)-4-hydroxy-2-{[(phenylmethyl) oxy]methyl}-1-pyrrolidinecarboxylate
Figure imgf000080_0002
In a flask 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2- {[(phenylmethyl)oxy]methyl}-1-pyrrolidinecarboxylate (0.4474 g, 1.061 mmol) was diluted in THF. TBAF (2.122 ml, 2.122 mmol) was added and the resulting mixture was stirred for
1.5 hr at rt. The THF was then removed in vacuo. The reaction mixture was diluted with
DCM and washed with 0.1 M HCI, sat NaHCO3, and sat NaCI. The layers were separated using an hydrophobic frit and the organic layer was then concentrated in vacuo to yield the title compound as an oil. (0.293 g, 90%). LC-MS: m/z, 308 (M+H), rt 0.94 min.
Intermediate 114 1,1 -Dimethylethyl (2/?,4S)-4-hydroxy-2-({[3-(phenyloxy) propyl]oxy}methyl)-1-pyrrolidinecarboxylate
Figure imgf000080_0003
To a solution of 1 , 1 -dimethylethyl (2R,4S)-4-{[(1 , 1 -dimethylethyl)(dimethyl)silyl]oxy}-2-({[3- (phenyloxy)propyl]oxy}methyl)-1-pyrrolidinecarboxylate (0.45 g, 0.966 mmol) in THF was added TBAF (1.933 ml, 1.933 mmol, 1 M in THF). The resulting mixture was stirred for 2h at room temperature. THF was then removed in vacuo and the reaction mixture was diluted with ethyl acetate and washed with 0.1 M HCI, sat NaHCO3, and sat. NaCI using a hydrophobic frit. The resulting crude was then concentrated in vacuo to yield the title compound as an oil. (0.204 g, 48%). LC-MS: m/z, 352 (M+H), rt 1.02 min.
Intermediate 115 1,1-Dimethylethyl (2R,4R)-4-azido-2-({[4-
(methyloxy)phenyl]oxy}methyl)-1-pyrrolidinecarboxylate
Figure imgf000081_0001
To a solution of 1 ,1-dimethylethyl (2R,4S)-4-hydroxy-2-({[4-
(methyloxy)phenyl]oxy}methyl)-1-pyrrolidinecarboxylate (0.356 g, 1.1 mmol) in DCM (15 ml) was added TEA (0.460 ml, 3.30 mmol) and DMAP (0.202 g, 1.650 mmol) followed by dropwise adding mesyl chloride (0.129 ml, 1.650 mmol) at 0 0C with stirring. The reaction mixture was kept stirring under Argon for 2h at room temperature. It was then diluted with DCM and washed with 1 N HCI and saturated NaHCO3. The DCM layer was dried (Na2SO4) and evaporated to give the crude as a pale yellow oil, which was re-dissolved in acetonitrile (10 ml).followed by addition of tetrabutylammonium azide (469 mg, 1.650 mmol). The reaction mixture was refluxed under argon for 3h. The solvent was removed under vacuum and the residue was purified by automated flash chromatography (12 g of silica) to afford the title compound as a pale yellow oil (340 mg, 68%). LC-MS: m/z, 349 (M+H), rt 2.31 min. Intermediate 116 1,1-Dimethylethyl (2R,4R)-4-azido-2-{[(4- fluorophenyl)oxy]methyl}-1-pyrrolidinecarboxylate
Figure imgf000081_0002
To a solution of 1 ,1-dimethylethyl (2R,4S)-2-{[(4-fluorophenyl)oxy]methyl}-4-hydroxy-1- pyrrolidinecarboxylate (0.205 g, 0.66 mmol) in DCM (10 ml) was added TEA (0.276 ml, 1.980 mmol) and DMAP (0.121 g, 0.990 mmol) followed by dropwise adding mesyl chloride (0.077 ml, 0.990 mmol) at 0 0C with stirring. The reaction mixture was kept stirring under argon for 2h at room temperature. Dilute with DCM and washed with 1 N HCI and saturated NaHCO3. The DCM layer was dried (Na2SO4) and evaporated to give the crude product as a pale yellow oil, which was re-dissolved in acetonitrile (10 ml).followed by addition of tetrabutylammonium azide (282 mg, 0.99 mmol). The reaction mixture was refluxed under argon for 1 h. The solvent was removed via vacuum and the residue was purified by automated flash chromatography (12 g of silica) to afford the title compound as a pale yellow oil (176 mg, 79%). LC-MS: m/z, 337 (M+H), rt 2.40 min. Intermediate 117 1,1-Dimethylethyl (2/?,4/?)-4-azido-2-
{[(phenylmethyl)oxy]methyl}-1-pyrrolidinecarboxylate
Figure imgf000082_0001
1 ,1 -Dimethylethyl (2R,4S)-4-hydroxy-2-{[(phenylmethyl)oxy]methyl}-1 - pyrrolidinecarboxylate (0.293 g, 0.952 mmol) was diluted in dichloromethane (DCM) (2 ml) to give a colorless solution at 0 0C. Then triethylamine (0.332 ml, 2.381 mmol) and mesyl chloride (0.148 ml, 1.904 mmol) were added and the resulting mixture was stirred at room temperature for 48 hours. The crude was then washed with 0.1 M HCI, sat NaHCO3. The organic layer was separated and dried over MgSO4, filtered and concentrated to yield a white solid (0.3112 g, 0.807 mmol). The solid was dissolved in acetonitrile (4 ml) under argon and was added tertabutylammonium azide (0.276 g, 0.969 mmol). The resulting mixture was then heated at reflux for 16h. After cooling down, it was diluted with DCM and washed with H2O, 0.1 M HCI, and sat NaHCO3. The organic layer was dried over MgSO4, filtered and concentrated. The crude product was purified by automated flash chromatography (4 g of silica) to afford the title compound (0.22 g, 82%). LC-MS: m/z, 333 (M+H), rt 1.25 min.
Intermediate 118 1 ,1 -Dimethylethyl (2R,4R)-4-azido-2-({[3-(phenyloxy) propyl]oxy}methyl)-1 -pyrrolidinecarboxylate
Figure imgf000082_0002
1 , 1 -Dimethylethyl (2R,4S)-4-hydroxy-2-({[3-(phenyloxy)propyl]oxy}methyl)-1 - pyrrolidinecarboxylate (0.2047 g, 0.582 mmol) was diluted in dichloromethane (DCM) (2 ml) to give a colorless solution at 0 0C. Then triethylamine (0.203 ml, 1.456 mmol) and mesyl chloride (0.091 ml, 1.165 mmol) were added and the resulting mixture was stirred at room temperature for 16 h. The mixture was then washed with 0.1 M HCI, sat NaHCO3 and NaCI solution using an hydrophobic frit. The organic layer was then concentrated under vacuum. The residue was dissolved in acetonitrile (3 ml) under argon and to it was added tertabutylammonium azide (0.108 g, 0.381 mmol). The resulting mixture was then heated at reflux for 7h. After cooling down, it was diluted in DCM and washed with H2O, 0.1 M HCI, saturated NaHCO3 and brine using a hydrophobic frit. The organic layer was then concentrated in vacuo to afford the title compound (101 mg, 85%). LC-MS: m/z, 377 (M+H), rt 1.32 min. Intermediate 119 1 ,1 -Dimethylethyl-(2/?,4/?)-4-amino-2-({[4-(methyloxy) phenyl]oxy}methyl)-1-pyrrolidinecarboxylate
Figure imgf000083_0001
1 ,1-Dimethylethyl (2R,4R)-4-azido-2-({[4-(methyloxy)phenyl]oxy}methyl)-1- pyrrolidinecarboxylate (340 mg, 0.976 mmol) in methanol (20 ml) was hydrogenated over 10% Pd/C in a H-Cube™ reactor. The product was concentrated to afford the title compound as colorless oil (280 mg, 89%). LC-MS: m/z, 323 (M+H), rt 1.45 min.
Intermediate 120 1 ,1 -Dimethylethyl-(2/?,4/?)-4-amino-2-{[(4- fluorophenyl)oxy]methyl}-1 -pyrrolidinecarboxylate
Figure imgf000083_0002
NH;
1 , 1 -Dimethylethyl-(2R,4R)-4-azido-2-{[(4-fluorophenyl)oxy]methyl}-1 - pyrrolidinecarboxylate (176 mg, 0.523 mmol) in Methanol (15 ml)was hydrogenated over 10% Pd/C in a H-Cube™ reactor. The product was concentrated to afford the title compound as colorless oil (140 mg, 86%). LC-MS: m/z, 323 (M+H), rt 0.94 min. Intermediate 121 1 ,1 -Dimethylethyl (2/?,4/?)-4-amino-2- {[(phenylmethyl)oxy]methyl}-1-pyrrolidinecarboxylate
Figure imgf000084_0001
1 ,1 -Dimethylethyl (2R,4R)-2-{[(phenylmethyl)oxy]methyl}-4-(2l5-1-triazen-2-yn-1-yl)-1- pyrrolidinecarboxylate (0.22 g, 0.662 mmol) in methanol (40 ml) was hydrogenated over 10% Pd/C in a H-Cube™ reactor. The product was concentrated to afford the title compound as colorless oil (0.192 g, 94%). LC-MS: m/z, 307 (M+H), rt 0.76 min. Intermediate 122 1,1 -Dimethylethyl (2/?,4/?)-4-amino-2-({[3-
(phenyloxy)propyl]oxy}methyl)-1-pyrrolidinecarboxylate
Figure imgf000084_0002
1 ,1 -Dimethylethyl (2R,4R)-2-({[3-(phenyloxy)propyl]oxy}methyl)-4-(2l5-1-triazen-2-yn-1-yl)- 1-pyrrolidinecarboxylate (0.1014 g, 0.269 mmol) in methanol (10 ml) was hydrogenated over 10% Pd/C in a H-Cube™ reactor. The product was concentrated to afford the title compound as colorless oil (0.192 g, 94%). LC-MS: m/z, 351 (M+H), rt 0.82 min.
Intermediate 123 5-Bromo-2-chloro-4-fluorobenzenesulfonyl chloride
Figure imgf000084_0003
A mixture of 1-bromo-4-chloro-2-fluorobenzene (10 g, 47.7 mmol) and fuming sulfuric acid (18-24% SO3, 40 ml) was heated at 1 10 0C over night. After cooling down to room temperature, the reaction mixture was carefully poured into ice (700 g). The resulting mixture was stirred at room temperature for 30 min followed by addition of ethyl acetate. The aqueous layer was isolated and concentrated under vacuum. The precipitate was filtered off to give 5-bromo-2-chloro-4-fluorobenzenesulfonic acid as white crystals (4.9 g, 35.4%).
The acid previously prepared (4.8 g, 16.58 mmol) and phosphorus pentachloride (10.36 g, 49.7 mmol) were heated at 1 10 0C over night. After cooling down to room temperature, the reaction mixture was carefully poured into ice (50 g). The resulting mixture was stirred at room temperature for 30 min followed by addition of ethyl acetate. The ethyl acetate layer was isolated and concentrated under vacuum to give the title compound as a yellow oil (5.1 g, 100%).1H NMR(CDCI3) δ 8.40 (d, 1 H), 7.46 (d, 1 H).
Intermediate 124 2,5-Dichloro-4-fluorobenzenesulfonyl chloride
Figure imgf000085_0001
A mixture of 1 ,4-dichloro-2-fluorobenzene (5 g, 30.3 mmol) and fuming sulfuric acid (18- 24% SO3, 20 ml) was heated at 1 10 0C overnight. After cooling down to room temperature, the reaction mixture was carefully poured into ice (700 g). The resulting mixture was stirred at room temperature for 30 min followed by addition of ethyl acetate. The aqueous layer was isolated and concentrated under vacuum. The precipitate was filtered off to give 2,5-dichloro-4-fluorobenzenesulfonic acid as white crystals (3.33 g, 45%).
The acid previously prepared (2.0 g, 8.2 mmol) and phosphorus pentachloride (5 g, 24 mmol) were heated at 110 0C overnight. After cooling down to room temperature, the reaction mixture was carefully poured into ice (50 g) The resulting mixture was stirred at room temperature for 30 min followed by addition of ethyl acetate (100 ml_). The ethyl acetate layer was isolated and concentrated under vacuum to give the title compound as yellow oil (1.29 g, 60%). 1H NMR(d6-DMSO) δ 7.62 (d, 1 H), 7.95 (d, 1 H). Intermediate 125 2-Bromo-5-chloro-4-fluorobenzenesulfonyl chloride
Figure imgf000086_0001
A mixture of 4-bromo-1-chloro-2-fluorobenzene (10 g, 47.7 mmol) and fuming sulfuric acid (18-24% SO3, 40 ml) was heated at 1 10 0C over night. After cooling down to room temperature, the reaction mixture was carefully poured into ice (700 g). The resulting mixture was stirred at room temperature for 30 min followed by addition of EA. The aqueous layer was isolated and concentrated under vacuum. The precipitate was filtered off to give 2,5-dichloro-4-fluorobenzenesulfonic acid as white crystals (3.6 g, 26%).
The acid previously prepared (3.51 g, 1 1.4 mmol) and phosphorus pentachloride (7.77 g, 37.3 mmol) were heated at 110 0C overnnight. After cooling down to room temperature, the reaction mixture was carefully poured into ice (50 g) The resulting mixture was stirred at room temperature for 30 min followed by addition of EA (100 ml_). The ethyl acetate layer was isolated and concentrated under vacuum to give the title compound as a yellow oil (3.51 g, 92%). 1H NMR(CDCI3) 5 8.30 (d, 1 H), 7.69 (d, 1 H).
Intermediate 126 ((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-1 -{[(1,1- dimethylethyl)oxy]carbonyl}-2-pyrrolidinyl)methyl 1H- imidazole-1 -carboxylate
Figure imgf000086_0002
1 , 1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-(hydroxymethyl)-1 - pyrrolidinecarboxylate (50 mg, 0.097 mmol) was diluted in DCM (1 ml.) and mixed with carbodiimidazole at room temperature for 2.5 days. The reaction was then diluted with DCM and washed with brine. The organic layer was separated via a hydrophobic frit and concentrated under vacuum to give ((2/?,4/?)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-1- {[(1 ,1-dimethylethyl)oxy]carbonyl}-2-pyrrolidinyl)methyl 1 /-/-imidazole- 1 -carboxylate (59 mg, 100%). LC-MS: m/z, 440.8 (M+H), r. 2.04 min.
Intermediate 127 1 ,1 -dimethylethyl (2R,4/?)-4-{[(2,5- dibromophenyl)sulfonyl]amino}-2-formyl-1 - pyrrolidinecarboxylate
Figure imgf000087_0001
To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-(hydroxymethyl)-1- pyrrolidinecarboxylate (0.205 g, 0.399 mmol) in DCM (50 ml.) was added NaBr (0.082 g, 0.797 mmol) and TEMPO (6.23 mg, 0.040 mmol) at 0 0C. The solution became pale yellow, then 2 ml. of a solution of NaHCO3 (220 mg) and 10-13% aq NaCIO (2.0 ml.) in water (5.0 ml.) was added. The solution turned brown very quickly and was immediately extracted with ether (10.0 ml.) then washed with a aq. Na2S2θ3 solution (10.0 ml) then brine( 10.0 ml_). The organic layer was then dried over Mg2SO4 and concentrated to give a crude mixture containing 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5- dibromophenyl)sulfonyl]amino}-2-formyl-1 -pyrrolidinecarboxylate which was used as such for subsequent reactions.
Intermediate 128 1 ,1 -dimethylethyl (2R,4S)-4-{[(1 ,1 - dimethylethyl)(dimethyl)silyl]oxy}-2-[(ethyloxy)methyl]-1 - pyrrolidinecarboxylate
Figure imgf000087_0002
To 1 , 1 -dimethylethyl (2R,4S)-4-{[(1 , 1 -dimethylethyl)(dimethyl)silyl]oxy}-2-(hydroxymethyl)-
1 -pyrrolidinecarboxylate (1.0 g, 3.03 mmol) in THF (1O mL) were added ethyl bromide (3.29 g, 30.2 mmol) and Kl (50 mg) at 0 0C under an argon atmosphere. NaH (0.725 g,
30.2 mmol) was added portionwise to the mixture, which was then allowed to stir from 0 0C to room temperature over 2.5 days. The reaction mixture was quenched with water then DCM was added. The organic layer was separated and washed with a 0.1 N HCI solution then a sat. aq NaHCOs solution, dried over MgSO4 and concentrated to afford a crude material, which was shown to contain some unreacted 1 ,1-dimethylethyl (2R,4S)-4- {[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2-(hydroxymethyl)-1-pyrrolidinecarboxylate. . The procedure (same amount of reagents, but a reaction time of 16 hours instead of 2.5 days) described above was repeated using the crude material instead of the pure alcohol starting material. The second crude material thus obtained was shown to still contain some alcohol starting material and was purified by automated flash chromatography (using a gradient of ethyl acetate in hexane) to give the title compound (0.4207 g). LC/MS: m/z, 259 (M-IOO(BOC)), rt 2.98 min.
Intermediate 129 1 ,1-dimethylethyl (2R,4S)-2-[(ethyloxy)methyl]-4-hydroxy-1- py rrol i d i n eca rboxyl ate
Figure imgf000088_0001
To 1 ,1 -dimethylethyl (2R,4S)-4-{[(1 , 1 -dimethylethyl)(dimethyl)silyl]oxy}-2-
[(ethyloxy)methyl]-1-pyrrolidinecarboxylate (420.7 mg) in THF (1 1.7 ml.) was added TBAF (2.34 ml_, 2.34 mmol) and the resulting mixture was stirred at room temperature for 3 hours. THF was removed under vacuum then the residue was diluted with ethyl acetate. The mixture was washed with a 0.1 N HCI solution, a sat. aq NaHCO3 solution, then a sat. aq. sodium chloride solution. The organic layer was dried over MgSO4, filtered and concentrated to afford the title compound (0.257 g, trace of TBS-containing products still present). LC-MS: m/z, 245 (M+), rt 1.39 min.
Intermediate 130 1,1-dimethylethyl (2R,4S)-2-[(ethyloxy)methyl]-4- [(methylsulfonyl)oxy]-1-pyrrolidinecarboxylate
Figure imgf000089_0001
Under an argon atmosphere at 0 0C, 1 ,1-dimethylethyl (2/?,4S)-2-[(ethyloxy)methyl]-4- hydroxy-1-pyrrolidinecarboxylate (0.257 g, 1.048 mmol) was diluted in DCM (3 ml_). To the resultant mixture, triethylamine (0.438 ml_, 3.14 mmol), DMAP (0.192 g, 1.571 mmol) were added followed by methanesulfonyl chloride (0.122 ml, 1.571 mmol). The resulting mixture was stirred at room temperature for 2 hours. The reaction mixture was diluted with DCM (3 ml_). The organic layer was washed with a 0.1 N HCI solution, a sat. aq. NaHCOs solution, then an aq. sat. NaCI solution. The organic layer was separated through a hydrophobic frit and concentrated to afford the title compound as an orange oil
(0.315 g). LC-MS: m/z, 323.9 (M+H), rt 1.68 min.
Intermediate 131 1,1-dimethylethyl (2R,4R)-4-azido-2-[(ethyloxy)methyl]-1- pyrrolidinecarboxylate
Figure imgf000089_0002
To an orange solution of 1 ,1-dimethylethyl (2R,4S)-2-[(ethyloxy)methyl]-4- [(methylsulfonyl)oxy]-1-pyrrolidinecarboxylate (0.3154 g, 0.975 mmol) in AcCN (4 ml.) was added NaN3 (0.333 g, 1.170 mmol) under an argon atmosphere. The reaction mixture was then heated at reflux for 5 hr then stirred at room temperature overnight. The reaction mixture was diluted with DCM and washed with water, a 0.1 N HCI solution and a sat. aq. NaHCO3 solution then dried over MgSO4. After concentration, a crude material containing the title compound and 15% of starting material was obtained. To this material in AcCN (2.0 ml.) was added NaN3 (0.166 g, 0.585 mmol). The resulting mixture was stirred at reflux for 3 hr, then diluted with DCM and washed with water, a 0.1 N HCI solution and a sat. aq. NaHCO3 solution. It was then dried over MgSO4 and concentrated to give a crude residue which was purified by automated flash chromatography (4 g Si cartridge, elution with a 0 to 50% gradient of ethyl acetate in hexane). The relevant fractions were collected, combined and concentrated to yield the title compound (0.1534 g,). LC-MS: m/z, 271 (M+H), rt 1.96 min.
Intermediate 132 1,1-dimethylethyl (2/?,4/?)-4-amino-2-[(ethyloxy)methyl]-1- pyrrolidinecarboxylate
Figure imgf000090_0001
1 ,1-dimethylethyl (2/?,4/?)-4-azido-2-[(ethyloxy)methyl]-1 -pyrrolidinecarboxylate (0.1534 g, 0.567 mmol) in MeOH (10 ml.) was hydrogenated over 10% Pd/C in a H-Cube™ reactor. The reaction mixture was concentrated to afford the title compound (0.20 g, material purity is about 50% by LC/MS with an known impurity present). LC-MS: m/z, 245 (M+H), rt 1.31 min.
Intermediate 133 1,1-dimethylethyl (2R,4/?)-4-{[(2,5- dibromophenyl)sulfonyl]amino}-2-[(ethyloxy)methyl]-1- pyrrolidinecarboxylate
Figure imgf000090_0002
To 1 ,1 -dimethylethyl (2/?,4/?)-4-amino-2-[(ethyloxy)methyl]-1 -pyrrolidinecarboxylate (0.0834 g, 0.341 mmol) in DCM (1.5 mL) were added DIPEA (0.1 19 mL, 0.683 mmol) and 2,5-dibromobenzenesulfonyl chloride (0.114 g, 0.341 mmol). The resultant mixture was stirred at room temperature for 3h. The reaction mixture was concentrated under vacuum and the residue was loaded onto a 1 g silica SPE cartridge, eluting sequentially with DCM and ethyl acetate. The ethyl acetate fractions were combined and concentrated to afford a residue containing the title compounds with some traces of DIPEA and an unknown product. This material was washed with water, a 0.1 N HCI solution then a sat. aq. NaHCO3 solution. The organic layer was separated by passing the mixture through a hydrophobic frit. After concentration, the title compound was obtained (0.144 g, 0.266 mmol). LC-MS: m/z, 543 (M+H), rt 2.59 min.
Intermediate 134 1,1-dimethylethyl (2S,4S)-2-(cyanomethyl)-4-{[(1,1- dimethylethyl)(dimethyl)silyl]oxy}-1- pyrrolidinecarboxylate
Figure imgf000091_0001
To a solution of 1 ,1-dimethylethyl (2R,4S)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-2- {[(methylsulfonyl)oxy]methyl}-1-pyrrolidinecarboxylate (3.66 g, 8.94 mmol) in acetonitrile (30 ml), tetrabutylammonium cyanide (3.60 g, 13.40 mmol) was added, then the mixture was heated to reflux for 4 h. After LC/MS showed the reaction was completed, it was cooled to room temperature. The solvent was removed and the residue was purified by flash automated chromatography (0-30% ethyl acetate gradient in hexane) to give the title compound as a colorless oil (2.31 g). LC/MS: m/z, 341 (M+H), rt 1.40 min
Intermediate 135 1,1-dimethylethyl (2S,4S)-2-(cyanomethyl)-4-hydroxy-1- pyrrolidinecarboxylate
Figure imgf000091_0002
To 1 ,1-dimethylethyl (2S,4S)-2-(cyanomethyl)-4-{[(1 ,1-dimethylethyl)(dimethyl)silyl]oxy}-1- pyrrolidinecarboxylate (1.14 g, 3.35 mmol) in THF (10 mL), a TBAF (0.982 g, 3.68 mmol) solution in THF (15 ml) was added at room temperature and the resulting mixture was stirred for 2 h. LC/MS showed the reaction was completed. The solvent was removed under vacuum to give a residue, which was dissolved in EtOAc (20 ml), washed with water
(10 ml) and brine (10 ml), and then dried over MgSO4. The solvent was removed under vacuum, to give the title product as a colorless oil (1.02 g) which was used in the next step without purification. LC/MS: m/z, 227 (M+H), rt 1.31 min.
Intermediate 136 1,1-dimethylethyl (2S,4S)-2-(cyanomethyl)-4- [(methylsulfonyl)oxy]-1-pyrrolidinecarboxylate
Figure imgf000092_0001
To a mixture of 1 ,1-dimethylethyl (2S,4S)-2-(cyanomethyl)-4-hydroxy-1- pyrrolidinecarboxylate (1.0 g, 3.35 mmol) and TEA (0.699 ml, 5.02 mmol) in DCM (15 ml), Ms-Cl (0.287 ml, 3.68 mmol) was added dropwise and the resulting reaction mixture was stirred at room temperature for 16 hours. LC/MS showed reaction was completed. The mixture was diluted with DCM (10 ml), washed with water (2 x 50 ml) and brine (5 ml), and then dried over MgSO4. After filtration and concentration under vacuum, the crude product was purified by automated flash chromatography to give the title compound (0.848 g). LC/MS: m/z, 204.9 (M-100 (BOC)), rt 0.79 min.
Intermediate 137 1,1-dimethylethyl (2/?,4/?)-4-azido-2-(cyanomethyl)-1- pyrrolidinecarboxylate
Figure imgf000092_0002
To a solution of 1 ,1-dimethylethyl (2S,4S)-2-(cyanomethyl)-4-[(methylsulfonyl)oxy]-1- pyrrolidinecarboxylate (0.848 g, 2.79 mmol) in acetonitrile (15 ml), tetrabutyl ammonium azide (1.189 g, 4.18 mmol) was added in several portions, then the mixture was heated at reflux for 4 hours. LC/MS showed that the reaction was completed. The mixture was cooled down to room temperature and the solvent was removed under reduced pressure. The resulting crude product was purified by automated flash chromatography to give the title compound (0.605 g). LC/MS: m/z, 241.9; rt 0.86 min. Intermediate 138 1 ,1 -dimethylethyl (2/?,4/?)-4-amino-2-(cyanomethyl)-1 - pyrrolidinecarboxylate
Figure imgf000093_0001
1 , 1 -Dimethylethyl (2/?,4/?)-4-azido-2-(cyanomethyl)-1 -pyrrolidinecarboxylate (51 Omg, 2.030 mmol) in MeOH (50 ml.) was hydrogenated over 10% Pd/C in a H-Cube™ reactor for 3 hr. The reaction mixture was concentrated to afford the title compound (449 mg). LC-MS: m/z, 225.9 (M), rt 0.78 min.
Intermediate 139 ^-{[(1 ,1 -dimethylethyOoxylcarbony^-ΛT-methyl-Λ/1- (methyloxy)-L-valinamide
Figure imgf000093_0002
To a mixture of N-methoxymethanamine hydrochloride (49.4 g, 0.507 mol) in DCM (1.5 L) at 0 0C are added TEA (146 ml, 1.106 mol), Λ/-{[(1 ,1-dimethylethyl)oxy]carbonyl}-L-valine (100 g, 0.461 mol) and TBTU (163 g, 0.507 mol). The reaction mixture is stirred for about 18 hr. Then water (500 ml) and DCM (500 ml) are added. The solid formed is removed by filtration, and the filtrate is placed for ten minutes. Then the organic phase is separated, washed with water (500 ml x 3), dried over Na2SO4 and concentrated. The residue is purified by column chromatography on silica gel (PE:EA = 4:1 ) to afford N2- {[(1 ,1-dimethylethyl)oxy]carbonyl}-Λ/1-methyl-Λ/1-(methyloxy)-L-valinamide (90 g, 75.0 %). 1H NMR(CDCI3) δ 0.90 (q, 6H), 1.41 (s, 9H), 1.95 (m, 1 H), 3.20 (s, 3H), 3.75 (s, 3H), 4.55 (s, 1 H), 5.1 1 (d, 1 H). Intermediate 140 1,1-dimethylethyl [(1S)-1-formyl-2- methylpropyl]carbamate
Figure imgf000094_0001
To a solution of Λ/2-{[(1 ,1-dimethylethyl)oxy]carbonyl}-Λ/1-methyl-Λ/1-(methyloxy)-L- valinamide (90 g, 0.346 mol) in THF (1.5 L) at 0 0C is added LiAIH4 (14.46 g, 0.381 mol) slowly. The reaction mixture is stirred for about 1 h. Then water (30 ml) is added dropwise, the solid formed is removed by filtration, and the filtrate is dried over Na2SO4 and concentrated to afford 1 ,1-dimethylethyl [(1 S)-1-formyl-2-methylpropyl]carbamate (71 g) as a crude material. 1H NMR(CDCI3) δ 0.95 (q, 6H), 1.41 (s, 9H), 2.25 (s, 1 H), 4.20 (s, 1 H), 5.09 (s, 1 H), 9.60 (s, 1 H).
Intermediate 141 1,1-dimethylethyl [(1S)-1-(1-methylethyl)-2-propen-1- yl]carbamate
Figure imgf000094_0002
To a mixture of CH3Ph3PBr (28.4 g, 79.6 mmol) in THF (150 ml) at -78 0C is added n-BuLi (29.8 ml, 74.6 mmol) dropwise, the reaction mixture is allowed to warm to 0 0C and stirred for 0.5 h. Then a solution of 1 ,1-dimethylethyl [(1 S)-1-formyl-2-methylpropyl]carbamate (10 g, 49.75 mmol) in THF (50 ml) is added dropwise at -78 0C. The reaction is then allowed to warm to room temperature (28 0C) and stirred for 3hr. Then water (100 ml) is added dropwise, the organic phase is separated, dried over Na2SO4 and concentrated. The residue is purified by column chromatography on silica gel to afford 1 ,1-dimethylethyl [(1 S)-1-(1-methylethyl)-2-propen-1-yl]carbamate (3 g, 30.3 %). 1H NMR(CDCI3) δ 0.85 (q, 6H), 1.40 (s, 9H), 1.70 (m, 1 H), 3.91 (s, 1 H), 4.45 (s, 1 H), 5.05 (q, 2H), 5.69 (m, 1 H). Intermediate 142 1,1-dimethylethyl [(1S)-1-(1-methylethyl)-2-propen-1-yl]2- propen-1 -ylcarbamate
Figure imgf000095_0001
To a solution of 1 ,1-dimethylethyl [(1 S)-1-(1-methylethyl)-2-propen-1-yl]carbamate (2 g, 10.035 mmol) in DMF (20 ml) at 0 0C is added NaH (1.6 g, 40.14 mmol) slowly. After being stirred for about half an hour, 3-bromoprop-1-ene (4.3 ml, 50.176 mmol) is added, the reaction is allowed to warm to room temperature (28 0C) and stirred for 18 hr. Then water (50 ml.) is added slowly together with DCM (100 ml), the organic phase is separated and the water phase is extracted with DCM (30 ml x 3). The combined organic layers were washed with aq. NH4CI solution three times, dried over Na2SO4 and concentrated. The residue is purified by column chromatography on silica gel (pet etheπethyl acetate = 140:1 ) to afford 1 ,1-dimethylethyl [(1 S)-1-(1-methylethyl)-2-propen-1-yl]2-propen-1- ylcarbamate (1.2 g, 50.0 %). 1H NMR(CDCI3) δ 0.80 (q, 6H), 1.39 (s, 9H), 1.88 (m, 1 H), 3.30-4.00 (m, 3H), 5.05 (q, 4H), 5.78 (m, 2H).
Intermediate 143 [(1 S)-1 -(1 -methylethyl)-2-propen-1 -yl]2-propen-1 -ylamine hydrochloride
CIHHN^^
A solution of tert-butyl allyl(S)-4-methylpent-1-en-3-ylcarbamate (21 g, 87.866 mmol) in dioxane/HCI (100 ml) solution is stirred for about 2 hr. The resulting mixture is concentrated to afford [(1 S)-1-(1-methylethyl)-2-propen-1-yl]2-propen-1 -ylamine hydrochloride (15.37 g, 100 %). 1H NMR(CDCI3) δ 1.05 (q, 6H), 2.38 (m, 1 H), 3.31 (m, 1 H), 3.41 (m, 1 H), 3.85 (m, 1 H), 5.40 (m, 4H), 5.85 (m, 1 H), 6.11 (m, 1 H), 9.40 (s, 1 H), 9.75 (s, 1 H). Intermediate 144 phenylmethyl [(1S)-1 -(1 -methylethyl)-2-propen-1 -yl]2- propen-1 -ylcarbamate
Cbz-N^^
To a mixture of [(1 S)-1-(1-methylethyl)-2-propen-1-yl]2-propen-1-ylamine hydrochloride (15.37 g, 87.83 mmol) in ethyl acetate (100 ml) and water (100 ml) is added K2CO3 (36.4 g, 263.48 mmol) and then carbobenzyloxyCI (22.5 ml, 131.74 mmol). The reaction mixture is stirred for 16 hr. Then the organic phase is separated and the water phase is extracted with ethyl acetate (50 ml x 3). The combined organic layers were dried over
Na2SO4 and concentrated. The residue is purified by column chromatography on silica gel (PE:EA = 50:1 ) to afford phenylmethyl [(1 S)-1-(1-methylethyl)-2-propen-1-yl]2-propen-1- ylcarbamate (23.7 g, 89.3 %) as a yellow oil. 1H NMR(CDCI3) δ 0.85 (q, 6H), 1.95 (s, 1 H),
3.19-4.00 (m, 3H), 5.11 (m, 6H), 5.83 (m, 2H), 7.32 (m, 5H).
Intermediate 145 phenylmethyl (2S)-2-(1 -methylethyl)-2,5-dihydro-1H- pyrrole-1 -carboxylate
Figure imgf000096_0001
To a solution of phenylmethyl [(1 S)-1-(1-methylethyl)-2-propen-1-yl]2-propen-1- ylcarbamate (10 g, 36.68 mmol) in DCM (100 ml) is added Grubbs Catalyst (1 g). The reaction mixture is stirred for 16 hr. The resulting mixture is concentrated and the residue is purified by column chromatography on silica gel (pet etheπethyl acetate = 50:1 ) to afford phenylmethyl (2S)-2-(1-methylethyl)-2,5-dihydro-1 /-/-pyrrole-1 -carboxylate (95.0 % yield). 1H NMR(CDCI3) δ 0.70 (q, 3H), 0.91 (q, 3H), 2.20-2.50 (m, 1 H), 4.05 (m, 1 H), 4.26 (m, 1 H), 4.55 (m, 1 H), 5.12 (m, 2H), 5.11-5.88 (m, 2H), 7.35 (m, 5H). Intermediate 146 phenylmethyl (2/?,4S)-4-hydroxy-2-(1 -methylethyl)-1 - pyrrolidinecarboxylate
Figure imgf000097_0001
A solution of phenylmethyl (2S)-2-(1-methylethyl)-2,5-dihydro-1 /-/-pyrrole-1-carboxylate (9 g, 36.690 mmol) in BH3/THF (110 ml, 110.07 mmol) under N2 atmosphere is heated to reflux for 16 hs. After cooling, NaOH (8.8 g, 220.14 mmol) solid is added. The reaction solution is then cooled to 0 0C. And H2O2 (33 ml, 293.52 mmol) is added dropwise, the resulting mixture is heated to reflux for 2 hr. Then aq. Na2SO3 solution is added in portions. The organic phase is separated and the water phase is extracted with ethyl acetate (50 ml x 3). The combined organic layers were dried over Na2SO4 and concentrated under reduced pressure. The residue is purified by column chromatography on silica gel (D CM: MeO H = 100:1 ) to afford phenylmethyl (2R,4S)-4-hydroxy-2-(1- methylethyl)-1 -pyrrolidinecarboxylate (5.3 g, 54.92 %) of the pure compound . 1H NMR(CDCI3) δ 0.65-0.95 (m, 6H), 1.81 (m, 2H), 1.90-2.45 (m, 1 H), 3.35 (m, 1 H), 3.50- 4.00 (m, 2H), 4.15-4.35 (m, 1 H), 5.10 (s, 2H), 7.28 (m, 5H).
Intermediate 147 1,1-dimethylethyl (2R,4S)-4-hydroxy-2-(1-methylethyl)-1- pyrrolidinecarboxylate
Figure imgf000097_0002
To a solution of (2R,4S)-benzyl 4-hydroxy-2-isopropylpyrrolidine-1-carboxylate (5.3 g, 20.152 mmol) and (Boc)2O (4.8 ml, 22.167 mmol) in EtOH (100 ml) at H2 (40 psi) atmosphere is added Pd/C (1 g) as a catalyst. The reaction is stirred for 16hr. Then the mixture is filtered and the filtrate is condensed to afford 1 ,1-dimethylethyl (2/?,4S)-4- hydroxy-2-(1-methylethyl)-1 -pyrrolidinecarboxylate (4.8 g, 100 %) as a yellow oil. 1H NMR(CDCI3) δ 0.85 (m, 6H), 1.45 (s, 9H), 1.83 (m, 2H), 1.92-2.40 (m, 1 H), 3.30 (m, 1 H), 3.50-4.00 (m, 2H), 4.19-4.40 (m, 1 H). Intermediate 148 1,1-dimethylethyl (2R,4S)-2-(1-methylethyl)-4- [(methylsulfonyl)oxy]-1-pyrrolidinecarboxylate
Figure imgf000098_0001
To a solution of 1 ,1-dimethylethyl (2R,4S)-4-hydroxy-2-(1-methylethyl)-1- pyrrolidinecarboxylate (5.0 g, 21.834 mmol) in DCM (10OmL) is added triethylamine (8.6 ml, 65.502 mmol). Then hypochlorous methanesulfonic anhydride (3.4 ml, 43.668 mmol) is added dropwise at 0 0C. The mixture is stirred for 30min at 25 0C. The reaction is monitored via TLC. Then the mixture is washed with water and extracted with ethyl acetate. The organic phase is dried over Na2SO4 and evaporated under reduced pressure to afford crude 1 ,1-dimethylethyl (2R,4S)-2-(1-methylethyl)-4-[(methylsulfonyl)oxy]-1- pyrrolidinecarboxylate (7.5 g ) as a yellow oil. 1H NMR(CDCI3) δ 0.70-1.00 (m, 6H), 1.45 (s, 9H), 1.70-2.40 (m, 3H), 3.01 (s, 3H), 3.30-4.10 (m, 3H), 5.02-5.19 (m, 1 H).
Intermediate 149 1,1-dimethylethyl (2R,4/?)-4-azido-2-(1-methylethyl)-1- pyrrolidinecarboxylate
Figure imgf000098_0002
To a solution of 1 ,1-dimethylethyl (2R,4S)-2-(1-methylethyl)-4-[(methylsulfonyl)oxy]-1- pyrrolidinecarboxylate (7.5 g, 24.43 mmol) in N,N-dimethylformamide (70 mL) is added
NaN3 (6.4 g, 97.72 mmol). The mixture is stirred for 18hr at 600C. The mixture is washed with water and saturated NH4CI aqueous, then extracted with dichloromethane. The organic phase is dried over Na2SO4 and evaporated under reduced pressure. The residue is purified by column chromatography on silica gel (pet etheπethyl acetate = 5:1 ) to afford 1 ,1-dimethylethyl (2R,4R)-4-azido-2-(1-methylethyl)-1 -pyrrolidinecarboxylate (1.4 g, 22.6
%). 1H NMR(CDCI3) δ 0.85 (m, 6H), 1.45 (s, 9H), 1.70 (m, 1 H), 2.19 (m, 2H), 2.98 (m,
1 H), 3.65 (m, 1 H), 3.95 (m, 2H). Intermediate 150 1,1-dimethylethyl (2R,4R)-4-amino-2-(1-methylethyl)-1- pyrrolidinecarboxylate
Figure imgf000099_0001
The mixture of 1 ,1-dimethylethyl (2R,4R)-4-azido-2-(1-methylethyl)-1- pyrrolidinecarboxylate (1.4 g, 5.512 mmol) and Pd/C (300 mg) in ethyl acetate (70 ml.) is stirred for 2h under hydrogen atmosphere. Then the mixture is filtered and the filtrate is condensed to afford 1 ,1-dimethylethyl (2R,4R)-4-amino-2-(1-methylethyl)-1- pyrrolidinecarboxylate (1.3 g, 100 %) as a yellow solid. 1H NMR(CDCI3) δ 0.75 (s, 6H), 1.30 (m, 1 H), 1.39 (s, 9H), 2.05 (m, 1 H), 2.10-2.39 (m, H), 2.65 (m, 1 H), 3.28 (m, 1 H), 3.60-3.95 (m, 2H).
Intermediate 151 1,1-dimethylethyl (2/?,4/?)-4-({[(9H-fluoren-9- ylmethyl)oxy]carbonyl}amino)-2-(1 -methylethyl)-1 - pyrrolidinecarboxylate
Figure imgf000099_0002
NHFmoc
To a solution of (2/?,4/?)-4-amino-2-(1-methylethyl)-1 -pyrrolidinecarboxylate (1.2 g, 5.217 mmol) in ethyl acetate-water (8OmL, 1 :1 ) are added (9H-fluoren-9-yl)methyl carbonochloridate (1.6 g, 6.261 mmol) and potassium carbonate (1.4 g, 10.434 mmol). The mixture is stirred for 2h at 30 0C, and then partitioned between ethyl acetate and water. The organic phase is evaporated under reduced pressure, and the residue is purified by chromatograph on silica gel (pet etheπethyl acetate = 10:1 to 5:1 ) to afford 1 ,1- dimethylethyl (2R,4R)-4-({[(9/-/-fluoren-9-ylmethyl)oxy]carbonyl}amino)-2-(1-methylethyl)- 1 -pyrrolidinecarboxylate (1.9 g, 82.61 %) as a white solid. 1H NMR(CDCI3) δ 0.80 (m, 6H), 1.45 (s, 9H), 2.30 (m, 2H), 2.80 (m, 1 H), 3.79 (s, 1 H), 4.05 (s, 2H), 4.23 (m, 1 H), 4.45 (m, 1 H), 4.80 (s, 1 H), 7.30 (t, 2H), 7.40 (t, 2H), 7.56 (d, 2H), 7.75 (d, 2H).
Intermediate 152 1,1-Dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl) sulfonyl]amino}-2-({[(phenyloxy) carbonyljamino} methyl)-1-pyrrolidinecarboxylate
Figure imgf000100_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5- dibromophenyl)sulfonyl]amino}-1-pyrrolidinecarboxylate (530 mg, 1.033 mmol) in THF (3 ml), was added TEA (0.288 ml, 2.065 mmol) followed by phenyl chloroformate (0.143 ml, 1.136 mmol). The reaction mixture was stirred at room temperature overnight. It was then diluted with DCM and washed with 1 N HCI and saturated NaHCO3. The DCM layer was dried (Na2SO4) and evaporated to give the crude as a white solid (654 mg, 100%), which was used for next step without further purification
Intermediate 153 1 ,1 -Dimethylethyl (2R,4R)-4-({[5-chloro-2- (methyloxy)phenyl]sulfonyl}amino)-2- ({[(phenyloxy)carbonyl]amino}methyl)-1- pyrrolidinecarboxylate
Figure imgf000100_0002
To a solution of 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-({[5-chloro-2- (methyloxy)phenyl]sulfonyl}amino)-1-pyrrolidinecarboxylate (490 mg, 1.033 mmol) in THF (3 ml), was added TEA (0.325 ml, 2.334 mmol) followed by phenyl chloroformate (0.161 ml. 1.284 mmol). The reaction mixture was stirred at room temperature overnight. It was diluted with DCM and washed with 1 N HCI and saturated NaHCO3. The DCM layer was dried (Na2SO4) and evaporated to give the crude as a white solid (630 mg, 100%), which was used for next step without further purification.
Intermediate 154 1,1 -Dimethylethyl (2R,4R)-4-({[2,5-bis(methyloxy)phenyl] sulfonyl}amino)-2-({[(phenyloxy)carbonyl]amino}methyl) - 1 -pyrrolidinecarboxylate
Figure imgf000101_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-({[2,5- bis(methyloxy)phenyl]sulfonyl}amino)-1-pyrrolidinecarboxylate (473 mg, 1.138 mmol) in THF (15 ml), was added TEA (0.317 ml, 2.277 mmol) followed by phenyl chloroformate (0.157 ml. 1.252 mmol). The reaction mixture was stirred at room temperature overnight, diluted with DCM and washed with 1 N HCI and saturated NaHCOs. The DCM layer was dried (Na2SO4) and evaporated to give the crude as a white solid (458 mg, 75%), which was used for next step without further purification.
Example 1 2,5-Dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]benzenesulfonamide
Figure imgf000101_0002
1 ,1 -Dimethylethyl (2S,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-methyl-1 - pyrrolidinecarboxylate (0.1627 g, 0.326 mmol, 1 eq.) in 4 N HCI (3 ml_, 12 mmol) was mixed for 1 hour and the dioxane was evaporated under vacuum to yield a white solid which was diluted in DCM (~3 ml.) , mixed with DIEA (0.228 ml_, 1.31 mmol) and BrCN (0.327 ml_, 0.98 mmol). The resultant mixture was stirred at room temperature overnight; PS-trisamine (0.3275g, 4 eq.) was added and the mixture was stirred at room temperature for another 2 hours. The resin was filtered out, the solvent evaporated under vacuum and the residue purified by preparatory HPLC (without TFA) to afford the title compound (0.0805 g). LC-MS: m/z, 424 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.29 (1 H, d, J=2.26 Hz) 7.59 - 7.66 (1 H, m) 7.63 (1 H, q, J=8.45 Hz) 5.44 (1 H, d, J=7.78 Hz) 3.89 (1 H, dd, J=15.94, 7.91 Hz) 3.63 (1 H, dt, J=9.10, 6.37 Hz) 3.51 (1 H, dd, J=9.91 , 7.40 Hz) 3.26 (1 H, dd, J=9.91 , 7.15 Hz) 2.29 (1 H, dt, J=12.86, 6.49 Hz) 1.47 - 1.53 (1 H, m) 1.38 (3 H, d, J=6.27 Hz).
Example 2 2,5-Dichloro-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]benzenesulfonamide
Figure imgf000102_0001
1 ,1-Dimethylethyl (2S,4R)-4-{[(2,5-dichlorophenyl)sulfonyl]amino}-2-methyl-1- pyrrolidinecarboxylate (0.0149 g, 0.036 mmol, 1 eq.) was mixed with 4 N HCI in dioxane (8 mL) and stirred at room temperature overnight. The solvent was evaporated under vacuum to yield a white solid which was diluted in DCM (~1 mL), mixed with DIEA (0.025 mL, 0.15 mmol) and BrCN (0.36 mL, 0.1 1 mmol). The resultant mixture was stirred at room temperature for 6 hours, PS-trisamine (4 eq) was added and the mixture was stirred at room temperature overnight. The resin was filtered out, the solvent evaporated under vacuum, and the residue purified by preparatory HPLC (without TFA) to afford the title compound (0.0048 g). LC-MS: m/z, 334 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.02 (1 H, d, J=2.26 Hz) 7.41 - 7.49 (2 H, m) 5.20 - 5.27 (1 H, m) 3.79 - 3.86 (1 H, m) 3.54 (1 H, ddd, J=9.16, 6.27, 6.15 Hz) 3.43 (1 H, dd, J=9.79, 7.28 Hz) 3.16 (1 H, dd, J=9.91 , 7.15 Hz) 2.20 (1 H, dt, J=12.86, 6.49 Hz) 1.37 - 1.43 (1 H, m) 1.29 (3 H, d, J=6.27 Hz).
Example 3 N-[(3R,5S)-1-Cyano-5-methyl-3-pyrrolidinyl]-2,5-bis(methyloxy)benzenesulfonamide
Figure imgf000102_0002
1 , 1 -Dimethylethyl (2S,4R)-4-({[2,5-bis(methyloxy)phenyl]sulfonyl}amino)-2-methyl-1 - pyrrolidinecarboxylate (0.0615 g, 0.15 mmol, 1eq.) was mixed with 4 N HCI (3 ml_). The reaction mixture was stirred at room temperature for 12 hours, the solvent evaporated and the resulting solid was dissolved in DCM (~3 ml_). To the resultant mixture was added DIEA (0.32 ml_, 0.19 mmol) and BrCN (0.47 ml_, 0.14 mmol). The resultant mixture was stirred for 4 hours at room temperature and then PS-trisamine (4 eq.) was added to quench the reaction. The reaction was stirred for another 2 hours at room temperature, filtered, concentrated and purified by preparatory HPLC (without TFA) to afford the title compound (0.0252 g). LC-MS: m/z, 326 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 7.43 (1 H, d, J=2.27 Hz) 7.12 (1 H, dd, J=8.81 , 2.27 Hz) 7.02 (1 H, d, J=9.06 Hz) 5.37 (1 H, d, J=7.81 Hz) 3.97 (3 H, s) 3.85 - 3.89 (1 H, m) 3.83 (3 H, s) 3.54 - 3.61 (1 H, m) 3.40 (1 H, t, J=8.44 Hz) 3.17 (1 H, t) 2.21 (1 H, ddd, J=12.72, 6.55, 6.42 Hz) 1.42 (1 H, q) 1.33 (3 H, d, J=6.04 Hz)
Example 4
3-Bromo-N-[(3R,5S)-1 -cyano-5-methyl-3-pyrrolidinyl]benzenesulfonamide
Figure imgf000103_0001
Example 4 was prepared using the general procedure described above for Example 3, replacing 1 ,1 -dimethylethyl (2S,4R)-4-({[2,5-bis(methyloxy)phenyl]sulfonyl}amino)-2- methyl-1 -pyrrolidinecarboxylate (0.0615 g, 0.15 mmol)) with 1 ,1 -dimethylethyl (2S,4R)-4-
{[(3-bromophenyl)sulfonyl]amino}-2-methyl-1 -pyrrolidinecarboxylate (0.1351 g, 0.32 mmol) to afford the title compound (0.0465 g). LC-MS: m/z, 345 (M+H). 1 H NMR (400 MHz,
CHLOROFORM-d) δ ppm 8.02 (1 H, s) 7.81 (1 H, d, J=7.55 Hz) 7.75 (1 H, d, J=8.06 Hz) 7.44 (1 H, t, J=7.81 Hz) 5.88 (1 H, d, J=6.80 Hz) 3.80 - 3.88 (1 H, m) 3.58 - 3.68 (1 H, m)
3.52 (1 H, t, J=8.56 Hz) 3.23 (1 H, t, J=8.44 Hz) 2.25 (1 H, dt, J=12.59, 6.29 Hz) 1.46 (1 H, q) 1.34 (3 H, d, J=6.04 Hz)
Example 5 2-Bromo-N-[(3R,5S)-1 -cyano-5-methyl-3-pyrrolidinyl]-
5-(trifluoromethyl)benzenesulfonamide
Figure imgf000104_0001
Example 5 was prepared using the general procedure described above for Example 3, replacing 1 ,1-dimethylethyl (2S,4R)-4-({[2,5- bis(methyloxy)phenyl]sulfonyl}amino)-2-methyl-1-pyrrolidinecarboxylate (0.0615 g, 0.15 mmol)) with 1 ,1-dimethylethyl (2S,4R)-4-({[2-bromo-5-
(trifluoromethyl)phenyl]sulfonyl}amino)-2-methyl-1-pyrrolidinecarboxylate (0.1206 g, 0.25 mmol) to afford the title compound (0.0512 g). LC-MS: m/z, 413 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.39 (s, 1 H) 7.93 (d, J=8.31 Hz, 1 H) 7.72 (d, J=8.06 Hz, 1 H) 5.82 (d, J=7.05 Hz, 1 H) 3.87 - 3.94 (m, 1 H) 3.59 - 3.65 (m, 1 H) 3.52 (t, J=8.56 Hz, 1 H) 3.23 - 3.34 (m, 1 H) 2.27 (ddd, J=12.72, 6.55, 6.42 Hz, 1 H) 1.44 - 1.58 (m, 1 H) 1.36 (d, J=6.04 Hz, 3 H)
Example 6
2-Chloro-N-[(3R,5S)-1 -cyano-5-methyl-3-pyrrolidinyl]-
5-(trifluoromethyl)benzenesulfonamide
Figure imgf000104_0002
Example 6 was prepared using the general procedure described above for Example 3, replacing 1 , 1 -dimethylethyl (2S,4R)-4-({[2,5-bis(methyloxy)phenyl]sulfonyl}amino)-2- methyl-1-pyrrolidinecarboxylate (0.0615 g, 0.15 mmol)) with 1 ,1-dimethylethyl (2S,4R)-4- ({P-chloro-δ-^rifluoromethyOphenyOsulfonylJamino^-methyl-i-pyrrolidinecarboxylate
(0.2066 g, 0.47 mmol) to afford the title compound (0.0050 g). LC-MS: m/z, 368 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.34 (br. s., 1 H) 7.81 (d, J=8.31 Hz, 1 H) 7.68 - 7.75 (m, 1 H) 6.12 (br. s., 1 H) 3.90 (qd, J=7.34, 7.18 Hz, 1 H) 3.55 - 3.66 (m, 1 H) 3.51 (t, J=8.44 Hz, 1 H) 3.29 (t, J=8.44 Hz, 1 H) 2.22 (dt, J=12.59, 6.29 Hz, 1 H) 1.52 (t, J=9.95 Hz, 1 H) 1.33 (d, J=6.04 Hz, 3 H)
Example 7
5-Bromo-N-[(3R,5S)-1 -cyano-5-methyl-3-pyrrolidinyl]-
2-(methyloxy)benzenesulfonamide
Figure imgf000105_0001
Example 7 was prepared using the general procedure described above for Example 3, replacing 1 ,1-dimethylethyl (2S,4R)-4-({[2,5-bis(methyloxy)phenyl]sulfonyl}amino)-2- methyl-1-pyrrolidinecarboxylate (0.0615 g, 0.15 mmol)) with 1 ,1-dimethylethyl (2S,4R)-4-
({[5-bromo-2-(methyloxy)phenyl]sulfonyl}amino)-2-methyl-1-pyrrolidinecarboxylate (0.1285 g, 0.28 mmol) to afford the title compound (0.0773 g). LC-MS: m/z, 375 (M+H). 1 H NMR
(400 MHz, CHLOROFORM-d) δ ppm 8.02 (s, 1 H) 7.69 (d, J=8.56 Hz, 1 H) 6.97 (d, J=8.81 Hz, 1 H) 5.53 (d, J=7.55 Hz, 1 H) 4.00 (s, 3 H) 3.82 - 3.89 (m, 1 H) 3.56 - 3.63 (m,
1 H) 3.44 (t, J=8.56 Hz, 1 H) 3.18 (t, J=8.31 Hz, 1 H) 2.20 (dt, J=12.78, 6.33 Hz, 1 H) 1.37
- 1.49 (m, 1 H) 1.33 (d, J=6.04 Hz, 3 H)
Example 8 5-Bromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-2,4-ifluorobenzenesulfonamide
Figure imgf000105_0002
A mxiture of 1 ,1-dimethylethyl (2S,4R)-4-{[(5-bromo-2,4-difluorophenyl)sulfonyl]amino}-2- methyl-1-pyrrolidinecarboxylate (0.140 g, 0.31 mmol, 1 eq.) in 4 N HCI in dioxane (3 ml.) was stirred for 2 hours and concentrated under vacuum. The orange oil obtained was diluted in DCM (~5 ml.) and DIEA (0.22 ml_, 1.24 mmol) was added. To the resultant mixture BrCN (0.31 ml_, 0.93 mmol) was added and the mixture was stirred at room temperature overnight. To the resultant mixture PS-trisamine (4 eq) was added and stirred for another 2 hours, filtered, concentrated and purified by preparatory HPLC (without TFA) to afford the title compound (0.046 g). LC-MS: m/z, 381 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.05 (t, J=7.40 Hz, 1 H) 7.02 (dd, J=9.54, 7.78 Hz, 1 H) 5.68 (br. s., 1 H) 3.89 (br. s., 1 H) 3.54 - 3.60 (m, J=6.27, 3.51 , 3.14, 3.14 Hz, 1 H) 3.51 (dd, J=9.79, 7.28 Hz, 1 H) 3.21 (dd, J=9.91 , 7.15 Hz, 1 H) 2.22 (dt, J=12.86, 6.49 Hz, 1 H) 1.42 (dt, J=12.80, 9.16 Hz, 1 H) 1.29 (d, J=6.27 Hz, 3 H)
Example 9
N-[(3R,5S)-1-Cyano-5-methyl-3-pyrrolidinyl]-2,3,5-trifluorobenzenesulfonamide
Figure imgf000106_0001
Example 9 was prepared using the general procedure described above for Example 8, replacing 1 ,1-dimethylethyl (2S,4R)-4-{[(5-bromo-2,4-difluorophenyl)sulfonyl]amino}-2- methyl-1-pyrrolidinecarboxylate (0.140 g, 0.31 mmol) with 1 ,1-dimethylethyl (2S,4R)-2- methyl-4-{[(2,4,5-trifluorophenyl)sulfonyl]amino}-1-pyrrolidinecarboxylate (0.0942 g,
0.24 mmol) to afford the title compound (9 mg). LC-MS: m/z, 320 (M+H). 1 H NMR (400
MHz, CHLOROFORM-d) δ ppm 7.70 (td, J=8.66, 6.53 Hz, 1 H) 7.07 (td, J=9.29, 5.77 Hz, 1 H) 5.27 (d, J=6.78 Hz, 1 H) 3.85 - 3.96 (m, 1 H) 3.53 - 3.60 (m, J=6.27, 3.51 , 3.14, 3.14
Hz, 1 H) 3.51 (dd, J=9.91 , 7.40 Hz, 1 H) 3.20 (dd, J=9.79, 7.03 Hz, 1 H) 2.24 (dt, J=12.86,
6.49 Hz, 1 H) 1.40 (dt, J=12.80, 9.03 Hz, 1 H) 1.30 (d, J=6.27 Hz, 3 H)
Example 10 2,5-Dibromo-N-{(3R,5R)-1 -cyano-5-[(methyloxy)methyl]- 3-pyrrolidinyl}benzenesulfonamide
Figure imgf000107_0001
. , 1 -Dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-[(methyloxy)methyl]- 1-pyrrolidinecarboxylate (0.159 g, 0.30 mmol, 1 eq.) was mixed for 1 hour at room temperature with 4 N HCI in dioxane (3 ml_). The dioxane was removed under vacuum to yield a white solid which was diluted in DCM (-15 ml.) and DIEA (0.2 ml_, 0.12 mmol). BrCN (0.3 ml_, 0.90 mmol) was added and the resultant mixture was stirred at room temperature for 1.5 hours. PS-trisamine (4 eq.) was added and the mixture was stirred for another 2 hours at room temperature, filtered, concentrated and purified by preparatory HPLC (without TFA) to afford the title compound as a white solid (0.0535 g). LC-MS: m/z, 454 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.25 (1 H, d, J=2.51 Hz) 7.62 (1 H, d, J=8.28 Hz) 7.53 - 7.57 (1 H, m, J=8.53, 2.51 Hz) 7.04 (1 H, d, J=9.29 Hz) 3.94 -
4.02 (1 H, m, J=7.25, 7.25, 5.33, 1.76 Hz) 3.83 (1 H, dq, J=10.20, 2.29 Hz) 3.74 (1 H, dd, J=10.79, 2.01 Hz) 3.53 (3 H, s) 3.46 (1 H, dd, J=10.79, 2.01 Hz) 3.42 (1 H, dd, J=10.16, 5.14 Hz) 3.26 (1 H, dt, J=10.29, 1.63 Hz) 2.34 (1 H, td, J=7.03, 3.01 Hz) 1.89 (1 H, dd, J=14.18, 2.38 Hz)
Example 11
2,5-Dichloro-N-{(3R,5R)-1-cyano-5-[(methyloxy)methyl]-3- pyrrolidinyljbenzenesulfonamide
Figure imgf000107_0002
Example 10 was prepared using the general procedure described above for Example 11 , replacing 1 ,1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2- [(methyloxy)methyl]-1-pyrrolidinecarboxylate (0.159 g, 0.30 mmol) with 1 ,1 -dimethylethyl (2R,4R)-4-{[(2,5-dichlorophenyl)sulfonyl]amino}-2-[(methyloxy)methyl]-1- pyrrolidinecarboxylate (0.144 g, 0.33 mmol) to afford the title compound as a colorless oil (0.0146 g). LC-MS: m/z, 365 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.03 (1 H, d, J=1.51 Hz) 7.46 - 7.49 (2 H, m) 7.01 (1 H, d, J=8.78 Hz) 3.93 - 4.00 (1 H, m) 3.80 (1 H, dd, J=10.04, 2.51 Hz) 3.66 - 3.73 (1 H, m) 3.49 (3 H, s) 3.38 - 3.46 (2 H, m) 3.23 (1 H, dd, J=10.29, 1.51 Hz) 2.30 (1 H, ddd, J=13.99, 10.10, 7.28 Hz) 1.84 (1 H, d, J=1.51 Hz)
Example 12
2-Bromo-N-{(3R,5R)-1-cyano-5-[(methyloxy)methyl]-3-pyrrolidinyl}-5-
(trifluoromethyl)benzenesulfonamide
Figure imgf000108_0001
Example 12 was prepared using the general procedure described above for Example 10, replacing 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-
[(methyloxy)methyl]-1 -pyrrolidinecarboxylate (0.159 g, 0.30 mmol) with 1 ,1-dimethylethyl (2R,4R)-4-({[2-bromo-5-(trifluoromethyl)phenyl]sulfonyl}amino)-2-[(methyloxy)methyl]-1- pyrrolidinecarboxylate (0.129 g, 0.25 mmol) to afford the title compound as a colorless liquid oil (0.0248 g). LC-MS: m/z, 443 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.30 (1 H, s) 7.84 (1 H, d, J=8.03 Hz) 7.57 - 7.65 (1 H, m) 7.06 (1 H, d, J=9.29 Hz) 3.93 (1 H, td, J=3.45, 1.63 Hz) 3.74 - 3.82 (1 H, m) 3.68 (1 H, dd, J=10.79, 2.01 Hz) 3.47 (3 H, s) 3.40 (1 H, dd, J=10.67, 1.88 Hz) 3.35 (1 H, dd, J=10.16, 4.89 Hz) 3.17 - 3.24 (1 H, m) 2.28 (1 H, td, J=7.03, 3.26 Hz) 1.84 (1 H, d, J=14.05 Hz)
Example 13
2,5-Dichloro-N-{(3R,5R)-1 -cyano-5-[(phenyloxy)methyl]-
3-pyrrolidinyl}benzenesulfonamide
Figure imgf000109_0001
1 , 1 -dimethylethyl (2R,4R)-4-{[(2,5-dichlorophenyl)sulfonyl]amino}-2-[(phenyloxy)methyl]-1 - pyrrolidinecarboxylate (0.0545 g, 0.11 mmol, 1eq.) was mixed for 1.5 hours in 4 N HCI in dioxane (3 ml_). The solvent was removed under vacuum to yield a white solid which was diluted in DCM (~1 ml.) and DIEA (0.77 μl_, 0.44 mmol). To the resultant mixture BrCN (0.11 ml_, 0.33 mmol) was added and stirred at room temperature overnight. PS-trisamine (4 eq.) was added and the resultant mixture was stirred for another 2 hours at room temperature, filtered, concentrated and purified by preparatory HPLC without TFA to afford the title compound (0.00071 g). LC-MS: m/z, 427 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.13 (1 H, d, J=2.51 Hz) 7.46 - 7.53 (2 H, m) 7.37 (2 H, dd, J=8.78, 7.53 Hz) 7.03 - 7.11 (2 H, m) 6.77 (1 H, d, J=9.29 Hz) 4.35 (1 H, dd, J=10.29, 2.26 Hz) 4.04 - 4.10 (2 H, m, J=7.31 , 4.75, 4.75, 2.26 Hz) 4.04 - 4.10 (1 H, m) 4.02 (1 H, d, J=2.51 Hz) 3.49 (1 H, dd, J=10.29, 5.02 Hz) 3.36 (1 H, ddd, J=10.48, 1.82, 1.51 Hz) 2.48 (1 H, ddd, J=14.05, 9.91 , 7.15 Hz) 2.01 - 2.10 (1 H, m)
Example 14
2,5-Dibromo-N-{(3R,5R)-1 -cyano-5-[(phenyloxy)methyl]-
3-pyrrolidinyl}benzenesulfonamide
Figure imgf000109_0002
Example 14 was prepared using the general procedure described above for Example 13, replacing 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dichlorophenyl)sulfonyl]amino}-2-
[(phenyloxy)methyl]-1-pyrrolidinecarboxylate (0.0545 g, 0.11 mmol) with 1 1 ,1- dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-[(phenyloxy)methyl]-1- pyrrolidinecarboxylate (0.063 g, 0.11 mmol) to afford the title compound (0.0053 g). LC- MS: m/z, 516 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.31 (1 H, d, J=2.26 Hz) 7.55 - 7.63 (2 H, m) 7.36 (1 H, d, J=7.28 Hz) 7.34 - 7.41 (1 H, m) 7.06 (3 H, d, J=8.78 Hz) 6.83 (1 H, d, J=9.03 Hz) 4.32 - 4.38 (1 H, m) 4.02 - 4.09 (3 H, m) 3.48 (1 H, dd, J=10.29, 5.02 Hz) 3.33 - 3.39 (1 H, m) 2.48 (1 H, td, J=7.09, 2.89 Hz) 2.09 (1 H, d, J=14.31 Hz)
Example 15
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
2,2-dimethylpropanoate
Figure imgf000110_0001
1 , 1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-{[(2,2- dimethylpropanoyl)oxy]methyl}-1-pyrrolidinecarboxylate (0.075 g, 0.12 mmol, 1 eq.) was mixed for 2 hours at room temperature with 4 N HCI in dioxane (2 ml_). The solvent was removed under vacuum to yield a white powder which was diluted in DCM (~5 ml.) and DIPEA (0.087 ml_, 0.50 mmol. BrCN (0.125 ml_, 0.375 mmol) was added and the resultant mixture stirred at room temperature overnight. PS-trisamine (4 eq.) was added and the resultant mixture was stirred for another 2 hours at room temperature, filtered, concentrated in vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.008 g). LC-MS: m/z, 524 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.15 (1 H, d, J=2.01 Hz) 7.45 - 7.52 (2 H, m) 5.44 (1 H, br. s.) 4.14 (1 H, dd, J=11.92, 4.14 Hz) 3.96 - 4.02 (1 H, m) 3.69 - 3.81 (2 H, m) 3.42 (1 H, dd, J=10.04, 6.53 Hz) 3.16 (1 H, dd, J=10.04, 6.53 Hz) 2.15 (1 H, t, J=7.28 Hz) 1.54 (1 H, dt, J=13.30, 7.53 Hz) 1.11 (9 H, s) Example 16
((2R,4R)-1-Cyano-4-{[(2,5-dichlorophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
2,2-dimethylpropanoate
Figure imgf000111_0001
1 , 1 -dimethylethyl (2R,4R)-4-{[(2,5-dichlorophenyl)sulfonyl]amino}-2-{[(2,2- dimethylpropanoyl)oxy]methyl}-1-pyrrolidinecarboxylate (0.157 g, 0.31 mmol, 1 eq.) was mixed for 1.5 hours at room temperature with 4 N HCI in dioxane (1 ml_). The crude was concentrated under vacuum to yield a white solid which was diluted in DCM (3 ml.) and DIEA (0.21 ml_, 1.23 mmol ). BrCN (0.31 ml_, 0.92 mmol) was added and the resultant mixture was stirred at room temperature. After 16 hours, more BrCN (1 eq.) was added. After stirring for 2 more hours, PS-trisamine (5 eq.) was added and the mixture was stirred for another 1 hour at room temperature, filtered and purified by preparatory HPLC (without TFA) to afford the title compound (37.1 mg). LC-MS: m/z, 435 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.09 (1 H, d, J=2.51 Hz) 7.46 - 7.58 (2 H, m) 5.94 (1 H, d, J=7.28 Hz) 4.24 (1 H, dd, J= 11.80, 4.02 Hz) 4.07 - 4.16 (1 H, m) 3.82 - 3.96 (2 H, m) 3.55 (1 H, dd, J=9.91 , 6.90 Hz) 3.30 (1 H, dd, J=10.04, 7.03 Hz) 2.28 (1 H, t, J=13.93 Hz) 1.68 (1 H, dt, J=13.30, 7.91 Hz) 1.23 (9 H, s)
Example 17
[(2R,4R)-4-({[5-Chloro-2-(methyloxy)phenyl]sulfonyl}amino)-1 -cyano-2- pyrrolidinyljmethyl 2,2-dimethylpropanoate
Figure imgf000111_0002
1 , 1 -dimethylethyl (2R,4R)-4-{[(2,5-dichlorophenyl)sulfonyl]amino}-2-{[(2,2- dimethylpropanoyl)oxy]methyl}-1-pyrrolidinecarboxylate (0.133 g, 0.26 mmol, 1 eq.) was mixed with in 4 N HCI in dioxane (1 ml.) for 1.5 hours at room temperature. The crude was concentrated under vacuum to yield a white solid which was diluted in DCM (3 ml.) and DIEA (0.18 ml_, 1.05 mmol). BrCN (0.26 ml_, 0.79 mmol) was added and the resultant mixture stirred at room temperature. After stirring for 16 hours, BrCN (1 eq.) was added the resultant mixture. PS-trisamine (5 eq.) was added and stirred for another 1 hour at room temperature, then the mixture was filtered and purified by preparatory HPLC (without TFA) to afford the title compound (40.6 mg). LC-MS: m/z, 430 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 7.81 (1 H, d, J=2.76 Hz) 7.49 (1 H, dd, J=8.91 , 2.64 Hz) 6.98 (1 H, d, J=8.78 Hz) 6.50 (1 H, br. s.) 4.13 (1 H, dd, J= 1 1.80, 4.02 Hz) 4.05 (1 H, dd, J=11.80, 6.78 Hz) 3.93 (3 H, s) 3.75 - 3.85 (2 H, m) 3.44 (1 H, dd, J=9.91 , 6.90 Hz) 3.15 - 3.20 (1 H, m) 2.16 (1 H, ddd, J=13.61 , 7.28, 6.96 Hz) 1.56 (1 H, dt, J=13.30, 7.78 Hz) 1.17 (9 H, s)
Example 18 2-Bromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-5-nitrobenzenesulfonamide
Figure imgf000112_0001
1 ,1 -dimethylethyl (2S,4R)-4-{[(2-bromo-5-nitrophenyl)sulfonyl]amino}-2-methyl-1- pyrrolidinecarboxylate (51.3 mg, 0.11 mmol, 1 eq.) was mixed for 2 hours with 4 N HCI in dioxane (0.57 mL). The solvent was concentrated under vacuum to yield a brown solid which was diluted in DCM (2 mL) and DIEA (0.79 mL, 0.46 mmol). To the resultant mixture BrCN (0.073 mL, 0.22 mmol) was added and stirred at room temperature overnight. The reaction was quenched with PS-trisamine (4 eq.) and stirred for another 3 hours at room temperature, filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (20 mg). LC-MS: m/z, 390 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.43 (1 H, d, J=2.26 Hz) 7.90 (1 H, dd, J=8.28, 2.26 Hz) 7.78 - 7.84 (1 H, m) 5.45 (1 H, d, J=7.78 Hz) 3.77 - 3.84 (1 H, m) 3.53 (1 H, dt, J=9.03, 6.27 Hz) 3.44 (1 H, dd, J=10.04, 7.28 Hz) 3.19 (1 H, dd, J=9.91 , 6.90 Hz) 2.18 (1 H, dt, J=12.86, 6.49 Hz) 1.40 (1 H, dt, J=12.80, 9.03 Hz) 1.29 (3 H, d, J=6.27 Hz)
Example 19
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl phenylcarbamate
1 , 1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2- ({[(phenylamino)carbonyl]oxy}methyl)-1-pyrrolidinecarboxylate (0.06 g, 0.95 mmol, 1 eq.) was mixed for 3 hours with 4 N HCI (0.237 ml_). The solvent was concentrated under vacuum to yield a white powder which was diluted in DCM (2 ml.) and DIEA (66 μl_, 0.38 mmol). BrCN (47 μl_, 0.142 mmol) was added and the resultant mixture was stirred at room temperature overnight. PS-trisamine (4 eq.) was added and the resultant mixture was stirred for another 1.5 hours at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound
(0.0233 mg). LC-MS: m/z, 559 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm
8.28 (1 H, d, J=2.26 Hz) 7.56 - 7.63 (2 H, m) 7.43 (2 H, d, J=7.78 Hz) 7.33 (2 H, t, J=8.03
Hz) 7.28 (1 H, s) 7.10 (1 H, t, J=7.40 Hz) 6.1 1 (1 H, br. s.) 4.46 (1 H, dd, J=12.05, 3.26 Hz) 4.26 (1 H, dd, J=12.05, 5.02 Hz) 3.92 - 3.99 (2 H, m) 3.53 (1 H, dd, J=10.16, 5.90 Hz)
3.39 (1 H, dd, J=10.16, 4.39 Hz) 2.33 - 2.37 (1 H, m) 1.93 (1 H, ddd, J=13.55, 5.40, 5.14
Hz)
Example 20 ((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl (phenylmethyl)carbamate
Figure imgf000114_0001
To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-
[({[(phenylmethyl)amino]carbonyl}oxy)methyl]-1-pyrrolidinecarboxylate (Intermediate 45) (0.0723 g, 0.112 mmol) in dioxane (0.5 ml.) was added 4 N HCI (0.70 ml_). After stirring for 2 hours, the solvent was removed under vacuum to afford the crude secondary amine.
A mixture of the crude material previously obtained in DCM (2 ml.) was neutralized by the addition of DIEA (0.072 g, 0.55 mmol, 4 eq). BrCN (0.139 ml_, 0.42 mmol, 3 eq) was added and the resultant mixture was stirred at room temperature for 2 hours. PS- trisamine (4 eq) was added and the mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0315 g). LC-MS: m/z, 573 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.26 (d, J=2.26 Hz, 1 H) 7.60 - 7.63 (m, 1 H) 7.56 - 7.60 (m, 1 H) 7.25 - 7.41 (m, 5 H) 6.14 (d, J=6.27 Hz, 1 H) 5.49 (t, J=5.65 Hz, 1 H) 4.40 (dd, J=6.02, 2.26 Hz, 2 H) 4.35 (dd, J=11.92, 3.64 Hz, 1 H) 4.20 (dd, J=1 1.92, 5.40 Hz, 1 H) 3.87 - 3.94 (m, 2 H) 3.49 (dd, J=10.04, 6.02 Hz, 1 H) 3.34 (dd, J=10.04, 4.77 Hz, 1 H) 2.22 - 2.38 (m, 1 H) 1.82 (ddd, J=13.36, 5.71 , 5.52 Hz, 1 H)
Example 21
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
{[2-(methyloxy)phenyl]methyl}carbamate
Figure imgf000114_0002
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl {[2-(methyloxy)phenyl]methyl}carbamate (0.0752 g, 0.13 mmol, 1 eq.) in DCM (2 mL) was neutralized by the addition of DIEA (0.072 g, 0.55 mmol). BrCN (0.139 mL, 0.41 mmol) was added and the resultant mixture was stirred at room temperature for 2 hours. PS- trisamine (4 eq.) was added and the mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0315 g). LC-MS: m/z, 603 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.26 (d, J=2.01 Hz, 1 H) 7.59 - 7.63 (m, 1 H) 7.54 - 7.59 (m, 1 H) 7.25 - 7.32 (m, 2 H) 6.94 (t, J=7.53 Hz, 1 H) 6.89 (d, J=8.53 Hz, 1 H) 6.20 (d, J=6.02 Hz, 1 H) 5.60 (t, J=5.90 Hz, 1 H) 4.38 (d, J=6.27 Hz, 2 H) 4.31 (dd, J=12.05, 3.76 Hz, 1 H) 4.16 (dd, J=12.05, 5.02 Hz, 1 H) 3.80 - 3.92 (m, 5 H) 3.47 (dd, J=10.16, 5.90 Hz, 1 H) 3.32 (dd, J=10.04, 4.52 Hz, 1 H) 2.28 (ddd, J=13.80, 8.41 , 7.15 Hz, 1 H) 1.75 - 1.83 (m, 1 H)
Example 22
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl {[3- (methyloxy)phenyl]methyl}carbamate
Figure imgf000115_0001
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl {[3-
(methyloxy)phenyl]methyl}carbamate (Intermediate 62) (0.08 g, 0.14 mmol, 1 eq.) in DCM (2 mL) was neutralized by the addition of DIEA (0.072 g, 0.55 mmol). BrCN (0.139 mL, 0.41 mmol) was added and the resultant mixture was stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0361 g). LC-MS: m/z, 603 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.24 (d, J=2.26 Hz, 1 H) 7.54 - 7.62 (m, 1 H) 7.59 (t, J=8.78 Hz, 1 H) 7.26 (br. s., 1 H) 6.79 - 6.91 (m, 3 H) 6.25 - 6.35 (m, 1 H) 5.54 - 5.62 (m, 1 H) 4.34 (d, J=6.02 Hz, 2 H) 4.29 (d, J=3.26 Hz, 1 H) 4.15 - 4.22 (m, 1 H) 3.85 - 3.92 (m, 2 H) 3.80 (s, 3 H) 3.48 (dd, J=9.91 , 6.40 Hz, 1 H) 3.29 - 3.36 (m, 1 H) 2.21 - 2.31 (m, 1 H) 1.78 (br. s., 1 H)
Example 23
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
{[4-(methyloxy)phenyl]methyl}carbamate
Figure imgf000116_0001
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl {[4-(methyloxy)phenyl]methyl}carbamate (Intermediate 63) (0.0556 g, 0.096 mmol, 1 eq.) in DCM (2 ml.) was neutralized by the addition DIEA (0.072 g, 0.55 mmol). BrCN (0.139 ml_, 0.42 mmol) was added and the resultant mixture was stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0384 g). LC-MS: m/z, 603 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.17 (d, J=2.26 Hz, 1 H) 7.51 - 7.55 (m, 1 H) 7.47 - 7.51 (m, 1 H) 7.15 (m, J=8.53 Hz, 2 H) 6.79 (m, J=8.53 Hz, 2 H) 6.02 (br. s., 1 H) 5.33 (t, J=5.52 Hz, 1 H) 4.27 (d, J=3.51 Hz, 1 H) 4.24 (d, J=2.01 Hz, 2 H) 4.10 (dd, J=12.05, 5.27 Hz, 1 H) 3.76 - 3.84 (m, 2 H) 3.72 (s, 3 H) 3.40 (dd, J=10.04, 6.02 Hz, 1 H) 3.20 - 3.27 (m, 1 H) 2.16 - 2.27 (m, 1 H) 1.68 - 1.77 (m, 1 H)
Example 24
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
[2-(methyloxy)phenyl]carbamate
Figure imgf000116_0002
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl [2-
(methyloxy)phenyl]carbamate (Intermediate 64) (0.0304 g, 0.054 mmol, 1 eq.) in DCM (2 mL) was neutralized by the addition DIEA (0.072 g, 0.55 mmol). BrCN (0.139 mL, 0.42 mmol) was added and the resultant mixture was stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0134 g). LC-MS: m/z, 589 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.19 (d, J=2.26 Hz, 1 H) 7.51 - 7.54 (m, 1 H) 7.47 - 7.51 (m, 1 H) 7.19 (s, 1 H) 6.94 - 7.00 (m, 1 H) 6.87 - 6.92 (m, 1 H) 6.81 (dd, J=8.03, 1.25 Hz, 1 H) 5.86 (br. s., 1 H) 4.34 (dd, J=12.05, 4.02 Hz, 1 H) 4.19 - 4.25 (m, 1 H) 3.83 - 3.88 (m, 2 H) 3.81 (s, 3 H) 3.44 (dd, J=10.04, 6.02 Hz, 1 H) 3.28 (dd, J=10.04, 4.77 Hz, 1 H) 2.25 (ddd, J=13.68, 8.41 , 7.03 Hz, 1 H) 1.76 (ddd, J=13.61 , 5.83, 5.65 Hz, 1 H) 1.54 (s, 1 H)
Example 25
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
[3-(methyloxy)phenyl]carbamate
Figure imgf000117_0001
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
[3-(methyloxy)phenyl]carbamate (Intermediate 65) (0.0496 g, 0.88 mmol, 1 eq.) in DCM (2 mL) was neutralized by the addition of (0.072 g, 0.55 mmol). BrCN (0.139 mL, 0.41 mmol) was added and the resultant mixture was stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0397 g). LC-MS: m/z, 589 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.19 (d, J=2.26 Hz, 1 H) 7.51 - 7.54 (m, 1 H) 7.46 - 7.50 (m, 1 H) 7.19 (s, 1 H) 7.13 (t, J=8.28 Hz, 1 H) 7.03 (br. s., 1 H) 6.85 (d, J=7.78 Hz, 1 H) 6.56 (dd, J=8.28, 1.76 Hz, 1 H) 6.00 (d, J=6.78 Hz, 1 H) 4.37 (dd, J=12.05, 3.01 Hz, 1 H) 4.16 (dd, J=12.05, 5.02 Hz, 1 H) 3.81 - 3.89 (m, 2 H) 3.72 (s, 3 H) 3.44 (dd, J=10.29, 6.02 Hz, 1 H) 3.29 (dd, J=10.04, 4.52 Hz, 1 H) 2.20 - 2.30 (m, 1 H) 1.83 (dt, J=13.55, 5.52 Hz, 1 H)
Example 26 ((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl [4-(methyloxy)phenyl]carbamate
Figure imgf000118_0001
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl [4-(methyloxy)phenyl]carbamate (Intermediate 66) (0.0395 g, 0.070 mmol, 1 eq.) in DCM (2 ml.) was neutralized by the addition of DIEA (0.072 g, 0.55 mmol). BrCN (0.139 mL, 0.42 mmol) was added and stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the resulting mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0266 g). LC-MS: m/z, 589 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.28 (d, J=2.26 Hz, 1 H) 7.62 - 7.65 (m, 1 H) 7.57 - 7.61 (m, 1 H) 7.34 (m, J=8.53 Hz, 2 H) 7.05 (br. s., 1 H) 6.85 - 6.91 (m, 2 H) 6.02 (br. s., 1 H) 4.46 (dd, J=12.05, 3.26 Hz, 1 H) 4.26 (dd, J=12.17, 4.89 Hz, 1 H) 3.91 - 4.00 (m, 2 H) 3.81 (s, 3 H) 3.52 (dd, J=10.16, 5.65 Hz, 1 H) 3.35 - 3.42 (m, 1 H) 2.32 - 2.42 (m, 1 H) 1.91 - 1.98 (m, 1 H)
Example 27
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
[3-(trifluoromethyl)phenyl]carbamate
Figure imgf000118_0002
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl [3-(trifluoromethyl)phenyl]carbamate (Intermediate 68) (0.0746 g, 0.124 mmol, 1 eq.) in DCM (2 mL) was neutralized by the addition of DIEA (0.072 g, 0.55 mmol). BrCN (0.139 mL, 0.42 mmol) was added and the resulting mixture was stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the mixtures was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0462 g). LC-MS: m/z, 627 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.26 (d, J=2.26 Hz, 1 H) 7.76 (br. s., 1 H) 7.70 (s, 1 H) 7.58 - 7.61 (m, 1 H) 7.54 - 7.58 (m, 2 H) 7.40 (t, J=7.91 Hz, 1 H) 7.27 - 7.34 (m, 1 H) 6.27 (br. s., 1 H) 4.45 (dd, J=12.05, 3.01 Hz, 1 H) 4.26 (dd, J=1 1.92, 5.40 Hz, 1 H) 3.89 - 4.00 (m, 2 H) 3.55 (dd, J=10.04, 6.27 Hz, 1 H) 3.39 - 3.46 (m, 1 H) 2.28 - 2.38 (m, 1 H) 1.87 - 1.96 (m, 1 H)
Example 28
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl [4-(trifluoromethyl)phenyl]carbamate
Figure imgf000119_0001
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
[4-(trifluoromethyl)phenyl]carbamate (Intermediate 69) (0.0829 g, 0.138 mmol, 1 eq.) in DCM (2 mL) was neutralized by the addition DIEA (0.102 g, 0.79 mmol). BrCN (0.198 mL, 0.59 mmol) was added and the reaction mixture was stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0570 g). LC-MS: m/z, 627 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.27 (d, J=2.01 Hz, 1 H) 7.67 (s, 1 H) 7.61 (d, 1 H) 7.59 (d, J=2.26 Hz, 1 H) 7.55 (s, 4 H) 6.16 (d, J=6.02 Hz, 1 H) 4.48 (dd, J=12.05, 2.76 Hz, 1 H) 4.27 (dd, J=12.05, 5.02 Hz, 1 H) 3.93 - 4.00 (m, 2 H) 3.56 (dd, J=10.16, 5.90 Hz, 1 H) 3.43 (dd, J=10.16, 4.39 Hz, 1 H) 2.37 (ddd, J=13.80, 8.78, 6.53 Hz, 1 H) 1.98 (ddd, J=13.68, 5.40, 5.27 Hz, 1 H)
Example 29
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl (2-methylphenyl)carbamate
Figure imgf000120_0001
To 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-[({[(2- methylphenyl)amino]carbonyl}oxy)methyl]-1-pyrrolidinecarboxylate (Intermediate 54) (0.0178 g, 0.027 mmol, 1 eq.) in dioxane (0.5 mL) was added 4 N HCI (0.9 mL). The resulting mixture was stirred for 2 hours then the solvent was removed under vacuum to a give a crude residue which was dissolved in DCM (2 mL) and neutralized by addition of DIEA (0.102 g, 0.79 mmol). BrCN (0.198 mL, 0.59 mmol) was added and the mixture was stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the resulting mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0560 g). LC-MS: m/z, 573 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.16 (d, J=2.01 Hz, 1 H) 7.60 (br. s., 1 H) 7.49 - 7.52 (m, 1 H) 7.44 - 7.48 (m, 1 H) 7.07 - 7.15 (m, 2 H) 6.99 (t, J=7.15 Hz, 1 H) 6.71 (s, 1 H) 6.09 (br. s., 1 H) 4.26 - 4.32 (m, 1 H) 4.14 - 4.21 (m, 1 H) 3.78 - 3.85 (m, 2 H) 3.40 (dd, J=10.04, 6.27 Hz, 1 H) 3.24 (br. s., 1 H) 2.19 (s, 3 H) 2.15 - 2.25 (m, 1 H) 1.69 - 1.76 (m, 1 H)
Example 30 ((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl (3-methylphenyl)carbamate
Figure imgf000120_0002
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl (3-methylphenyl)carbamate (Intermediate 70) (0.0697 g, 0.127 mmol, 1 eq.) in DCM (2 mL) was neutralized by the addition of DIEA (0.102 g, 0.79 mmol). BrCN (0.198 mL, 0.59 mmol) was added and stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the resulting mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0622 g). LC-MS: m/z, 573 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.12 (d, J=2.26 Hz, 1 H) 7.44 - 7.48 (m, 1 H) 7.40 - 7.43 (m, 1 H) 7.10 (d, J=5.27 Hz, 2 H) 7.04 - 7.07 (m, 2 H) 6.76 (d, J=6.27 Hz, 1 H) 6.07 (br. s., 1 H) 4.28 (dd, J=12.05, 3.26 Hz, 1 H) 4.10 (dd, J= 1 1.92, 5.14 Hz, 1 H) 3.74 - 3.82 (m, 2 H) 3.38 (dd, J=10.04, 6.02 Hz, 1 H) 3.24 (dd, J=10.04, 5.02 Hz, 1 H) 2.19 (s, 3 H) 2.15 - 2.21 (m, 1 H) 1.70 - 1.79 (m, 1 H)
Example 31
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl 1 -naphthalenylcarbamate
Figure imgf000121_0001
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl naphthalenylcarbamate (Intermediate 71 ) (0.1 157 g, 0.198 mmol, 1 eq.) in DCM (2 mL) was neutralized by the addition DIEA (0.102 g, 0.79 mmol). BrCN (0.198 mL, 0.59 mmol) was added and the mixture was stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0449 g). LC-MS: m/z, 609 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.25 (d, J=1.76 Hz, 1 H) 7.99 (d, J=7.78 Hz, 1 H) 7.86 - 7.91 (m, 1 H) 7.77 - 7.84 (m, 1 H) 7.72 (d, J=8.03 Hz, 1 H) 7.56 (d, J=4.27 Hz, 1 H) 7.52 - 7.59 (m, 2 H) 7.46 - 7.53 (m, 2 H) 7.38 (br. s., 1 H) 6.12 (br. s., 1 H) 4.40 - 4.48 (m, 1 H) 4.29 (br. s., 1 H) 3.91 (br. s., 2 H) 3.47 (br. s., 2 H) 2.28 (br. s., 1 H) 1.84 (br. s., 1 H)
Example 32
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl 2-naphthalenylcarbamate
Figure imgf000121_0002
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl 2-naphthalenylcarbamate (Intermediate 72) (0.0879 g, 0.150 mmol, 1 eq.) in DCM (2 ml.) was neutralized by the addition of DIEA (0.102 g, 0.79 mmol). BrCN (0.198 ml_, 0.59 mmol) was added and the mixture was stirred at room temperature for 2 hours. PS- trisamine (4 eq.) was added and the resulting mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0409 g). LC-MS: m/z, 609 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.13 (d, J=2.26 Hz, 1 H) 7.86 (br. s., 1 H) 7.60 - 7.66 (m, 3 H) 7.40 - 7.45 (m, 1 H) 7.36 - 7.40 (m, 1 H) 7.23 - 7.35 (m, 4 H) 6.00 (br. s., 1 H) 4.33 (dd, J=12.05, 3.26 Hz, 1 H) 4.13 (dd, J=12.05, 5.02 Hz, 1 H) 3.74 - 3.83 (m, 2 H) 3.37 (dd, J=10.04, 6.02 Hz, 1 H) 3.25 (dd, J=10.04, 4.27 Hz, 1 H) 2.17 (ddd, J=13.74, 8.60, 6.78 Hz, 1 H) 1.78 (ddd, J=13.49, 5.58, 5.27 Hz, 1 H)
Example 33
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl) methyl ethylcarbamate
Figure imgf000122_0001
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl ethylcarbamate (Intermediate 73) (0.0871 g, 0.179 mmol, 1 eq.) in DCM (2 mL) was neutralized by the addition of DIEA (0.102 g, 0.79 mmol). BrCN (0.198 mL, 0.59 mmol) was added and the mixture was stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0430 g). LC-MS: m/z, 51 1 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.27 (d, J=2.51 Hz, 1 H) 7.61 - 7.66 (m, 1 H) 7.56 - 7.61 (m, 1 H) 6.26 (d, J=7.03 Hz, 1 H) 5.10 (br. s., 1 H) 4.28 - 4.35 (m, 1 H) 4.17 (dd, J=12.05, 5.52 Hz, 1 H) 3.86 - 3.95 (m, 2 H) 3.50 (dd, J=10.16, 5.90 Hz, 1 H) 3.36 (dd, J=10.04, 4.52 Hz, 1 H) 3.21 - 3.30 (m, 2 H) 2.32 (ddd, J=13.68, 8.66, 6.78 Hz, 1 H) 1.83 (ddd, J=13.61 , 5.46, 5.27 Hz, 1 H) 1.17 (t, J=7.15 Hz, 3 H) Example 34
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
(1 ,1-dimethylethyl)carbamate
Figure imgf000123_0001
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl (1 ,1-dimethylethyl)carbamate (Intermediate 74) (0.253 g, 0.492 mmol, 1 eq.) in DCM (2 ml.) was neutralized by the addition of DIEA (0.102 g, 0.79 mmol). BrCN (0.198 mL, 0.59 mmol) was added and the mixture was stirred at room temperature for 2 hours. PS- trisamine (4 eq.) was added and the mixtures was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0655 g). LC-MS: m/z, 539 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.26 (d, J=2.26 Hz, 1 H) 7.61 - 7.66 (m, 1 H) 7.56 - 7.60 (m, 1 H) 6.33 (br. s., 1 H) 5.06 (s, 1 H) 4.26 (dd, J=12.05, 3.51 Hz, 1 H) 4.11 (dd, J= 11.80, 4.02 Hz, 1 H) 3.85 - 3.93 (m, 2 H) 3.48 (dd, J=10.04, 5.77 Hz, 1 H) 3.32 - 3.38 (m, 1 H) 2.30 (ddd, J=13.87, 8.60, 6.90 Hz, 1 H) 1.83 (dt, J=13.55, 5.27 Hz, 1 H) 1.34 (s, 9 H)
Example 35 ((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl [2-(trifluoromethyl)phenyl]carbamate
Figure imgf000123_0002
To ((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl
[2-(trifluoromethyl)phenyl]carbamate (Intermediate 67) (0.069 g, 0.114 mmol, 1 eq.) in DCM (2 mL) was neutralized by the addition of DIEA (0.072 g, 0.55 mmol). BrCN (0.139 mL, 0.41 mmol) was added and the mixture was stirred at room temperature for 2 hours. PS-trisamine (4 eq.) was added and the mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0368 g). LC-MS: m/z, 627 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.26 (d, J=2.26 Hz, 1 H) 8.00 (d, J=8.03 Hz, 1 H) 7.60 - 7.63 (m, 2 H) 7.55 - 7.59 (m, 2 H) 7.26 (t, J=7.65 Hz, 1 H) 7.07 (br. s., 1 H) 5.99 (br. s., 1 H) 4.36 - 4.41 (m, 1 H) 4.29 - 4.35 (m, 1 H) 3.88 - 3.96 (m, 2 H) 3.54 (dd, J=10.16, 6.65 Hz, 1 H) 3.34 (dd, J=10.16, 6.15 Hz, 1 H) 2.27 - 2.35 (m, 1 H) 1.79 (ddd, J=13.55, 7.15, 6.90 Hz, 1 H)
Example 36
((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl cyclohexylcarbamate
Figure imgf000124_0001
1 ,1 -dimethylethyl (2S,4R)-4-{[(2,5-dibromo-3,6-difluorophenyl)sulfonyl]amino}-
2-methyl-1-pyrrolidinecarboxylate (Intermediate 76) (0.084 g, 0.156 mmol, 1 eq.) in DCM (2 mL) was neutralized by the addition of DIEA (0.102 g, 0.79 mmol). BrCN (0.198 mL, 0.59 mmol) was added and the mixture was stirred at room temperature for 2 hours. PS- trisamine (4 eq.) was added and the mixture was stirred overnight at room temperature then filtered, concentrated under vacuum and purified by preparatory HPLC (without TFA) to afford the title compound (0.0378 g). LC-MS: m/z, 564 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.19 (d, J=2.26 Hz, 1 H) 7.53 - 7.57 (m, 1 H) 7.48 - 7.52 (m, 1 H) 6.23 (br. s., 1 H) 4.94 (d, J=7.78 Hz, 1 H) 4.23 (dd, J=12.05, 3.26 Hz, 1 H) 4.07 (dd, J=12.05, 4.77 Hz, 1 H) 3.78 - 3.87 (m, 2 H) 3.37 - 3.45 (m, 2 H) 3.27 (dd, J=10.04, 4.27 Hz, 1 H) 2.24 (ddd, J=13.93, 8.66, 7.03 Hz, 1 H) 1.82 - 1.90 (m, 2 H) 1.77 (dt, J=13.55, 4.77 Hz, 1 H) 1.61 - 1 .68 (m, 2 H) 1 .49 - 1.56 (m, 1 H) 1 .21 - 1 .33 (m, 2 H) 1.08 - 1 .15 (m, 3 H)
Example 37 2,5-Dibromo-N-[(3R,5S)-1 -cyano-5-methyl-3-pyrrolidinyl]- 3,6-difluorobenzenesulfonamide
Figure imgf000125_0001
To a solution of 1 ,1-dimethylethyl (2S,4R)-4-{[(2,5-dibromo-3,6- difluorophenyl)sulfonyl]amino}-2-methyl-1-pyrrolidinecarboxylate (263 mg, 0.5 mmol) in dioxane (5 ml.) was added 4 M HCI in dioxane (10 ml_). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (10 ml_). To the resultant mixture, DIEA (0.55 ml_, 2 mmol) and CNBr solution (0.5 ml_, 1.5 mmol) were added and stirred for an additional 1 hour at room temperature. PS- trisamine (1 g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford the title compound as a brown oil (-130 mg). LC-MS: m/z, 458 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.39 (d, J=6.27 Hz, 3 H) 1.51 - 1.57 (m, 1 H) 2.37 (dt, J=12.86, 6.49 Hz, 1 H) 3.35 (dd, J=9.91 , 7.15 Hz, 1 H) 3.62 - 3.69 (m, 1 H) 3.64 (dd, J=9.79, 7.28 Hz, 1 H) 4.06 (dd, J=8.78, 7.03 Hz, 1 H) 5.19 (br. s., 1 H) 7.64 (dd, J=6.78, 5.77 Hz, 1 H)
Example 38
2,5-Dibromo-N-{(3R,5R)-1 -cyano-5-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]-
3-pyrrolidinyl}benzenesulfonamide
Figure imgf000125_0002
To a solution of 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-[(1 ,3- dioxo-1 ,3-dihydro-2H-isoindol-2-yl)methyl]-1-pyrrolidinecarboxylate (50 mg, 0.08 mmol) in dioxane (5 mL) was added 4 M HCI in dioxane (10 mL). The reaction mixture was stirred at room temperature for 1 hour then evaporated and re-dissolved in DCM (10 mL). DIEA (70 μl_, 0.4 mmol) and a 3 N BrCN solution in DCM (0.1 ml_, 0.3 mmol) were added to the resultant mixture, which was then stirred for an additional 1 hour at room temperature. PS-trisamine (1 g) was added and the mixture was stirred for 1 hour at room temperature then filtered, concentrated and purified by preparatory HPLC (without TFA) to afford the title compound as a white solid (-29 mg). LC-MS: m/z, 567 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.85 (d, J=13.80 Hz, 1 H) 2.30 (d, J=6.78 Hz, 1 H) 3.46 - 3.51 (m, 1 H) 3.52 - 3.57 (m, 1 H) 3.91 (dd, J=10.16, 6.40 Hz, 2 H) 4.04 - 4.10 (m, 2 H) 6.15 (d, J=6.27 Hz, 1 H) 7.58 - 7.62 (m, 1 H) 7.63 - 7.66 (m, 1 H) 7.78 (dd, J=5.40, 3.14 Hz, 2 H) 7.90 (s, 1 H) 7.92 (d, J=3.01 Hz, 1 H) 8.29 (d, J=2.26 Hz, 1 H)
Example 39
N-[((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2- pyrrolidinyl)methyl]benzamide
Figure imgf000126_0001
Example 39 was prepared using the general procedure described above for Example 37, replacing 1 ,1-dimethylethyl (2S,4R)-4-{[(2,5-dibromo-3,6-difluorophenyl)sulfonyl]amino}-2- methyl-1-pyrrolidinecarboxylate (263 mg, 0.5 mmol) with 1 ,1-dimethylethyl (2R,4R)-4- {[(2,5-dibromophenyl)sulfonyl]amino}-2-{[(phenylcarbonyl)amino]methyl}-1- pyrrolidinecarboxylate (62 mg, 0.1 mmol) to afford the title compound (-31 mg). LC-MS: 541 m/z, (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.89 (d, J=13.55 Hz, 1 H) 2.25 (d, J=7.03 Hz, 1 H) 3.50 - 3.56 (m, 1 H) 3.57 - 3.62 (m, 1 H) 3.69 (dd, J=8.41 , 6.40 Hz, 1 H) 3.87 (dd, J=12.30, 5.52 Hz, 2 H) 6.54 (d, J=5.77 Hz, 1 H) 6.66 (br. s., 1 H) 7.49 (t, J=7.40 Hz, 2 H) 7.54 - 7.60 (m, 2 H) 7.61 - 7.64 (m, 1 H) 7.78 - 7.85 (m, 2 H) 8.29 (d, J=2.01 Hz, 1 H)
Example 40
N-[((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl) methyl]-2,2-dimethylpropanamide
Figure imgf000127_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-{[(2,2- dimethylpropanoyl)amino]methyl}-1-pyrrolidinecarboxylate (119 mg, 0.2 mmol) in dioxane (5 ml.) was added a 4 M HCI solution in dioxane (4 ml_). The reaction mixture was stirred at room temperature for 1 hour then evaporated. The mixture was re-dissolved in DCM (10 ml_). To the resultant mixture, DIEA (0.42 ml_, 2.4 mmol) and a CNBr solution (0.6 ml_, 1.8 mmol) were added and stirred for 1 hour at room temperature. PS-trisamine (1 g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford the title compound (61 mg). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.19 (d, J=2.26 Hz, 1 H), 7.52 - 7.56 (m, 1 H), 7.49 (dd, J=8.28, 2.26 Hz, 1 H), 6.59 (d, J=5.77 Hz, 1 H), 6.01 (br. s., 1 H), 3.65 - 3.72 (m, 1 H), 3.65 - 3.72 (m, 1 H), 3.57 - 3.64 (m, 1 H), 3.45 - 3.51 (m, 1 H), 3.38 - 3.43 (m, 1 H), 3.28 - 3.35 (m, 1 H), 2.10 (ddd, J=13.74, 7.15, 6.96 Hz, 1 H), 1.65 (ddd, J=13.68, 5.14, 5.02 Hz, 1 H), 1.15 (s, 9 H)
Example 41
N-[((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-pyrrolidinyl)methyl]-2-phenylacetamide
Figure imgf000127_0002
Example 41 was prepared using the general procedure described above for Example 37, replacing 1 ,1-dimethylethyl (2S,4R)-4-{[(2,5-dibromo-3,6-difluorophenyl)sulfonyl]amino}-2- methyl-1-pyrrolidinecarboxylate (263 mg, 0.5 mmol) with 1 ,1-dimethylethyl (2R,4R)-4- {[(2,5-dibromophenyl)sulfonyl]amino}-2-{[(phenylacetyl)amino]methyl}-1- pyrrolidinecarboxylate (126 mg, 0.2 mmol) to afford the title compound (74 mg). LC-MS: 555 m/z, (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.59 (d, J=13.55 Hz, 1 H) 2.03 (d, J=6.53 Hz, 1 H) 3.22 (dd, J=10.16, 4.89 Hz, 1 H) 3.38 - 3.46 (m, 3 H) 3.55 - 3.63 (m, 3 H) 3.70 (d, J=5.77 Hz, 1 H) 5.77 (br. s., 1 H) 6.32 (d, J=6.02 Hz, 1 H) 7.24 (d, J=1.51 Hz, 2 H) 7.22 (s, 1 H) 7.27 (d, J=7.03 Hz, 1 H) 7.31 (d, J=7.28 Hz, 2 H) 7.47 - 7.51 (m, 1 H) 7.52 - 7.55 (m, 1 H) 8.18 (d, J=2.26 Hz, 1 H)
Example 42
N-[((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-pyrrolidinyl)methyl]-3-methylbenzamide
Figure imgf000128_0001
Example 42 was prepared using the general procedure described above for Example 37, replacing 1 ,1-dimethylethyl (2S,4R)-4-{[(2,5-dibromo-3,6-difluorophenyl)sulfonyl]amino}-2- methyl-1-pyrrolidinecarboxylate (263 mg, 0.5 mmol) with 1 ,1-dimethylethyl (2R,4R)-4- {[(2,5-dibromophenyl)sulfonyl]amino}-2-({[(3-methylphenyl)carbonyl]amino}methyl)-1- pyrrolidinecarboxylate (126 mg, 0.2 mmol) to afford the title compound (65 mg). LC-MS: 555 m/z, (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.89 (d, J=13.80 Hz, 1 H) 2.23 (s, 1 H) 2.26 (d, J=6.78 Hz, 1 H) 2.43 (s, 3 H) 3.50 - 3.55 (m, 1 H) 3.56 - 3.61 (m, 1 H) 3.67 (s, 1 H) 3.70 (dd, J=8.28, 1.76 Hz, 1 H) 3.83 - 3.90 (m, 1 H) 3.87 (dd, J=5.52, 4.27 Hz, 2 H) 6.59 (d, J=5.77 Hz, 1 H) 6.65 (s, 1 H) 7.33 - 7.40 (m, 2 H) 7.57 - 7.62 (m, 3 H) 7.64 (s, 1 H) 8.28 (d, J=2.01 Hz, 1 H)
Example 43
N-[((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}- 2-pyrrolidinyl)methyl]-2-(methyloxy)benzamide
Figure imgf000128_0002
Example 43 was prepared using the general procedure described above for Example 37, replacing 1 ,1-dimethylethyl (2S,4R)-4-{[(2,5-dibromo-3,6-difluorophenyl)sulfonyl]amino}-2- methyl-1-pyrrolidinecarboxylate (263 mg, 0.5 mmol) with 1 ,1-dimethylethyl (2R,4R)-4- {[(2,5-dibromophenyl)sulfonyl]amino}-2-[({[2-(methyloxy)phenyl]carbonyl}amino)methyl]-1- pyrrolidinecarboxylate (129 mg, 0.2 mmol) to afford the title compound (82 mg). LC-MS: 571 m/z, (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.63 (s, 1 H) 1.91 (d, J=13.80 Hz, 1 H) 2.22 (d, J=7.03 Hz, 1 H) 3.59 (d, J=5.02 Hz, 2 H) 3.80 (d, J=1.76 Hz, 1 H) 3.81 - 3.88 (m, 1 H) 3.84 (t, J=5.52 Hz, 2 H) 4.05 (s, 3 H) 6.80 (d, J=6.02 Hz, 1 H) 7.04 (d, J=8.53 Hz, 1 H) 7.11 (dd, J=15.06, 1.00 Hz, 1 H) 7.28 (s, 1 H) 7.52 (ddd, J=8.60, 7.59, 2.13 Hz, 1 H) 7.57 (d, J=6.53 Hz, 1 H) 7.60 (s, 1 H) 8.20 (dd, J=7.91 , 1.88 Hz, 1 H) 8.25 (d, J=2.26 Hz, 1 H) 8.39 (br. s., 1 H)
Example 44 N-[((2R,4R)-1 -Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}- 2-pyrrolidinyl)methyl]cyclohexanecarboxamide
Figure imgf000129_0001
Example 44 was prepared using the general procedure described above for Example 37, replacing 1 ,1-dimethylethyl (2S,4R)-4-{[(2,5-dibromo-3,6-difluorophenyl)sulfonyl]amino}-2- methyl-1-pyrrolidinecarboxylate (263 mg, 0.5 mmol) with 1 ,1-dimethylethyl (2R,4R)-2- {[(cyclohexylcarbonyOaminolmethyl^^^^-dibromophenyOsulfonyllaminoJ-i- pyrrolidinecarboxylate (125 mg, 0.2 mmol) to afford the title compound (81 mg). LC-MS: 547 m/z, (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.25 - 1.30 (m, 2 H) 1.32 (d, J=1.25 Hz, 1 H) 1.43 (br. s., 1 H) 1.46 (dd, J=9.29, 6.02 Hz, 2 H) 1.73 (d, J=9.03 Hz, 1 H) 1.78 - 1.85 (m, 3 H) 1.90 (br. s., 2 H) 2.18 (dd, J=13.05, 6.53 Hz, 1 H) 2.15 - 2.20 (m, 1 H) 3.43 - 3.50 (m, 2 H) 3.56 (d, J=6.02 Hz, 1 H) 3.58 (d, J=6.02 Hz, 1 H) 3.66 (t, J=6.78 Hz, 1 H) 3.71 - 3.77 (m, 1 H) 3.81 (d, J=5.52 Hz, 1 H) 5.88 (s, 1 H) 6.64 (d, J=5.77 Hz, 1 H) 7.57 - 7.60 (m, 1 H) 7.62 - 7.65 (m, 1 H) 8.28 (d, J=2.26 Hz, 1 H)
Example 45 N-[((2R,4R)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}- 2-pyrrolidinyl)methyl]-2-thiophenecarboxamide
Figure imgf000130_0001
Example 45 was prepared using the general procedure described above for Example 37, replacing 1 ,1-dimethylethyl (2S,4R)-4-{[(2,5-dibromo-3,6-difluorophenyl)sulfonyl]amino}-2- methyl-1-pyrrolidinecarboxylate (263 mg, 0.5 mmol) with 1 ,1-dimethylethyl (2R,4R)-4- {[(2,5-dibromophenyl)sulfonyl]amino}-2-{[(2-thienylcarbonyl)amino]methyl}-1- pyrrolidinecarboxylate (125 mg, 0.2 mmol) to afford the title compound (67 mg). LC-MS: 547 m/z, (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.89 (d, J=13.80 Hz, 1 H) 2.24 (d, J=7.03 Hz, 1 H) 3.57 (dd, J=9.79, 5.52 Hz, 2 H) 3.70 (d, J=6.53 Hz, 1 H) 3.81 - 3.88 (m, 3 H) 6.50 (d, J=5.77 Hz, 1 H) 6.61 (s, 1 H) 7.12 (dd, J=5.02, 3.76 Hz, 1 H) 7.54 - 7.60 (m, 3 H) 7.62 (s, 1 H) 7.64 (s, 1 H) 8.27 (d, J=2.26 Hz, 1 H)
Example 46
2,5-Dibromo-N-[(3R,5R)-1 -cyano-5-({[(phenylamino)carbonyl]amino}methyl)-3- pyrrolidinyljbenzenesulfonamide
Figure imgf000130_0002
To 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-1- pyrrolidinecarboxylate (70 mg, 0.14 mmol) in DCM (3 ml.) was added phenyl isocyanate (18 mg, 0.15 mmol). The reaction mixture was stirred at room temperature over the weekend then concentrarted under vacuum to afford the crude 1 ,1-dimethylethyl (2R,4R)- 4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-({[(phenylamino)carbonyl]amino}methyl)-1- pyrrolidinecarboxylate. Following the general procedure described above in Example 37, replacing 1 ,1-dimethylethyl (2S,4R)-4-{[(2,5-dibromo-3,6-difluorophenyl)sulfonyl]amino}-2- methyl-1-pyrrolidinecarboxylate (263 mg, 0.5 mmol) with the crude 1 , 1 -dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-
({[(phenylamino)carbonyl]amino}methyl)-1-pyrrolidinecarboxylate previously obtained to afford the title compound (-73 mg). LC-MS: 556 m/z, (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.92 (s, 1 H) 3.50 (d, J=AIl Hz, 1 H) 3.51 - 3.58 (m, 1 H) 3.54 (dd, J=6.15, 4.14 Hz, 2 H) 3.77 (dt, J=5.52, 2.76 Hz, 2 H) 5.62 (s, 1 H) 6.77 (d, J=6.27 Hz, 1 H) 7.12 (d, J=7.03 Hz, 1 H) 7.20 (s, 1 H) 7.28 (s, 2 H) 7.31 - 7.37 (m, 4 H) 7.53 - 7.61 (m, 2 H) 8.26 (d, J=2.01 Hz, 1 H)
Example 47
5-Chloro-N-[(3R,5S)-1 -cyano-5-methyl-3-pyrrolidinyl]- 2-(methyloxy)benzenesulfonamide
Figure imgf000131_0001
To 1 ,1 -dimethylethyl (2S,4R)-4-({[5-chloro-2-(methyloxy)phenyl]sulfonyl}amino)-2-methyl- 1-pyrrolidinecarboxylate (93.7 mg, 0.23 mmol) in DCM (20 ml.) was added 4N HCI in dioxane (3 ml_). The reaction mixture was stirred at room temperature for 3 hours and concentrated under vacuum to give a crude residue. To the crude material previously obtained in DCM (20 ml.) was added DIEA (0.2 ml.) then BrCN (0.16 ml.) was added after checking the pH was basic. The resultant mixture was stirred overnight at room temperature. PS trisamine (4 eq) was added and the mixture was stirred for an additional 2 hours at room temperature, filtered, treated with water and DCM then purified by preparatory HPLC (without TFA) to afford the title compound (29.8 mg). LC-MS: m/z, 331 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 7.89 (1 H, d, J=2.51 Hz) 7.55 (1 H, dd, J=8.91 , 2.64 Hz) 7.03 (1 H, d, J=8.78 Hz) 5.45 (1 H, d, J=7.78 Hz) 4.01 (3 H, s) 3.88 (1 H, ddd, J=14.93, 7.65, 7.53 Hz) 3.60 (1 H, dq, J=8.97, 6.38 Hz) 3.44 (1 H, dd, J=9.79, 7.28 Hz) 3.18 (1 H, dd, J=9.79, 7.03 Hz) 2.23 (1 H, dd, J=12.92, 6.40 Hz) 1.44 (1 H, dt, J=12.80, 9.03 Hz) 1.34 (3 H, d, J=6.27 Hz)
Example 48
N-[(3R,5S)-1-Cyano-5-methyl-3-pyrrolidinyl]-2,5-dimethylbenzenesulfonamide
Figure imgf000132_0001
To 1 ,1-dimethylethyl (2S,4R)-4-{[(2,5-dimethylphenyl)sulfonyl]amino}-2-methyl-1- pyrrolidinecarboxylate (1 10.7 mg, 0.30 mmol, 1 eq.) in DCM (20 ml.) was added slowly 4 N HCI in dioxane (3 ml_). The reaction mixture was stirred at room temperature for 3 hours and concentrated under vacuum to give a crude residue. To the crude material previously obtained in DCM (20 ml.) was added DIEA (0.21 ml_). Then BrCN (0.16 ml.) was added after checking that the pH was basic. The mixture was stirred overnight at room temperature then P-S trisamine (4 eq.) was added. After stirring for an additional 2 hours at room temperature, the mixture was filtered, extracted with water and DCM and purified on preparatory HPLC (without TFA) to afford the title compound (26.4 mg). LC- MS: m/z, 294 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 7.80 (1 H, s) 7.28 - 7.35 (1 H, m) 7.22 - 7.27 (1 H, m) 5.29 (1 H, d, J=6.02 Hz) 3.79 - 3.86 (1 H, m) 3.60 (1 H, dq, J=9.32, 6.26 Hz) 3.46 (1 H, dd, J=9.79, 7.53 Hz) 3.17 (1 H, dd, J=9.79, 7.53 Hz) 2.59 (3 H, s) 2.41 (3 H, s) 2.26 (1 H, ddd, J=12.67, 6.53, 6.40 Hz) 1.44 (1 H, dt, J=12.80, 9.29 Hz) 1.34 (3 H, d, J=6.02 Hz)
Example 49 N-[(3R,5S)-1-Cyano-5-methyl-3-pyrrolidinyl]-3-(trifluoromethyl)benzenesulfonamide
Figure imgf000132_0002
To 1 ,1-dimethylethyl (2S,4R)-2-methyl-4-({[3-(trifluoromethyl)phenyl]sulfonyl}amino)-1- pyrrolidinecarboxylate (104 mg, 0.25 mmol) in DCM (20 mL) was added slowly 4N HCI in dioxane (3 mL). The reaction mixture was stirred at room temperature for 3 hours and concentrated under vacuum to give a crude residue. To the crude material previously obtained in DCM (20 mL) was added DIEA (0.18 mL) then BrCN (0.17 mL) was added after checking that the pH was basic. The mixture was stirred overnight at room temperature then PS-trisamine (4 eq.) was added. After stirring for an additional 2 hours at room temperature, the mixture was filtered, extracted with water and DCM and purified on preparatory HPLC (without TFA) to afford the title compound (24.2 mg). LC-MS: m/z, 334 (M+H). 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.16 (1 H, s) 8.09 (1 H, d, J=8.03 Hz) 7.90 (1 H, d, J=7.78 Hz) 7.73 (1 H, t, J=7.91 Hz) 5.57 (1 H, d, J=7.78 Hz) 3.86 - 3.93 (1 H, m) 3.64 (1 H, dt, J=9.03, 6.40 Hz) 3.55 (1 H, dd, J=9.79, 7.28 Hz) 3.25 (1 H, dd, J=9.79, 7.03 Hz) 2.29 (1 H, dt, J=12.86, 6.49 Hz) 1.47 (1 H, dt, J=12.80, 8.91 Hz) 1.36 (3 H, d, J=6.27 Hz)
Example 50 2,5-Dibromo-N-[(3R,5S)-1 -cyano-5-methyl-3-pyrrolidinyl]- 4-fluorobenzenesulfonamide
Figure imgf000133_0001
To a solution of 2,5-dibromo-4-fluoro-N-[(3R,5S)-5-methyl-3- pyrrolidinyl]benzenesulfonamide (0.625 mmol, 1 eq.) and triethylamine (210 μL, 1.87 mmol) in DCM (5 mL) was added BrCN (416 μL, 1.25 mmol, 2 eq.). The reaction mixture was stirred for 50 hours at room temperature. PS-trisamine resin (1.36 g, 2.5 mmol, 4 eq.) was added and the resulting mixture was stirred for one hour at room temperature, then filtered and evaporated to give crude material that was purified by preparatory HPLC to afford the title compound (45 mg). LC-MS: m/z, 441.9 (M+H). 1 H NMR (400 MHz,
CHLOROFORM-d) δ ppm 8.38 (1 H, d, J=7.03 Hz) 7.56 (1 H, d, J=7.28 Hz) 5.45 (1 H, d,
J=7.78 Hz) 3.89 (1 H, dd, J=15.94, 7.91 Hz) 3.59 - 3.69 (1 H, m, J=6.27, 3.51 , 3.14, 3.14
Hz) 3.54 (1 H, dd, J=9.79, 7.28 Hz) 3.29 (1 H, dd, J=10.04, 7.03 Hz) 2.30 (1 H, dt,
J=12.86, 6.49 Hz) 1.50 (1 H, dt, J=12.80, 9.03 Hz) 1.39 (3 H, d, J=6.27 Hz) Example 51 Λ/-[((2R,4R)-1 -Cyano-4-{[(2,5-dichlorophenyl)sulfonyl] amino}-2-pyrrolidinyl)methyl]benzamide
Figure imgf000134_0001
To 1 , 1 -dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5-dichlorophenyl)sulfonyl] amino}-1- pyrrolidinecarboxylate (100 mg, 0.24 mmol) in DCM (3 ml.) was added TEA (48 mg, 0.48 mmol) and benzoyl chloride (36 mg, 0.25 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N HCI and the DCM layer was isolated and evaporated to give a crude oil that was treated with 4 N HCI in dioxane. The reaction mixture was stirred at room temperature for 1 hour and the solvent was evaporated. The mixture was re-dissolved in DCM (10 ml_). To the resultant solution, DIEA (0.26 ml_, 0.96 mmol) and CNBr solution (0.24 ml_, 0.72 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (1 g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford the title compound. (91 mg, 83%). LC-MS: m/z, 455 (M+H), rt 1.90 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.89 (d, J=13.80 Hz, 1 H) 2.22 (d, J=6.78 Hz, 1 H) 3.56 (t, J=5.90 Hz, 2 H) 3.66 (s, 1 H) 3.67 (d, J=6.27 Hz, 1 H) 3.87 (br. s., 1 H) 3.85 (d, J=6.27 Hz, 2 H) 3.88 (d, J=1.76 Hz, 1 H) 6.88 (s, 1 H) 7.43 - 7.48 (m, 2 H) 7.50 - 7.57 (m, 3 H) 7.81 (d, J=7.03 Hz, 1 H) 7.80 (s, 1 H) 8.10 (d, J=2.26 Hz, 1 H)
Example 52 Λ/-[((2R,4R)-1 -Cyano-4-{[(2,5- dichlorophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl]-3- methylbenzamide
Figure imgf000134_0002
To 1 ,1 -dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5-dichlorophenyl)sulfonyl] amino}-1- pyrrolidinecarboxylate (100 mg, 0.24 mmol) in DCM (3 mL) was added TEA (48 mg, 0.48 mmol) and 3-methylbenzoyl chloride (39 mg, 0.25 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N HCI and the DCM layer was isolated and evaporated to give a crude oil that was treated with 4 N HCI in dioxane. The reaction mixture was stirred at room temperature for 1 hour after which the solvent was evaporated. The mixture was re-dissolved in DCM (10 ml_). To the resultant mixture, DIEA (0.26 ml_, 0.96 mmol) and CNBr solution (0.24 ml_, 0.72 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (1 g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford the title compound. (47 mg, 42%). LC-MS: m/z, 469 (M+H), rt 2.01 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.66 (d, J=13.55 Hz, 1 H) 2.00 (d, J=6.78 Hz, 1 H) 2.21 (s, 3 H) 3.35 (dd, J=11.92, 5.14 Hz, 1 H) 3.45 (dd, J=8.53, 6.53 Hz, 1 H) 3.62 - 3.69 (m, 3 H) 6.40 (br. s., 1 H) 6.46 (d, J=5.77 Hz, 1 H) 7.09 - 7.17 (m, 2 H) 7.25 - 7.32 (m, 2 H) 7.36 (dd, J=4.89, 3.14 Hz, 1 H) 7.41 (s, 1 H) 7.88 (d, J=2.26 Hz, 1 H)
Example 53 Λ/-[((2/?,4/?)-1 -Cyano-4-{[(2,5-dichlorophenyl)sulfonyl] amino}-2-pyrrolidinyl)methyl]-2,2-dimethylpropanamide
Figure imgf000135_0001
To 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5-dichlorophenyl)sulfonyl] amino}-1- pyrrolidinecarboxylate (100 mg, 0.24 mmol) in DCM (3 mL) was added TEA (48 mg,
0.48 mmol) and trimethylacetyl chloride (31 mg, 0.25 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N
HCI and the DCM layer was isolated and evaporated to give a crude oil that was treated with 4 N HCI in dioxane. The reaction mixture was stirred at room temperature for 1 hour and the solvent evaporated. The mixture was re-dissolved in DCM (10 mL). To the resultant mixture, DIEA (0.26 mL, 0.96 mmol) and CNBr solution (0.24 mL, 0.72 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (1 g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford the title compound. (46 mg, 44%). LC-MS: m/z, 435 (M+H), rt 1.92 min. 1 H NMR
(400 MHz, CHLOROFORM-d) δ ppm 1.15 (s, 10 H) 1.65 (d, J=13.55 Hz, 1 H) 2.07 (d, J=6.78 Hz, 1 H) 2.10 (s, 1 H) 3.28 - 3.35 (m, 1 H) 3.44 (d, J=4.02 Hz, 1 H) 3.46 - 3.51 (m, 1 H) 3.61 (d, J=7.03 Hz, 1 H) 3.64 - 3.69 (m, 1 H) 3.65 (t, J=6.40 Hz, 1 H) 3.72 (d, J=5.77 Hz, 1 H) 6.03 (br. s., 1 H) 6.73 (d, J=5.77 Hz, 1 H) 7.39 - 7.46 (m, 2 H) 8.02 (d, J=2.26 Hz, 1 H)
Example 54 Λ/-[((2/?,4/?)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl] amino}-2-pyrrolidinyl)methyl]-3-fluorobenzamide
Figure imgf000136_0001
To 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5-dibromophenyl)sulfonyl] amino}-1- pyrrolidinecarboxylate (100 mg, 0.24 mmol) in DCM (3 ml.) was added TEA (40 mg, 0.4 mmol) and 3-fluorobenzoyl chloride (32 mg, 0.20 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N HCI and the DCM layer was isolated and evaporated to to give a crude oil that was treated with 4 N HCI in dioxane. The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (10 ml_). To the resultant mixture, DIEA (0.16 ml_, 0.80 mmol) and CNBr solution (0.20 ml_, 0.60 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (1 g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford the title compound. (61 mg, 57%). LC-MS: m/z, 561 (M+H), rt 2.00 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.87 (dt, J=13.55, 5.52 Hz, 1 H) 2.26 (dt, J=13.87, 7.00 Hz, 1 H) 3.50 - 3.55 (m, 1 H) 3.56 - 3.62 (m, 1 H) 3.68 (dd, J=8.03, 6.27 Hz, 1 H) 3.82 - 3.89 (m, 1 H) 3.86 (dd, J=13.30, 6.02 Hz, 2 H) 6.56 (d, J=5.77 Hz, 1 H) 6.88 (t, J=5.90 Hz, 1 H) 7.44 (td, J=8.03, 5.52 Hz, 1 H) 7.55 - 7.60 (m, 2 H) 7.62 (s, 1 H) 7.64 (s, 1 H) 8.28 (d, J=2.26 Hz, 1 H) Example 55 Λ/-[((2/?,4/?)-1-Cyano-4-{[(2,5-dibromophenyl)sulfonyl] amino}-2-pyrrolidinyl)methyl]-4-fluorobenzamide
Figure imgf000137_0001
To 1 , 1 -dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5-dibromophenyl)sulfonyl] amino}-1- pyrrolidinecarboxylate (100 mg, 0.24 mmol) in DCM (3 ml.) was added TEA (40 mg, 0.4 mmol) and 4-fluorobenzoyl chloride (32 mg, 0.20 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N HCI and the DCM layer was isolated and evaporated to to give a crude oil that was treated with 4 N HCI in dioxane. The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (10 ml_). To the resultant mixture, DIEA (0.16 ml_, 0.80 mmol) and CNBr solution (0.20 ml_, 0.60 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (1 g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford the title compound. (-70 mg, 66%). LC-MS: m/z, 561 (M+H), rt 1.99 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.88 (d, J=13.55 Hz, 1 H) 2.25 (d, J=6.78 Hz, 1 H) 3.51 - 3.55 (m, 1 H) 3.56 - 3.61 (m, 1 H) 3.67 (dd, J=8.03, 6.27 Hz, 1 H) 3.83 - 3.90 (m, 3 H) 6.60 (br. s., 1 H) 6.75 - 6.82 (m, 1 H) 7.10 - 7.17 (m, 2 H) 7.61 (q, J=8.45 Hz, 1 H) 7.57 - 7.65 (m, 1 H) 7.83 (dd, J=8.78, 5.27 Hz, 2 H) 7.80 - 7.87 (m, 1 H) 8.28 (d, J=2.26 Hz, 1 H)
Example 56 2,5-Dibromo-Λ/-{(3/?,5/?)-1 -cyano-5-[({[2-(methyloxy)phenyl) amino]carbonyl}amino)methyl]-3-pyrrolidinyl}benzene sulfonamide
Figure imgf000137_0002
To 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-1- pyrrolidinecarboxylate (100 mg, 0.19 mmol) in DCM (3 ml.) was added 1-isocyanato-2- (methyloxy)benzene (30 mg, 0.20 mmol).3-fluorophenyl isocyanate (30 mg, 0.20 mmol). The reaction mixture was stirred at room temperature over the weekend then concentrated under vacuum to afford the crude, which was treated with 4N HCI in dioxane. The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (10 ml_). To the resultant mixture, DIEA (0.16 ml_, 0.80 mmol) and CNBr solution (0.20 ml_, 0.60 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (1 g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford the title compound. (74 mg, 66%). LC-MS: m/z, 588 (M+H), rt 2.02 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.80 - 1.88 (m, 1 H) 2.10 - 2.18 (m, 1 H) 3.40 (dd, J=10.04, 5.52 Hz, 1 H) 3.47 - 3.54 (m, 3 H) 3.72 - 3.79 (m, 1 H) 3.78 (s, 4 H) 5.85 (br. s., 1 H) 6.61 (dd, J=8.16, 1.88 Hz, 1 H) 6.84 (dd, J=8.03, 1.25 Hz, 1 H) 7.06 (t, J=2.26 Hz, 1 H) 7.18 (t, J=8.16 Hz, 1 H) 7.49 (s, 1 H) 7.52 - 7.59 (m, 2 H) 8.25 (d, J=2.01 Hz, 1 H)
Example 57 2,5-Dibromo-Λ/-{(3/?,5/?)-1 -cyano-5-[({[3-(methyloxy)phenyl) amino]carbonyl}amino)methyl]-3-pyrrolidinyl}benzene sulfonamide
Figure imgf000138_0001
2,5-Dibromo-Λ/-{(3R,5R)-1-cyano-5-[({[3-(methyloxy)phenyl) amino]carbonyl}amino)methyl]-3-pyrrolidinyl}benzene sulfonamide (82 mg, 73%) was prepared according to the general procedure of Example 56, substituting 1-isocyanato-3- (methyloxy)benzene (30 mg, 0.20 mmol) for 1-isocyanato-2-(methyloxy)benzene (30 mg, 0.20 mmol). LC-MS: 588 m/z, (M+H), rt 1.94 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.83 (t, J=12.92 Hz, 1 H) 2.10 - 2.17 (m, 1 H) 3.38 - 3.42 (m, 1 H) 3.44 - 3.51 (m, 1 H) 3.47 (dd, J=9.66, 3.64 Hz, 2 H) 3.69 (d, J=6.78 Hz, 1 H) 3.76 (s, 4 H) 5.72 (br. s., 1 H) 6.81 (m, 2 H) 7.21 (m, 2 H) 7.30 (d, J=13.30 Hz, 1 H) 7.51 - 7.59 (m, 2 H) 8.23 (d, J=2.01 Hz, 1 H) Example 58 2,5-Dibromo-Λ/-{(3/?,5/?)-1 -cyano-5-[({[4-(methyloxy)phenyl) amino]carbonyl}amino)methyl]-3-pyrrolidinyl}benzene sulfonamide
Figure imgf000139_0001
2,5-Dibromo-Λ/-{(3R,5R)-1-cyano-5-[({[4-(methyloxy)phenyl) amino]carbonyl}amino)methyl]-3-pyrrolidinyl}benzene sulfonamide (112 mg, 100%) was prepared according to the general procedure of Example 56, substituting 1-isocyanato-4- (methyloxy)benzene (30 mg, 0.20 mmol) for 1-isocyanato-2-(methyloxy)benzene (30 mg, 0.20 mmol). LC-MS: 588 m/z, (M+H), rt 2.04 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.85 (dt, J=13.49, 6.68 Hz, 1 H) 2.19 (ddd, J=13.80, 7.28, 7.03 Hz, 1 H) 3.43 (dd, J=10.04, 5.52 Hz, 1 H) 3.50 - 3.56 (m, 3 H) 3.76 (t, J=6.15 Hz, 1 H) 3.82 (t, J=6.27 Hz, 1 H) 6.1 1 (br. s., 1 H) 7.08 (br. s., 1 H) 7.21 (t, J=7.65 Hz, 1 H) 7.52 - 7.57 (m, 2 H) 7.58 - 7.61 (m, 2 H) 7.91 (d, J=8.28 Hz, 1 H) 8.25 (d, J=2.01 Hz, 1 H)
Example 59 2,5-Dibromo-Λ/-((3R,5/?)-1 -cyano-5-{[({[2-(trifluoromethyl) phenyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl)benzene sulfonamide
Figure imgf000139_0002
2,5-Dibromo-N-((3R,5R)-1-cyano-5-{[({[2-(trifluoromethyl) phenyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl)benzene sulfonamide (112 mg, 93%) was prepared according to the general procedure of Example 56, substituting 1- isocyanato-2-(trifluoromethyl)benzene (37 mg, 0.20 mmol) for 1-isocyanato-2- (methyloxy)benzene (30 mg, 0.20 mmol). LC-MS: 626 m/z, (M+H), rt 2.19 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.87 (d, J=7.03 Hz, 1 H) 1.90 (s, 1 H) 2.19 (d, J=7.03 Hz, 1 H) 3.53 - 3.59 (m, 1 H) 3.56 (dd, J=9.41 , 5.65 Hz, 3 H) 3.80 (t, J=12.55 Hz, 1 H) 3.80 (d, J=11.80 Hz, 1 H) 5.91 (br. s., 1 H) 7.22 - 7.27 (m, 1 H) 7.33 (t, J=7.91 Hz, 1 H) 7.45 (d, J=8.28 Hz, 1 H) 7.54 - 7.61 (m, 1 H) 7.57 (d, J=3.01 Hz, 1 H) 7.68 (d, J=13.05 Hz, 2 H) 8.25 (d, J=2.01 Hz, 1 H)
Example 60 2,5-Dibromo-Λ/-((3/?,5/?)-1 -cyano-5-{[({[3-(trifluoromethyl) phenyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl)benzene sulfonamide
Figure imgf000140_0001
2,5-Dibromo-Λ/-((3R,5R)-1-cyano-5-{[({[3-(trifluoromethyl) phenyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl)benzene sulfonamide (104 mg, 87%) was prepared according to the general procedure of Example 56, substituting 1- isocyanato-3-(trifluoromethyl)benzene (37 mg, 0.20 mmol) for 1-isocyanato-2- (methyloxy)benzene (30 mg, 0.20 mmol). LC-MS: 626 m/z, (M+H), rt 2.30 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.88 (d, J=13.80 Hz, 1 H) 2.20 (d, J=7.03 Hz, 1 H) 3.58 (dt, J=10.85, 5.49 Hz, 3 H) 3.81 (td, J=1 1.04, 6.02 Hz, 2 H) 5.98 (br. s., 1 H) 7.41 - 7.49 (m, 4 H) 7.54 - 7.61 (m, 2 H) 7.72 (s, 1 H) 8.25 (d, J= 1.26 Hz, 1 H)
Example 61 2,5-Dibromo-Λ/-((3/?,5/?)-1 -cyano-5-{[({4-(trifluoromethyl) phenyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl)benzene sulfonamide
Figure imgf000140_0002
2,5-Dibromo-Λ/-((3R,5R)-1-cyano-5-{[({4-(trifluoromethyl) phenyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl)benzene sulfonamide (11 1 mg, 93%) was prepared according to the general procedure of Example 56, substituting 1- isocyanato-4-(trifluoromethyl)benzene (37 mg, 0.20 mmol) for 1-isocyanato-2- (methyloxy)benzene (30 mg, 0.20 mmol). LC-MS: 626 m/z, (M+H), rt 2.32 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.88 (d, J=13.55 Hz, 1 H) 2.14 (s, 1 H) 2.17 (d, J=6.53 Hz, 1 H) 3.38 (dd, J=10.04, 5.02 Hz, 1 H) 3.50 (dd, J=10.04, 6.27 Hz, 1 H) 3.56 - 3.62 (m, 1 H) 3.59 (dd, J=5.14, 3.14 Hz, 1 H) 3.72 (d, J=6.27 Hz, 1 H) 3.79 (d, J=5.77 Hz, 1 H) 3.89 (s, 3 H) 5.48 (t, J=6.27 Hz, 1 H) 6.92 (dd, J=8.03, 1.51 Hz, 1 H) 6.94 - 7.00 (m, 1 H) 7.05 (dd, J=7.91 , 1.63 Hz, 1 H) 7.20 (s, 1 H) 7.53 - 7.60 (m, 2 H) 7.99 (dd, J=7.91 , 1.63 Hz, 1 H) 8.26 (d, J=2.26 Hz, 1 H)
Example 62 2,5-Dibromo-Λ/-{(3/?,5/?)-1-cyano-5-[({[(3-fluorophenyl) amino]carbonyl}amino)methyl]-3-pyrrolidinyl}benzene sulfonamide
Figure imgf000141_0001
2,5-Dibromo-Λ/-{(3R,5/?)-1-cyano-5-[({[(3-fluorophenyl) amino]carbonyl}amino)methyl]-3- pyrrolidinyl}benzene sulfonamide (97 mg, 89%) was prepared according to the general procedure of Example 56, substituting with 3-fluorophenyl isocyanate (28 mg, 0.20 mmol) for 1-isocyanato-2-(methyloxy)benzene 3 (30 mg, 0.20 mmol). LC-MS: m/z, 576 (M+H), rt 2.06 min 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.88 (t, J=6.53 Hz, 1 H) 2.18 (t, J=14.18 Hz, 1 H) 3.55 (d, J=17.82 Hz, 1 H) 3.53 (dd, J=16.19, 5.65 Hz, 2 H) 3.78 (qd, J=6.07, 5.90 Hz, 2 H) 5.89 (t, J=5.65 Hz, 1 H) 6.72 (td, J=8.28, 1.76 Hz, 1 H) 6.97 (dd, J=8.28, 1.25 Hz, 1 H) 7.19 (td, J=8.16, 6.53 Hz, 1 H) 7.24 - 7.31 (m, 2 H) 7.54 - 7.61 (m, 3 H) 8.25 (d, J=2.26 Hz, 1 H)
Example 63 2,5-Dibromo-Λ/-{(3/?,5/?)-1 -cyano-5-[({[(2-methylphenyl)amino] carbonyl}amino)methyl]-3-pyrrolidinyl}benzenesulfonamide
Figure imgf000142_0001
2,5-Dibromo-Λ/-{(3R,5R)-1-cyano-5-[({[(2-methylphenyl)amino] carbonyl}amino)methyl]-3- pyrrolidinyl}benzenesulfonamide (84 mg, 77%) was prepared according to the general procedure of Example 56, substituting 1-isocyanato-2-methylbenzene (27 mg, 0.20 mmol) for 1-isocyanato-2-(methyloxy)benzene. LC-MS: m/z, 572 (M+H), rt 2.00 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.72 (dt, J=13.74, 5.55 Hz, 1 H) 1.94 - 2.00 (m, 1 H) 2.05 (s, 3 H) 3.20 - 3.25 (m, 1 H) 3.29 (dd, J=10.04, 6.02 Hz, 3 H) 3.50 (dd, J=7.65, 5.65 Hz, 1 H) 3.59 (t, J=5.90 Hz, 1 H) 5.25 (br. s., 1 H) 6.48 (s, 1 H) 6.88 - 6.94 (m, 1 H) 6.95 - 7.03 (m, 2 H) 7.28 - 7.34 (m, 2 H) 7.36 (s, 1 H) 7.38 (s, 1 H) 8.03 (d, J=2.26 Hz, 1 H)
Example 64 2,5-Dibromo-Λ/-{(3/?,5/?)-1 -cyano-5-[({[(3-methylphenyl)amino] carbonyl}amino)methyl]-3-pyrrolidinyl}benzenesulfonamide
Figure imgf000142_0002
2,5-Dibromo-Λ/-{(3R,5R)-1-cyano-5-[({[(3-methylphenyl)amino] carbonyl}amino)methyl]-3- pyrrolidinyl}benzenesulfonamide (93 mg, 86%) was prepared according to the general procedure of Example 56, substituting i-isocyanato-3-methylbenzene (27 mg, 0.20 mmol) for 1-isocyanato-2-(methyloxy)benzene. LC-MS: m/z, 572 (M+H), rt 2.08 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.90 (t, J=6.02 Hz, 1 H) 2.13 - 2.18 (m, 1 H) 2.32 (s, 3 H) 3.44 - 3.48 (m, 1 H) 3.50 - 3.55 (m, 3 H) 3.75 (dt, J=13.55, 6.78 Hz, 2 H) 5.73 (br. s., 1 H) 6.90 (d, J=7.28 Hz, 1 H) 7.10 - 7.14 (m, 1 H) 7.15 - 7.21 (m, 2 H) 7.53 - 7.60 (m, 2 H) 8.25 (d, J=2.01 Hz, 1 H)
Example 65 2,5-Dibromo-Λ/-{(3/?,5/?)-1 -cyano-5-[({[(phenylmethyl)amino] carbonyl}amino)methyl]-3-pyrrolidinyl}benzenesulfonamide
Figure imgf000143_0001
2,5-Dibromo-Λ/-{(3R,5R)-1-cyano-5-[({[(phenylmethyl)amino] carbonyl}amino)methyl]-3- pyrrolidinyl}benzenesulfonamide (75 mg, 69%) was prepared according to the general procedure of Example 56, substituting (isocyanatomethyl)benzene (27 mg, 0.20 mmol) for 1-isocyanato-2-(methyloxy)benzene (30 mg, 0.20 mmol). LC-MS: m/z, 572 (M+H), rt 1.94 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.84 (ddd, J=13.68, 5.65, 5.52 Hz, 1 H) 2.09 - 2.14 (m, 1 H) 3.41 (d, J=4.52 Hz, 1 H) 3.43 - 3.49 (m, 3 H) 3.66 (t, J=5.52 Hz, 1 H) 3.65 (q, J=5.52 Hz, 1 H) 3.75 (t, J=5.77 Hz, 1 H) 4.29 (d, J=5.77 Hz, 1 H) 4.34 (dd, J=12.55, 5.77 Hz, 2 H) 4.40 (d, J=6.02 Hz, 1 H) 5.32 (t, J=6.15 Hz, 1 H) 5.40 (t, J=5.77 Hz, 1 H) 6.90 (br. s., 1 H) 7.27 - 7.30 (m, 4 H) 7.31 - 7.35 (m, 2 H) 7.54 - 7.62 (m, 2 H) 8.26 (d, J=2.26 Hz, 1 H)
Example 66 2,5-Dibromo-Λ/-[(3/?,5/?)-1 -cyano-5-({[({[2-(methyloxy)phenyl] methyl}amino)carbonyl]amino}methyl)-3-pyrrolidinyl]benzene sulfonamide
Figure imgf000143_0002
2,5-Dibromo-Λ/-[(3R,5R)-1-cyano-5-({[({[2-(methyloxy)phenyl] methyl}amino)carbonyl]amino}methyl)-3-pyrrolidinyl]benzene sulfonamide (78 mg, 68%) was prepared according to the general procedure of Example 56, by substituting 1- (isocyanatomethyl)-2-(methyloxy)benzene (33 mg, 0.20 mmol).for 1-isocyanato-2- (methyloxy)benzene. LC-MS: m/z, 602 (M+H), rt 1.98 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.84 (t, J=6.02 Hz, 1 H) 2.08 (s, 1 H) 2.10 (d, J=6.53 Hz, 1 H) 3.40 (d, J=5.02 Hz, 1 H) 3.47 (d, J=8.03 Hz, 1 H) 3.45 (dd, J=8.41 , 6.15 Hz, 2 H) 3.63 (d, J=6.78 Hz, 1 H) 3.75 (t, J=5.90 Hz, 1 H) 3.84 (s, 3 H) 4.33 (dd, J=10.42, 5.90 Hz, 2 H) 5.38 (t, J=6.27 Hz, 1 H) 5.49 (t, J=6.15 Hz, 1 H) 6.88 (d, J=8.03 Hz, 1 H) 6.93 (t, J=7.53 Hz, 1 H) 7.09 (br. s., 1 H) 7.25 (d, J=7.53 Hz, 2 H) 7.28 (s, 1 H) 7.53 - 7.57 (m, 1 H) 7.58 7.61 (m, 1 H) 8.25 (d, J=2.26 Hz, 1 H)
Example 67 2,5-Dibromo-Λ/-[(3/?,5/?)-1 -cyano-5-({[({[3-(methyloxy)phenyl] methyl}amino)carbonyl]amino}methyl)-3-pyrrolidinyl]benzene sulfonamide
Figure imgf000144_0001
2,5-Dibromo-Λ/-[(3R,5R)-1-cyano-5-({[({[3-(methyloxy)phenyl] methyl}amino)carbonyl]amino}methyl)-3-pyrrolidinyl]benzene sulfonamide (89 mg, 78%) was prepared according to the general procedure of Example 56 by substituting 1- (isocyanatomethyl)-3-(methyloxy)benzene (33 mg, 0.20 mmol) for 1-isocyanato-2- (methyloxy)benzene. LC-MS: m/z, 602 (M+H), rt 1.94 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.79 (s, 1 H) 1.81 (d, J=6.53 Hz, 1 H) 2.07 (s, 1 H) 2.10 (d, J=6.53 Hz, 1 H) 3.33 (dd, J=10.04, 5.27 Hz, 1 H) 3.41 (t, J=5.65 Hz, 1 H) 3.48 (dd, J=9.91 , 6.40 Hz, 2 H) 3.63 (d, J=6.02 Hz, 1 H) 3.75 (t, J=6.15 Hz, 1 H) 3.81 (s, 3 H) 4.31 (d, J=5.77 Hz, 2 H) 5.42 (br. s., 1 H) 5.51 (t, J=5.90 Hz, 1 H) 6.79 (d, J=2.51 Hz, 1 H) 6.81 - 6.87 (m, 2 H) 7.24 (t, J=7.91 Hz, 1 H) 7.58 (q, J=8.45 Hz, 2 H) 7.54 - 7.61 (m, 1 H) 8.25 (d, J=2.26 Hz, 1 H)
Example 68 2,5-Dibromo-Λ/-[(3R,5/?)-1 -cyano-5-({[({[4-(methyloxy)phenyl] methyl}amino)carbonyl]amino}methyl)-3-pyrrolidinyl]benzene sulfonamide
Figure imgf000144_0002
2,5-Dibromo-Λ/-[(3R,5R)-1-cyano-5-({[({[4-(methyloxy)phenyl] methyl}amino)carbonyl]amino}methyl)-3-pyrrolidinyl]benzene sulfonamide (86 mg, 75%) was prepared according to the general procedure of Example 56 by substituting 1- (isocyanatomethyl)-4-(methyloxy)benzene (33 mg, 0.20 mmol) for 1-isocyanato-2- (methyloxy)benzene. LC-MS: m/z, 602 (M+H), rt 1.93 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.86 (d, J=13.80 Hz, 1 H) 2.14 (d, J=7.28 Hz, 1 H) 3.43 (d, J=4.52 Hz, 1 H) 3.45 - 3.53 (m, 1 H) 3.49 (d, J=5.77 Hz, 2 H) 3.68 (dd, J=7.91 , 5.40 Hz, 1 H) 3.81 (s, 4 H) 4.31 (s, 1 H) 4.28 (d, J=6.27 Hz, 1 H) 5.12 (s, 1 H) 5.18 (t, J=5.65 Hz, 1 H) 6.88 (d, J=8.78 Hz, 2 H) 6.82 - 6.90 (m, 1 H) 7.23 (d, J=8.78 Hz, 2 H) 7.55 - 7.59 (m, 1 H) 7.60 - 7.63 (m, 1 H) 8.27 (d, J=2.26 Hz, 1 H)
Example 69 2,5-Dibromo-Λ/-[(3/?,5/?)-1-cyano-5-({[(cyclohexylamino) carbonyl]amino}methyl)-3-pyrrolidinyl]benzenesulfonamide
Figure imgf000145_0001
2,5-dibromo-Λ/-[(3R,5R)-1-cyano-5-({[(cyclohexylamino) carbonyl]amino}methyl)-3- pyrrolidinyl]benzenesulfonamide (83 mg, 77%) was prepared according to the general procedure of Example 56, substituting isocyanatocyclohexane (25 mg, 0.20 mmol) for 1- isocyanato-2-(methyloxy)benzene. LC-MS: m/z, 564 (M+H), rt 1.98 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.12 - 1.19 (m, 3 H) 1.36 (d, J=12.30 Hz, 2 H) 1.71 (d, J=5.52 Hz, 2 H) 1.74 (br. s., 1 H) 1.94 (dt, J=13.55, 4.77 Hz, 3 H) 2.16 - 2.22 (m, 1 H) 3.47 - 3.55 (m, 5 H) 3.74 (dd, J=8.16, 5.14 Hz, 1 H) 3.80 (d, J=5.52 Hz, 1 H) 4.76 (d, J=8.03 Hz, 1 H) 5.07 (t, J=6.53 Hz, 1 H) 7.13 (br. s., 1 H) 7.55 - 7.59 (m, 1 H) 7.60 - 7.64 (m, 1 H) 8.27 (d, J=2.51 Hz, 1 H)
Example 70 2,5-Dibromo-Λ/-[(3/?,5/?)-1 -cyano-5-({[4-(methyloxy)phenyl]oxy} methyl)-3-pyrrolidinyl]benzenesulfonamide
Figure imgf000146_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-4-amino-2-({[4-(methyloxy)phenyl]oxy} methyl)- 1-pyrrolidinecarboxylate (140 mg, 0.434 mmol) (0.356 g, 1.1 mmol) in DCM (8 ml) was added DIEA (0.152 ml, 0.868 mmol) followed by 2,5-dibromobenzenesulfonyl chloride (145 mg, 0.434 mmol) at room temperature with stirring. The reaction mixture was kept stirring under argon for 2h at room temperature then diluted with DCM and washed with 1 N HCI and saturated NaHCO3. The DCM layer was dried (Na2SO4) and evaporated to give the crude as a pale yellow oil, which was mixed with 4 N HCI in dioxane (4 ml.) for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (10 ml.) then DIEA (4 eq) and a CNBr solution (1.5 eq) were added and the resultant mixture was stirred for an additional 1 hour at room temperature. A PS-trisamine resin (0.5 g, 3.41 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered and the filtrate was concentrated and purified by preparatory HPLC (without TFA) to afford 2,5-dibromo-Λ/-[(3R,5R)-1-cyano-5-({[4-(methyloxy)phenyl]oxy} methyl)-3- pyrrolidinyl]benzenesulfonamide (156 mg, 66%). LC-MS: m/z, 546 (M+H), rt 2.14 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.93 (d, J=14.05 Hz, 1 H) 2.32 (ddd, J=14.18, 10.04, 7.15 Hz, 1 H) 3.20 (ddd, J=10.16, 1.88, 1.76 Hz, 1 H) 3.33 (dd, J=10.04, 5.02 Hz, 1 H) 3.76 - 3.97 (m, 4 H) 4.15 (dd, J=10.54, 2.26 Hz, 1 H) 6.69 - 6.81 (m, 4 H) 6.81 - 6.93 (m, 3 H) 7.44 (q, J=8.28 Hz, 2 H) 8.15 (d, J=2.26 Hz, 1 H)
Example 71 2,5-Dichloro-Λ/-[(3R,5/?)-1 -cyano-5-({[4-(methyloxy)phenyl]oxy} methyl)-3-pyrrolidinyl]benzenesulfonamide
Figure imgf000147_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-4-amino-2-({[4-(methyloxy)phenyl]oxy} methyl)- 1-pyrrolidinecarboxylate (140 mg, 0.434 mmol) (0.356 g, 1.1 mmol) in DCM (8 ml) was added DIEA (0.152 ml, 0.868 mmol) followed by 2,5-dichlorobenzenesulfonyl chloride (106 mg, 0.434 mmol) at room temperature with stirring. The reaction mixture was kept stirring under argon for 2h at room temperature then diluted with DCM and washed with 1 N HCI and saturated NaHCO3. The DCM layer was dried (Na2SO4) and evaporated to give the crude as a pale yellow oil, which was mixed with 4 N HCI in dioxane (4 ml.) for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (10 ml_). To the resultant mixture, DIEA (4 eq) and CNBr solution (1.5 eq) were added and stirred for an additional 1 hour at room temperature. A PS-trisamine resin (0.5 g, 3.41 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered and the filtrate was concentrated and purified by preparatory HPLC (without TFA) to afford the 2,5-dichloro-Λ/-[(3R,5R)-1-cyano-5-({[4-(methyloxy)phenyl]oxy} methyl)-3- pyrrolidinyl]benzenesulfonamide. (110 mg, 56%). LC-MS: m/z, 458 (M+H), rt 2.08 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 2.03 (s, 1 H) 2.06 (d, J=14.05 Hz, 1 H) 2.47 (td, J=7.03, 3.01 Hz, 1 H) 3.31 - 3.38 (m, 1 H) 3.49 (dd, J=10.04, 5.02 Hz, 1 H) 3.81 (s, 3 H) 3.96 (d, J=2.26 Hz, 1 H) 3.98 (d, J=2.51 Hz, 1 H) 4.01 (d, J=3.01 Hz, 1 H) 4.03 - 4.09 (m, 1 H) 4.29 (dd, J=10.54, 2.26 Hz, 1 H) 6.85 (d, J=9.29 Hz, 1 H) 6.90 (m, 2 H) 6.99 (m, 2 H) 7.49 (q, J=8.53 Hz, 1 H) 7.46 - 7.53 (m, 1 H) 8.12 (d, J=2.51 Hz, 1 H)
Example 72 2,5-Dibromo-Λ/-((3R,5/?)-1-cyano-5-{[(4- fluorophenyl)oxy]methyl}-3-pyrrolidinyl)benzenesulfonamide
Figure imgf000148_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-4-amino-2-{[(4-fluorophenyl)oxy]methyl}-1- pyrrolidinecarboxylate (70 mg, 0.226 mmol) in dichloromethane (8 ml) was added DIEA (0.079 ml, 0.452 mmol followed by adding 2,5-dibromobenzenesulfonyl chloride (75 mg, 0.226 mmol) at room temperature with stirring. The reaction mixture was kept stirring under argon for 2h at room temperature then diluted with DCM and washed with 1 N HCI and saturated NaHCO3. The DCM layer was dried (Na2SO4) and evaporated to give the crude as a pale yellow oil, which was mixed with 4 N HCI in dioxane (4 ml.) for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (10 ml_). To the resultant mixture, DIEA (4 eq) and a CNBr solution (1.5 eq) were added and stirred for 1 hour at room temperature. A PS-trisamine resin (0.5 g, 3.41 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford the 2,5-dibromo-Λ/- ((3R,5R)-1-cyano-5-{[(4-fluorophenyl)oxy]methyl}-3-pyrrolidinyl)benzenesulfonamide (45 mg, 37%). LC-MS: m/z, 534 (M+H), rt 2.24 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 2.06 (t, J=2.38 Hz, 1 H) 2.47 (dt, J=9.98, 6.93 Hz, 1 H) 3.35 (ddd, J=10.16, 2.38, 1.25 Hz, 1 H) 3.49 (dd, J=10.29, 5.02 Hz, 1 H) 3.99 (d, J=2.76 Hz, 1 H) 4.01 - 4.07 (m, 3 H) 4.31 (dd, J=10.29, 2.26 Hz, 1 H) 6.73 (d, J=8.53 Hz, 1 H) 6.99 - 7.07 (m, 4 H) 7.56 - 7.63 (m, 2 H) 8.30 (d, J=2.01 Hz, 1 H)
Example 73 2,5-Dichloro-Λ/-((3/?,5/?)-1-cyano-5-{[(4- fluorophenyl)oxy]methyl}-3-pyrrolidinyl)benzenesulfonamide
Figure imgf000149_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-4-amino-2-{[(4-fluorophenyl)oxy]methyl}-1- pyrrolidinecarboxylate (70 mg, 0.226 mmol) in dichloromethane (8 ml) was added DIEA (0.079 ml, 0.452 mmol followed by adding 2,5-dichlorobenzenesulfonyl chloride (55 mg, 0.226 mmol) at room temperature with stirring. The reaction mixture was kept stirring under argon for 2h at room temperature then diluted with DCM and washed with 1 N HCI and saturated NaHCO3. The DCM layer was dried (Na2SO4) and evaporated to give the crude as a pale yellow oil, which was mixed with 4 N HCI in dioxane (4 ml.) for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (10 ml_). To the resultant mixture, DIEA (4 eq) and a CNBr solution (1.5 eq) were added and stirred for 1 hour at room temperature. A PS-trisamine resin (0.5 g, 3.41 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford 2,5-dichloro-Λ/- ((3R,5R)-1-cyano-5-{[(4-fluorophenyl)oxy]methyl}-3-pyrrolidinyl)benzenesulfonamide (56 mg, 56%). LC-MS: m/z, 446 (M+H), rt 2.18 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 2.05 (dd, J=17.07, 3.01 Hz, 1 H) 2.47 (dt, J=9.85, 7.12 Hz, 1 H) 3.35 (dd, J=9.41 , 1.63 Hz, 1 H) 3.50 (dd, J=10.29, 5.02 Hz, 1 H) 3.98 (d, J=2.51 Hz, 1 H) 4.01 - 4.08 (m, 2 H) 4.30 (dd, J=10.29, 2.51 Hz, 1 H) 6.67 (d, J=9.03 Hz, 1 H) 6.98 - 7.02 (m, 2 H) 7.04 - 7.08 (m, 2 H) 7.47 - 7.54 (m, 1 H) 7.50 (q, J=8.53 Hz, 1 H) 8.12 (d, J=2.26 Hz, 1 H)
Example 74 2-Bromo-5-chloro-Λ/-[(3/?,5S)-1-cyano-5-methyl-3- pyrrolidinyl]-4-fluorobenzenesulfonamide
Figure imgf000149_0002
To 1 , 1 -dimethylethyl (2S,4R)-4-amino-2-methyl-1-pyrrolidinecarboxylate (0.100 g, 0.50 mmol) in DCM (5 ml.) was added TEA (0.139 ml_, 1.0 mmol) and 5-bromo-2-chloro- 4-fluorobenzenesulfonyl chloride (154 mg,0.50 mmol). The resultant mixture was stirred at room temperature overnight followed by dilution with DCM. The mixture was washed with 1 N HCI and saturated NaHCO3, and the DCM layer was dried (Na2SO4) and evaporated. The residue was mixed with 4 N HCI in dioxane (4 ml.) for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (5 ml_). To the resultant mixture, DIEA (0.35 ml_, 2.0 mmol, 4 eq) and CNBr solution (0.25 ml_, 0.75 mmol, 1.5 eq) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.5 g, 3.41 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford 2-bromo-5-chloro-Λ/-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-4- fluorobenzenesulfonamide (93 mg, 47%). LC-MS: m/z, 398 (M+H), rt 1.83 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.29 (d, J=6.27 Hz, 3 H) 1.38 - 1.44 (m, 1 H) 2.20 (dt, J=12.86, 6.49 Hz, 1 H) 3.19 (dd, J=10.04, 7.03 Hz, 1 H) 3.46 (dd, J=9.79, 7.28 Hz, 1 H) 3.55 (dt, J=9.29, 6.27 Hz, 1 H) 3.78 - 3.84 (m, 1 H) 5.33 (d, J=8.03 Hz, 1 H) 7.28 (d, J=7.53 Hz, 1 H) 8.25 (d, J=7.03 Hz, 1 H)
Example 75 2,5-Dichloro-Λ/-[(3R,5S)-1 -cyano-5-methyl-3-pyrrolidinyl]- 4-fluorobenzenesulfonamide
Figure imgf000150_0001
To 1 ,1 -dimethylethyl (2S,4R)-4-amino-2-methyl-1-pyrrolidinecarboxylate (0.100 g, 0.50 mmol) in DCM (5 mL) was added TEA (0.139 mL, 1.0 mmol) and 2,5-dichloro-4- fluorobenzenesulfonyl chloride (132 mg, 0.50 mmol). The resultant mixture was stirred at room temperature overnight followed by dilution with DCM. The mixture was washed with 1 N HCI and saturated NaHCO3, and the DCM layer was dried (Na2SO4) and evaporated. The residue was mixed with 4 N HCI in dioxane (4 mL) for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (5 mL). To the resultant mixture, DIEA (0.35 mL, 2.0 mmol, 4 eq) and CNBr solution (0.25 mL, 0.75 mmol, 1.5 eq) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.5 g, 3.41 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford 2,5- dichloro-Λ/-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-4-fluorobenzenesulfonamide (92 mg, 52%). LC-MS: m/z, 354 (M+H), rt 0.9 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.38 (d, J=6.27 Hz, 3 H) 1.44 - 1.51 (m, 1 H) 2.30 (dt, J=12.86, 6.49 Hz, 1 H) 3.28 (dd, J=10.04, 7.03 Hz, 1 H) 3.55 (dd, J=10.04, 7.28 Hz, 1 H) 3.59 - 3.67 (m, J=6.27, 3.51 , 3.14, 3.14 Hz, 1 H) 3.89 (d, J=7.78 Hz, 1 H) 5.41 (br. s., 1 H) 7.41 (d, J=8.03 Hz, 1 H) 8.21 (d, J=7.53 Hz, 1 H)
Example 76 2-Bromo-5-chloro-Λ/-[(3/?,5S)-1 -cyano-5-methyl-3- pyrrolidinyl]-4-fluorobenzenesulfonamide
Figure imgf000151_0001
To 1 ,1-dimethylethyl (2S,4R)-4-amino-2-methyl-1-pyrrolidinecarboxylate (0.100 g, 0.50 mmol) in DCM (5 mL) was added TEA (0.139 mL, 1.0 mmol) and 2-bromo-5-chloro- 4-fluorobenzenesulfonyl chloride (154 mg, 0.50 mmol). The resultant mixture was stirred at room temperature overnight followed by dilution with DCM. The mixture was washed with 1 N HCI and saturated NaHCO3, and the DCM layer was dried (Na2SO4) and evaporated. The residue was mixed with 4 N HCI in dioxane (4 mL) for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (5 mL). To the resultant mixture, DIEA (0.35 mL, 2.0 mmol, 4 eq) and CNBr solution (0.25 mL, 0.75 mmol, 1.5 eq) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.5 g, 3.41 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford 2-bromo-5-chloro-Λ/-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-4- fluorobenzenesulfonamide (57 mg, 29%). LC-MS: m/z, 398 (M+H), rt 0.93 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 0.75 (t, J=7.40 Hz, 7 H) 1.39 - 1.45 (m, 5 H) 1.72 (dd, J=13.93, 2.13 Hz, 1 H) 2.20 (ddd, J=10.10, 3.70, 3.51 Hz, 1 H) 2.37 (d, J=2.51 Hz, 1 H) 2.41 (d, J=2.26 Hz, 1 H) 2.44 - 2.50 (m, 4 H) 2.77 (dd, J=15.18, 3.14 Hz, 1 H) 3.29 (d, J=4.27 Hz, 1 H) 3.31 (d, J=4.52 Hz, 1 H) 3.35 - 3.42 (m, 1 H) 3.69 (dq, J=10.04, 2.68 Hz, 1 H) 3.79 (dd, J=6.15, 4.64 Hz, 1 H) 7.38 (d, J=2.26 Hz, 1 H) 7.40 (d, J=2.51 Hz, 1 H) 7.44 - 7.51 (m, 1 H) 8.14 (d, J=2.51 Hz, 1 H) 9.43 (br. s., 1 H) Example 77 2,5-Dibromo-Λ/-{(3/?,5/?)-1-cyano-5-[(dipropylamino) methyl]-3-pyrrolidinyl}benzenesulfonamide
Figure imgf000152_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5- dibromophenyl)sulfonyl]amino}-1-pyrrolidinecarboxylate (100 mg, 0.19 mmol) in methanol (4 ml), was added propanal (0.056 ml, 0.779 mmol). The reaction mixture was stirred at room temperature for 30 min followed by addition of sodium borohydride (29.5 mg, 0.779 mmol). After 30 min, more propanal (0.056 ml, 0.779 mmol) was added and the mixture was stirred at room temperature for 30 min followed by addition of sodium borohydride (29.5 mg, 0.779 mmol). The reaction mixture was kept stirring overnight. The reaction was quenched with water, and extracted with ethyl acetate. The ethyl acetate layer was dried (Na2SO4) and evaporated to give the crude as a pale yellow oil, which was purified by preparatory HPLC (without TFA). (35 mg, 30%). The product prepared above (35 mg, 0.059 mmol) was mixed with 4 N HCI in dioxane (4 ml.) for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (2 ml_). To the resultant mixture,
DIEA (0.04 ml_, 0.234 mmol, 4 eq) and CNBr solution (0.03 ml_, 0.09 mmol, 1.5 eq) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.5 g, 3.41 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford 2,5-Dibromo-N-{(3R,5R)-1 -cyano-5-[(dipropylamino) methyl]-3- pyrrolidinyl}benzenesulfonamide (14 mg, 46%). LC-MS: m/z, 523 (M+H), rt 0.78 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.39 (d, J=6.27 Hz, 3 H) 1.45 - 1.52 (m, 1 H) 2.30 (dt, J=13.05, 6.53 Hz, 1 H) 3.28 (dd, J=10.04, 7.03 Hz, 1 H) 3.54 (dd, J=9.79, 7.28 Hz, 1 H) 3.64 (dt, J=9.03, 6.27 Hz, 1 H) 3.88 (br. s., 1 H) 5.45 (br. s., 1 H) 7.60 (d, J=8.03 Hz, 1 H) 8.25 (d, J=7.53 Hz, 1 H)
Example 78 2,5-Dibromo-Λ/-((3/?,5/?)-1-cyano-5-{[(phenylmethyl)oxy] methyl}- 3-pyrrolidinyl)benzenesulfonamide
Figure imgf000153_0001
In a 20 ml flask was diluted 1 ,1-dimethylethyl (2R,4R)-4-amino-2- {[(phenylmethyl)oxy]methyl}-1-pyrrolidinecarboxylate (0.191 g, 0.625 mmol) in DCM (2 ml) to give a colorless solution. Then DIPEA (0.218 ml, 1.250 mmol) and dibromobenzenesulfonylchloride (0.209 g, 0.625 mmol) were added. The reaction mixture was stirred at room temperature for 16 hr followed by evaporation. The residue was loaded onto a SPE catridge (silica, 5 g) and eluted sequencially with DCM, EtOAc. The EtOAc fractions were recovered and concentrated to yield the desired product as an oil, which was mixed with 4 N HCI in dioxane (4 ml.) for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (10 ml_). To the resultant mixture, DIEA (0.12 ml_, 0.688 mmol, 4 eq) and CNBr solution (0.086 mL, 0.258 mmol, 1.5 eq) were added and stirred for 1 hour at room temperature. PS-trisamine (0.5 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford 2,5-dibromo-Λ/- ((3R,5R)-1-cyano-5-{[(phenylmethyl)oxy] methyl}-3-pyrrolidinyl)benzenesulfonamide
(44 mg, 46%). LC-MS: m/z, 530 (M+H), rt 1.15 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.95 (dd, J=14.05, 2.26 Hz, 1 H) 2.23 (d, J=5.77 Hz, 1 H) 2.21 (s, 1 H) 2.35 (ddd, J=6.90, 3.64, 3.51 Hz, 1 H) 3.25 - 3.33 (m, 1 H) 3.42 (dd, J=10.16, 4.89 Hz, 1 H) 3.54 (dd, J=10.79, 2.01 Hz, 1 H) 3.80 - 3.87 (m, 3 H) 3.87 (s, 1 H) 3.96 (dt, J=4.71 , 2.29 Hz, 1 H) 4.09 - 4.16 (m, 2 H) 6.92 - 6.99 (m, 3 H) 7.04 (d, J=9.29 Hz, 1 H) 7.27 - 7.35 (m, 3 H) 7.52 - 7.57 (m, 1 H) 7.58 - 7.63 (m, 1 H) 8.28 (d, J=2.26 Hz, 1 H)
Example 79 2,5-Dibromo-Λ/-((3/?,5/?)-1-cyano-5-{[(phenylmethyl)oxy] methyl}- 3-pyrrolidinyl)benzenesulfonamide
Figure imgf000154_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-4-amino-2-({[3-(phenyloxy)propyl]oxy}methyl)- 1-pyrrolidinecarboxylate (0.092 g, 0.263 mmol) in dichloromethane (DCM) (1.5 ml) were added DIEA (0.092 ml, 0.525 mmol) and dibromobenzenesulphonylchloride (0.097 g, 0.289 mmol). The resulting mixture was stirred at room temperature for 16 h. The crude was then purified using SPE (silica, 5 g) eluting sequentially with hexane, DCM, ether and ethyl acetate. The corresponding fractions were recovered and concentrated to yield the desired product as an orange oil which was mixed with 4 N HCI in dioxane (4 ml.) for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (10 ml_). To the resultant mixture, DIEA (0.10 ml_, 0.58 mmol, 4 eq) and CNBr solution (0.072 ml_, 0.217 mmol, 1.5 eq) were added and stirred for 1 hour at room temperature. PS-trisamine (0.5 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford the 2,5-dibromo-Λ/-((3R,5R)-1-cyano-5-{[(phenylmethyl)oxy] methyl}-3-pyrrolidinyl)benzenesulfonamide (43 mg, 52%). LC-MS: m/z, 574 (M+H), rt 1.22 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.94 (dd, J=14.05, 2.26 Hz, 1 H) 2.36 (dd, J=7.03, 3.51 Hz, 1 H) 3.29 (dt, J=10.23, 1.54 Hz, 1 H) 3.43 (dd, J=10.29, 5.02 Hz, 1 H) 3.54 (dd, J=10.54, 1.76 Hz, 1 H) 3.84 (t, J=1.88 Hz, 1 H) 3.84 - 3.90 (m, 1 H) 4.03 (td, J=4.64, 2.26 Hz, 1 H) 4.59 - 4.66 (m, 1 H) 4.75 (d, J= 11.54 Hz, 1 H) 6.84 (d, J=9.29 Hz, 1 H) 7.36 - 7.43 (m, 5 H) 7.51 - 7.54 (m, 1 H) 7.55 - 7.59 (m, 1 H)
Example 80 N-{[(2R,4R)-4-({[5-Chloro-2-(methyloxy)phenyl]sulfonyl}amino)-1 - cyano-2-pyrrolidinyl]methyl}-2,2-dimethylpropanamide
Figure imgf000155_0001
To a solution of 1 ,1-dimethylethyl (2R,4/?)-2-(aminomethyl)-4-({[5-chloro-2- (methyloxy)phenyl]sulfonyl}amino)-1-pyrrolidinecarboxylate (280 mg, 0.667 mmol) in DCM (10 ml.) was added TEA (0.186 mL, 1.344 mmol) followed by trimethylacetyl chloride (88 mg, 0.733 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N HCI and saturated NaHCO3. The DCM layer was isolated and evaporated to give a crude oil that was purified by automated flash chromatography (12 g of silica cartridge) to afford a colorless oil (234 mg, 70%). This oily product (234 mg, 0.464 mmol) was treated with 4 N HCI in dioxane (4 mL). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (5 mL). To the resultant mixture, DIEA (0.324 mL, 1.857 mmol) and a CNBr solution (0.232 mL, 0.696 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.5 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford N-{[(2R,4R)-4-({[5- chloro-2-(methyloxy)phenyl]sulfonyl}amino)-1-cyano-2-pyrrolidinyl]methyl}-2,2- dimethylpropanamide (104 mg, 52%). LC-MS: m/z, 429 (M+H), rt 0.86 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 7.90 (d, J=2.51 Hz, 1 H), 7.54 (dd, J=8.91 , 2.64 Hz, 1 H), 7.02 (d, J=8.78 Hz, 1 H), 6.22 (d, J=5.27 Hz, 1 H), 6.16 (br. s., 1 H), 4.04 (s, 3 H), 3.63 - 3.80 (m, 3 H), 3.48 - 3.56 (m, 2 H), 3.37 - 3.44 (m, 1 H), 2.07 - 2.14 (m, 1 H), 1.67 - 1.75 (m, 1 H), 1.24 (s, 9 H)
Example 81 N-{[(2R,4R)-4-({[5-Bromo-2-
(methyloxy)phenyl]sulfonyl}amino)-1-cyano-2- pyrrolidinyl]methyl}-2,2-dimethylpropanamide
Figure imgf000156_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-({[5-brom-2- (methyloxy)phenyl]sulfonyl}amino)-1-pyrrolidinecarboxylate (330 mg, 0.711 mmol) in DCM (10 ml.) was added TEA (0.297 ml_, 2.132 mmol) followed by trimethylacetyl chloride (171 mg, 1.421 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N HCI and saturated NaHCO3. The DCM layer was isolated and evaporated to give a crude oil that was purified by automated flash chromatography (12 g of silica cartridge) to afford a colorless oil (300 mg, 77%). This oily product (300 mg, 0.547 mmol) was treated with 4 N HCI in dioxane (4 ml_). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (4 ml_). To the resultant mixture, DIEA (0.382 ml_, 2.188 mmol) and CNBr solution (0.273 ml_, 0.82 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.5 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford N-{[(2R,4R)-4-({[5-bromo-2- (methyloxy)phenyl]sulfonyl}amino)-1-cyano-2-pyrrolidinyl]methyl}-2,2- dimethylpropanamide (151 mg, 58%). LC-MS: m/z, 475 (M+H), rt 0.87 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.24 (s, 9 H) 1.71 (d, J=13.55 Hz, 1 H) 2.07 - 2.14 (m, 1 H) 3.37 - 3.45 (m, 1 H) 3.53 (dd, J=8.66, 5.14 Hz, 2 H) 3.68 (d, J=6.78 Hz, 1 H) 3.70 - 3.77 (m, 1 H) 3.73 (dd, J=14.31 , 6.27 Hz, 1 H) 4.04 (s, 3 H) 6.15 (br. s., 1 H) 6.21 (d, J=5.02 Hz, 1 H) 6.97 (d, J=8.78 Hz, 1 H) 7.69 (dd, J=8.78, 2.51 Hz, 1 H) 8.03 (d, J=2.51 Hz, 1 H) Example 82 N-{[(2R,4R)-4-({[2,5-
Bis(methyloxy)phenyl]sulfonyl}amino)-1-cyano-2- pyrrolidinyl]methyl}-2,2-dimethylpropanamide
Figure imgf000157_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-({[2,5- bis(methyloxy)phenyl]sulfonyl}amino)-1-pyrrolidinecarboxylate (280 mg, 0.674 mmol) in DCM (10 ml.) was added TEA (0.282 mL, 2.022 mmol) followed by trimethylacetyl chloride (163 mg, 1.348 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N HCI and saturated NaHCO3. The DCM layer was isolated and evaporated to give a crude oil that was purified by automated flash chromatography (12 g of silica cartridge) to afford a colorless oil (280 mg, 83%). This oily product (280 mg, 0.560 mmol) was treated with 4 N HCI in dioxane (4 mL). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (4 mL). To the resultant mixture, DIEA (0.392 mL, 2.242 mmol) and CNBr solution (0.280 mL, 0.841 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.5 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford N-{[(2R,4R)-4- ({[2,5-bis(methyloxy)phenyl]sulfonyl}amino)-1-cyano-2-pyrrolidinyl]methyl}-2,2- dimethylpropanamide (151 mg, 64%). LC-MS: m/z, 425 (M+H), rt 0.79 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.21 (s, 9 H) 1.65 (d, J=13.30 Hz, 1 H) 2.08 (d, J=6.78 Hz, 1 H) 3.42 (dd, J=16.06, 6.02 Hz, 1 H) 3.46 - 3.51 (m, 1 H) 3.63 (dt, J=14.05, 6.27 Hz, 1 H) 3.74 (s, 1 H) 3.72 (d, J=6.27 Hz, 1 H) 3.83 (s, 3 H) 3.97 (s, 3 H) 6.08 (d, J=5.52 Hz, 1 H) 6.24 - 6.32 (m, 1 H) 7.00 (d, J=9.03 Hz, 1 H) 7.10 (d, J=3.26 Hz, 1 H) 7.13 (d, J=3.26 Hz, 1 H) 7.43 (d, J=3.26 Hz, 1 H) Example 83 N-({(2R,4R)-4-[{[5-Bromo-2-
(methyloxy)phenyl]sulfonyl}(phenylmethyl)amino]-1- cyano-2-pyrrolidinyl}methyl)-2,2-dimethylpropanamide
Figure imgf000158_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-[{[5-bromo-2- (methyloxy)phenyl]sulfonyl}(phenylmethyl)amino]-1-pyrrolidinecarboxylate (280 mg, 0.505 mmol) in DCM (10 ml.) was added TEA (0.21 1 ml_, 1.515 mmol) followed by trimethylacetyl chloride (73 mg, 0.61 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N HCI and saturated NaHCOs. The DCM layer was isolated and evaporated to give a crude oil that was purified by automated flash chromatography (12 g of silica cartridge) to afford colorless oil (280 mg, 87%). The oily product (280 mg, 0.438 mmol) prepared above was treated with 4 N HCI in dioxane (4 ml_). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (4 ml_). To the resultant mixture, DIEA (0.32 ml_, 1.83 mmol) and CNBr solution (0.23 ml_, 0.69 mmol) were added and stirred for an additional 1 hour at room temperature. PS- trisamine (0.5 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford N-({(2R,4R)-4-[{[5-bromo-2- (methyloxy)phenyl]sulfonyl}(phenylmethyl)amino]-1-cyano-2-pyrrolidinyl}methyl)-2,2- dimethylpropanamide (159 mg, 64%). LC-MS: m/z, 565 (M+H), rt 1.1 1 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.18 (s, 9 H) 1.68 (s, 1 H) 1.88 (d, J=6.27 Hz, 1 H) 1.90 (s, 1 H) 3.15 (t, J=9.66 Hz, 1 H) 3.24 - 3.29 (m, 1 H) 3.31 (s, 1 H) 3.53 (d, J=6.02 Hz, 1 H) 3.64 (d, J=6.53 Hz, 1 H) 3.98 (s, 3 H) 4.37 (s, 1 H) 4.39 - 4.45 (m, 1 H) 4.63 (d, J=16.56 Hz, 1 H) 6.06 (s, 1 H) 6.93 (d, J=8.78 Hz, 1 H) 7.28 - 7.35 (m, 5 H) 7.64 (dd, J=8.78, 2.51 Hz, 1 H) 8.00 (d, J=2.51 Hz, 1 H)
Example 84 N-({(2R,4R)-4-[{[2,5- Bis(methyloxy)phenyl]sulfonyl}(phenylmethyl)amino]-1- cyano-2-pyrrolidinyl}methyl)-2,2-dimethylpropanamide
Figure imgf000159_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-[{[2,5- bis(methyloxy)phenyl]sulfonyl}(phenylmethyl)amino]-1-pyrrolidinecarboxylate (270 mg, 0.534 mmol) in DCM (10 ml.) was added TEA (0.149 ml_, 1.068 mmol) followed by trimethylacetyl chloride (77 mg, 0.641 mmol) at room temperature while stirring. The reaction mixture was stirred at room temperature for 1 hour, washed with 1 N HCI and saturated NaHCO3. The DCM layer was isolated and evaporated to give a crude oil that was purified by automated flash chromatography (12 g of silica cartridge) to afford colorless oil (270 mg, 86%). The oily product (270 mg, 0.458 mmol) prepared above was treated with 4 N HCI in dioxane (4 ml_). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (4 ml_). To the resultant mixture, DIEA (0.32 ml_, 1.83 mmol) and CNBr solution (0.23 ml_, 0.69 mmol) were added and stirred for an additional 1 hour at room temperature. PS- trisamine (0.5 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford N-({(2R,4R)-4-[{[2,5- bis(methyloxy)phenyl]sulfonyl}(phenylmethyl)amino]-1-cyano-2-pyrrolidinyl}methyl)-2,2- dimethylpropanamide (192 mg, 81%). LC-MS: m/z, 515 (M+H), rt 1.00 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.18 (s, 9 H) 1.64 (d, J=1 1.04 Hz, 1 H) 1.86 (d, J=6.27 Hz, 1 H) 1.88 (s, 1 H) 3.13 (t, J=9.66 Hz, 1 H) 3.18 - 3.25 (m, 1 H) 3.27 (s, 1 H) 3.54 (dd, J=14.31 , 6.27 Hz, 1 H) 3.61 (dd, J=6.53, 3.51 Hz, 1 H) 3.82 (s, 3 H) 3.94 (s, 3 H) 4.43 (d, J=16.56 Hz, 2 H) 4.63 (d, J=16.56 Hz, 1 H) 6.05 (s, 1 H) 6.98 (d, J=9.03 Hz, 1 H) 7.09 (d, J=3.26 Hz, 1 H) 7.1 1 (d, J=3.26 Hz, 1 H) 7.28 - 7.35 (m, 5 H) 7.45 (d, J=3.26 Hz, 1 H)
Example 85 2,5-Dichloro-N-((3R,5R)-1-cyano-5-{[({[2-
(methyloxy)ethyl]amino}carbonyl)amino]methyl}-3- pyrrolidinyl)benzenesulfonamide
Figure imgf000160_0001
To a solution of 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5- dichlorophenyl)sulfonyl]amino}-1-pyrrolidinecarboxylate (80 mg, 0.189 mmol) in THF (3 ml), was added TEA (0.053 ml, 0.377 mmol) followed by phenyl chloroformate (0.026 ml, 0.207 mmol). The reaction mixture was stirred at room temperature overnight then diluted with DCM and washed with 1 N HCI and saturated NaHCOβ. The DCM layer was dried (Na2SC>4) and evaporated to give the crude as a white solid, which was mixed with 2- (methyloxy)ethanamine (138 mg, 1.837 mmol) in 1 ,2-Dichloroethane (DCE) (3 ml) The resultant mixture was heated by microwave at 100 0C for 80 min and 120 0C for 2 hr. The mixture was diluted with DCM and 1 N NaOH. The organic layer was isolated via a hydrophobic frit and evaporated. The crude material was purified by loading it onto a NH2 SPE (2 g) and eluting sequentially with DCM(3 x) and ethyl acetate (3 x)). The ethyl acetate fractions were combined and evaporated to give the desired product (73 mg, 76%).
The product described in the foregoing paragaraph was treated with 4 N HCI in dioxane (2 ml_). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (2 ml_). To the resultant mixture, DIEA (0.097 ml_, 0.556 mmol) and CNBr solution (0.070 ml_, 0.21 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.2 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford 2,5-dichloro-N-((3R,5R)-1-cyano-5-{[({[2-(methyloxy)ethyl]amino}carbonyl)amino]- methyl}-3-pyrrolidinyl)benzenesulfonamide (15 mg, 24%). LC-MS: m/z, 452 (M+H), rt 0.72 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.89 (t, J=6.40 Hz, 1 H) 2.13 - 2.19 (m, 1 H) 3.36 - 3.41 (m, 5 H) 3.48 (q, J=5.02 Hz, 2 H) 3.47 (d, J=19.07 Hz, 1 H) 3.54 (ddd, J=6.53, 3.14, 2.89 Hz, 2 H) 3.71 (qd, J=6.02, 5.77 Hz, 1 H) 3.86 (br. s., 1 H) 5.48 (t, J=5.52 Hz, 1 H) 5.62 (br. s., 1 H) 7.35 (br. s., 1 H) 7.46 - 7.53 (m, 1 H) 7.50 (d, J=1.76 Hz, 1 H) 8.09 (d, J=2.01 Hz, 1 H) Example 86 2,5-Dibromo-W-((3/?,5/?)-1-cyano-5-{[({[2-(methyloxy) ethyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl) benzenesulfonamide
Figure imgf000161_0001
A mixture of 1 ,1-dimethylethyl (2/?,4/?)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2- ({[(phenyloxy) carbonyl]amino}methyl)-1-pyrrolidinecarboxylate (150 mg, 0.237 mmol) and 2-(methyloxy)ethanamine (0.204 mL, 2.368 mmol) in 1 ,2-Dichloroethane (DCE) (3 ml) was heated by microwave at 120 0C for 1 h. The mixture was directly loaded onto a 5 g Si SPE cartridge eluting sequentially with DCM (3 volumes) and ethyl acetate (3 volumes). The ethyl acetate fractions were combined and evaporated to give the desired product (100 mg, 69%). This material was treated with 4 N HCI in dioxane (2 mL). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (2 mL). To the resultant mixture, DIEA (0.1 14 mL, 0.651 mmol) and CNBr solution (0.081 mL, 0.244 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.2 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford 2,5-dibromo-Λ/- ((3R,5R)-1-cyano-5-{[({[2-(methyloxy) ethyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl) benzenesulfonamide (57 mg, 65%). LC-MS: m/z, 452 (M+H), rt 0.83 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.90 (ddd, J=13.43, 5.90, 5.77 Hz, 1 H) 2.17 (t, J=7.28 Hz, 1 H) 3.36 - 3.42 (m, 1 H) 3.41 (s, 5 H) 3.48 - 3.55 (m, 5 H) 3.72 (dd, J=7.15, 5.65 Hz, 1 H) 3.85 (br. s., 1 H) 5.39 (t, J=5.52 Hz, 1 H) 7.55 - 7.59 (m, 1 H) 7.60 - 7.64 (m, 1 H) 8.27 (d, J=2.51 Hz, 1 H)
Example 87 N-[((2R,4R)-1-Cyano-4-{[(2,5- dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl]-4- morpholinecarboxamide
Figure imgf000162_0001
A mixture of 1 ,1-dimethylethyl (2/?,4/?)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2- ({[(phenyloxy) carbonyl]amino}methyl)-1-pyrrolidinecarboxylate (150 mg, 0.237 mmol) and morpholine (0.103 ml_, 1.184 mmol) in 1 ,2-Dichloroethane (DCE) (3 ml) was heated by microwave at 120 0C for 1 h. The mixture was directly loaded onto a 5 g Si SPE cartridge eluting sequentially with DCM (3 volumes) and EA (3 volumes). The ethyl acetate fractions were combined and evaporated to give the desired product (141 mg, 95%). This material was treated with 4 N HCI in dioxane (2 ml_). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (2 ml_). To the resultant mixture, DIEA (0.157 ml_, 0.900 mmol) and CNBr solution (0.113 ml_, 0.338 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.2 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford N-[((2R,4R)-1-cyano-4-{[(2,5- dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl]-4-morpholinecarboxamide (50 mg, 40%). LC-MS: m/z, 552 (M+H), rt 1.55 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.80 (ddd, J=13.11 , 6.46, 6.27 Hz, 1 H) 2.04 - 2.1 1 (m, 1 H) 3.34 - 3.40 (m, 5 H) 3.44 - 3.52 (m, 5 H) 3.68 (qd, J=6.07, 5.90 Hz, 1 H) 3.80 (qd, J=6.07, 5.90 Hz, 1 H) 3.99 (s, 3 H) 5.43 (t, J=5.52 Hz, 1 H) 5.62 (br. s., 1 H) 6.67 (br. s., 1 H) 7.01 (d, J=9.03 Hz, 1 H) 7.52 (dd, J=8.91 , 2.64 Hz, 1 H) 7.88 (d, J=2.76 Hz, 1 H)
Example 88 5-Chloro-Λ/-((3/?,5R)-1-cyano-5-{[({[2-
(methyloxy)ethyl]amino}carbonyl)amino]methyl}-3- pyrrolidinyl)-2-(methyloxy)benzenesulfonamide
Figure imgf000163_0001
A mixture of 1 ,1-dimethylethyl (2/?,4/?)-4-({[5-chloro-2-(methyloxy)phenyl]sulfonyl} amino)- 2-({[(phenyloxy)carbonyl]amino}methyl)-1-pyrrolidinecarboxylate (160 mg, 0.296 mmol) and 2-(methyloxy)ethanamine (0.255 ml_, 2.96 mmol) in 1 ,2-dichloroethane (3 ml) was heated by microwave at 100 0C for 1 h. The mixture was diluted with DCM and 1 N NaOH. The organic layer was isolated via a hydrophobic frit. The solvent was removed in vacuo to give the desired product (150 mg, 97%). This material was treated with 4 N HCI in dioxane (2 ml_). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (2 ml_). To the resultant mixture, DIEA (0.201 ml_, 1.152 mmol) and CNBr solution (0.144 ml_, 0.432 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.2 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford 5-chloro-Λ/-((3R,5R)-1-cyano-5-{[({[2-(methyloxy)ethyl]amino}carbonyl)amino]- methyl}-3-pyrrolidinyl)-2-(methyloxy)benzenesulfonamide (70 mg, 55%). LC-MS: m/z, 447 (M+H), rt θ.78 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.90 (d, J=13.80 Hz, 1 H) 2.19 (s, 1 H) 2.21 (d, J=6.78 Hz, 1 H) 3.40 (s, 1 H) 3.42 (d, J=5.02 Hz, 3 H) 3.49 - 3.56 (m, 1 H) 3.53 (d, J=4.27 Hz, 2 H) 3.66 (d, J=14.81 Hz, 1 H) 3.71 - 3.75 (m, 4 H) 3.78 (t, J=8.16 Hz, 1 H) 3.79 (d, J=6.27 Hz, 1 H) 4.99 (s, 1 H) 6.80 (d, J=5.77 Hz, 1 H) 7.56 - 7.60 (m, 1 H) 7.61 - 7.65 (m, 1 H) 8.28 (d, J=2.26 Hz, 1 H) Example 89 Λ/-{[(2R,4R)-4-({[5-Chloro-2-(methyloxy)phenyl]sulfonyl} amino)-1-cyano-2-pyrrolidinyl]methyl}-4- morpholinecarboxamide
Figure imgf000164_0001
A mixture of 1 ,1-dimethylethyl (2/?,4/?)-4-({[5-chloro-2-(methyloxy)phenyl]sulfonyl} amino)- 2-({[(phenyloxy)carbonyl]amino}methyl)-1-pyrrolidinecarboxylate (160 mg, 0.296 mmol) and morpholine (0.258 ml_, 2.96 mmol) in 1 ,2-dichloroethane (3 ml) was heated by microwave at 120 0C for 2h. The mixture was diluted with DCM and 1 N NaOH. The organic layer was isolated via a hydrophobic frit. The solvent was removed in vacuo to give the desired product (152 mg, 96%). This material was treated with 4 N HCI in dioxane (2 ml_). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (2 ml_). To the resultant mixture, DIEA (0.199 ml_, 1.141 mmol) and CNBr solution (0.143 ml_, 0.428 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.2 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford /V-{[(2R,4R)-4-({[5-chloro-2-(methyloxy)phenyl]sulfonyl} amino)-1-cyano-2- pyrrolidinyl]methyl}-4-morpholinecarboxamide (83 mg, 64%). LC-MS: m/z, 552 (M+H), rt 1.42 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.82 (dt, J=13.55, 5.02 Hz, 1 H) 2.08 - 2.14 (m, 1 H) 3.36 - 3.40 (m, 4 H) 3.44 (t, J=6.15 Hz, 1 H) 3.47 - 3.54 (m, 1 H) 3.50 (d, J=5.77 Hz, 1 H) 3.59 (t, J=6.15 Hz, 1 H) 3.70 (br. s., 1 H) 3.68 (d, J=5.02 Hz, 3 H) 3.74 (t, J=5.65 Hz, 1 H) 3.95 (s, 1 H) 4.00 (s, 3 H) 5.37 (t, J=6.02 Hz, 1 H) 6.46 (br. s., 1 H) 7.01 (d, J=8.78 Hz, 1 H) 7.53 (dd, J=8.78, 2.76 Hz, 1 H) 7.87 (d, J=2.76 Hz, 1 H)
Example 90 Λ/-((3/?,5/?)-5-{[(Aminocarbonyl)amino]methyl}-1 -cyano-3- pyrrolidinyl)-5-chloro-2-(methyloxy)benzenesulfonamide
Figure imgf000165_0001
A mixture of 1 ,1-dimethylethyl (2/?,4/?)-4-({[5-chloro-2-(methyloxy)phenyl]sulfonyl} amino)- 2-({[(phenyloxy)carbonyl]amino}methyl)-1-pyrrolidinecarboxylate (160 mg, 0.296 mmol) and ammonium hydroxide (30%, 0.39 ml_, 2.96 mmol) in DMSO (3 ml) was heated by microwave at 100 0C for 2h. The mixture was directly purified by preparatory HPLC (without TFA) to afford the desired compound. (38 mg, 28%).The product (38 mg, 0.082 mmol) prepared above was treated with 4 N HCI in dioxane (2 ml_). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (2 ml_). To the resultant mixture, DIEA (0.057 ml_, 0.33 mmol) and CNBr solution (0.041 ml_, 0.123 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.2 g, 3.43 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified by preparatory HPLC (without TFA) to afford N-((3R,5R)-5- {[(aminocarbony^aminoJmethylJ-i-cyano-S-pyrrolidiny^-δ-chloro^- (methyloxy)benzenesulfonamide. (19 mg, 59%). LC-MS: m/z, 390 (M+H), rt 0.75 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.76 (dt, J=13.36, 6.74 Hz, 1 H) 2.01 (s, 1 H) 2.08 (t, J=13.93 Hz, 1 H) 2.08 (d, J=13.30 Hz, 1 H) 3.33 - 3.41 (m, 6 H) 3.43 - 3.49 (m, 1 H) 3.45 (t, J=5.27 Hz, 3 H) 3.67 (dd, J=12.30, 1.76 Hz, 1 H) 3.73 - 3.79 (m, 1 H) 3.82 (s, 3 H) 3.94 (s, 3 H) 5.34 (t, J=5.65 Hz, 1 H) 5.55 (br. s., 1 H) 6.26 (d, J=5.77 Hz, 1 H) 6.99 (d, J=9.03 Hz, 1 H) 7.09 (d, J=3.26 Hz, 1 H) 7.11 (d, J=3.26 Hz, 1 H) 7.42 (d, J=3.01 Hz, 1 H)
Example 91 Λ/-((3R,5R)-1-Cyano-5-{[({[2-(methyloxy)ethyl]amino} carbonyl)amino]methyl}-3-pyrrolidinyl)-2,5- bis(methyloxy)benzenesulfonamide
Figure imgf000166_0001
A mixture of 1 ,1-dimethylethyl (2/?,4/?)-4-({[2,5-bis(methyloxy)phenyl] sulfonyl}amino)-2- ({[(phenyloxy)carbonyl]amino}methyl) -1-pyrrolidinecarboxylate (1 10 mg, 0.205 mmol) ) and ammonium hydroxide (30%, 0.27 ml_, 2.05 mmol) in 1 ,2-dichloroethane (3 ml) was heated by microwave at 120 0C for 2h. The mixture was diluted with DCM and 1 N NaOH. The organic layer was isolated via a hydrophobic frit. The solvent was removed in vacuo to give the desired product (1 13 mg, 98%). The product (113 mg, 0.219 mmol) prepared above was treated with 4 N HCI in dioxane (2 ml_). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (2 ml_). To the resultant mixture, DIEA (0.153 ml_, 0.875 mmol) and CNBr solution (0.1 1 ml_, 0.33 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.2 g, 3.41 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford Λ/-((3R,5R)-1-Cyano-5-{[({[2- (methyloxy)ethyl]amino} carbonyl)amino]methyl}-3-pyrrolidinyl)-2,5-bis(methyloxy)- benzenesulfonamide (54 mg, 54%). LC-MS: m/z, 442 (M+H), rt 0.64 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.79 (d, J=6.78 Hz, 1 H) 2.11 (d, J=6.78 Hz, 1 H) 3.40 - 3.47 (m, 3 H) 3.75 (dd, J=15.18, 6.65 Hz, 1 H) 3.83 (s, 3 H) 3.93 (s, 3 H) 5.25 (br. s., 2 H) 5.95 (t, J=6.15 Hz, 1 H) 6.78 (d, J=6.02 Hz, 1 H) 7.00 (d, J=9.29 Hz, 1 H) 7.10 (d, J=3.26 Hz, 1 H) 7.12 (d, J=3.26 Hz, 1 H) 7.42 (d, J=3.01 Hz, 1 H) Example 92 Λ/-((3/?,5/?)-5-{[(Aminocarbonyl)amino]methyl}-1 -cyano-3- pyrrolidinyl)-2,5-bis(methyloxy)benzenesulfonamide
Figure imgf000167_0001
A mixture of 1 ,1-dimethylethyl (2/?,4/?)-4-({[2,5-bis(methyloxy)phenyl] sulfonyl}amino)-2- ({[(phenyloxy)carbonyl]amino}methyl) -1-pyrrolidinecarboxylate (120 mg, 0.224 mmol) and 2-(methyloxy)ethanamine (0.193 mL, 2.240 mmol) in 1 ,2-dichloroethane (3 ml) was heated by microwave at 100 0C for 1 h. The mixture was directly purified by preparatory HPLC (without TFA) to afford the desired compound. (28 mg, 30%). The product (28 mg, 0.061 mmol) prepared above was treated with 4 N HCI in dioxane (2 mL). The reaction mixture was stirred at room temperature for 1 hour followed by evaporation. The mixture was re-dissolved in DCM (2 mL). To the resultant mixture, DIEA (0.043 mL, 0.244 mmol) and CNBr solution (0.031 mL, 0.092 mmol) were added and stirred for an additional 1 hour at room temperature. PS-trisamine (0.2 g, 3.41 mmol/g) was added and the mixture was stirred for 1 hour at room temperature. The resultant mixture was filtered, concentrated and purified on preparatory HPLC (without TFA) to afford N-((3R,5R)-5- {[(aminocarbonyl)amino]methyl}-1-cyano-3-pyrrolidinyl)-2,5- bis(methyloxy)benzenesulfonamide (10.3 mg, 44%). LC-MS: m/z, 442 (M+H), rt 0.66 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.83 (d, J=13.55 Hz, 1 H) 2.13 (d, J=6.78 Hz, 1 H) 2.16 (s, 1 H) 3.49 (t, J=5.27 Hz, 3 H) 3.52 (br. s., 1 H) 3.75 (d, J=6.02 Hz, 1 H) 3.76 - 3.83 (m, 1 H) 3.99 (s, 3 H) 5.09 (s, 2 H) 5.77 (t, J=6.27 Hz, 1 H) 6.80 (d, J=5.77 Hz, 1 H) 7.02 (d, J=9.03 Hz, 1 H) 7.54 (dd, J=8.78, 2.76 Hz, 1 H) 7.87 (d, J=2.76 Hz, 1 H)
Example 93 ((2/?,4/?)-1 -Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-pyrrolidinyl)methyl dimethylcarbamate
Figure imgf000168_0001
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-1-{[(1 ,1-dimethylethyl)oxy]carbonyl}-2- pyrrolidinyl)methyl I H-imidazole-1-carboxylate (59 mg, 0.096 mmol) was diluted in toluene (1 ml.) and mixed with dimethylamine (0.194 mmol) at room temperature overnight. More dimethylamine (0.194 mmol) was added and the mixture was stirred for another 24 hours at room temperature. The reaction mixture was diluted with DCM and washed with brine. The organic layer was separated via a hydrophobic frit and concentrated under vacuum to give 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-
({[(dimethylamino)carbonyl]oxy}methyl)-1-pyrrolidinecarboxylate as a crude material (57 mg, 64 % purity by LC/MS). This material was diluted in dioxane (0.5 ml.) and mixed with 4 N HCI in dioxane (0.024 ml.) for 16 hours. The reaction mixture was then concentrated under vacuum to give a white solid, which was diluted in DCM and neutralized with DIEA (0.067 ml_). A BrCN solution (0.146 mmol) was added and the reaction mixture was stirred for 3 hours. A PS-trisamine resin (4 eq, 0.39 mmol, 3.41 mmol/g) was added and the mixture was stirred for 2 hour at room temperature. The resin was filtered off and the filtrate was concentrated under vacuum then purified by preparatory HPLC (without TFA) to afford ((2/?,4/?)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl dimethylcarbamate. (7.5 mg). LC-MS: m/z, 510.9 (M+), rt 1.82 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.20 (d, J=2.26 Hz, 1 H) 7.53 - 7.57 (m, 1 H) 7.49 - 7.53 (m, 1 H) 5.96 (br. s., 1 H) 4.19 - 4.24 (m, 1 H) 4.07 - 4.13 (m, 1 H) 3.80 (dd, J=6.78, 5.52 Hz, 1 H) 3.80 (td, J=10.79, 4.27 Hz, 1 H) 3.45 (dd, J=10.16, 6.40 Hz, 1 H) 3.28 (dd, J=10.16, 5.65 Hz, 1 H) 2.90 (s, 3 H) 2.87 (s, 3 H) 2.20 (ddd, J= 13.30, 7.78, 7.53 Hz, 1 H) 1.65 (ddd, J=13.43, 6.65, 6.53 Hz, 1 H) Example 94 ((2/?,4/?)-1 -Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-pyrrolidinyl)methyl ethyl(methyl)carbamate
Figure imgf000169_0001
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-1-{[(1 ,1-dimethylethyl)oxy]carbonyl}-2- pyrrolidinyl)methyl I H-imidazole-1-carboxylate (420 mg, 0.697 mmol) was diluted in toluene (2 ml.) then methylethylamine (2.09 mmol) was added and the reaction mixture was stirred at room temperature for 2.5 days. The reaction mixture was diluted with DCM and washed twice with brine. The organic layer was separated using a hydrophobic frit and concentrated under vacuum to give 1 ,1-dimethylethyl (2/?,4/?)-4-{[(2,5- dibromophenyl)sulfonyl]amino}-2-[({[ethyl(methyl)amino]carbonyl}oxy)methyl]-1 - pyrrolidinecarboxylate as a crude material (303.2 mg, 75 % purity by LC/MS). This material was treated with 4 N HCI in dioxane (1.7 ml.) at room temperature for 4 hours. The solvent was then removed under vacuum to give a white solid, which was treated with DCM (1 ml.) then DIEA (0.47 ml_). A 1 N BrCN solution (0.76 mmol) in DCM was added and the reaction mixture was stirred for 2 hours. A PS-trisamine resin (4 eq, 2.70 mmol, 3.41 mmol/g) was added and the mixture was stirred for 2 hour. The resin was filtered off and the filtrate was purified by preparatory HPLC (without TFA) to afford the title compound (120.5 mg). LC-MS: m/z, 525.2 (M+H), rt 1.91 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.19 (d, J=2.26 Hz, 1 H) 7.53 - 7.57 (m, 1 H) 7.49 - 7.52 (m, 1 H) 6.00 (br. s., 1 H) 4.18 - 4.25 (m, 1 H) 4.06 - 4.12 (m, 1 H) 3.76 - 3.84 (m, 2 H) 3.46 (dd, J=9.03, 7.28 Hz, 1 H) 3.23 - 3.30 (m, 1 H) 3.29 (d, J=5.77 Hz, 2 H) 2.86 (d, J=8.28 Hz, 3 H) 2.20 (ddd, J=13.87, 7.40, 7.09 Hz, 1 H) 1.64 (ddd, J=13.43, 6.65, 6.53 Hz, 1 H) 1.06 (t, J=7.15 Hz, 3 H)
Example 95 ((2/?,4/?)-1 -Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-pyrrolidinyl)methyl methyl(phenylmethyl)carbamate
Figure imgf000170_0001
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-1-{[(1 ,1-dimethylethyl)oxy]carbonyl}-2- pyrrolidinyl)methyl 1 H-imidazole-1-carboxylate (420 mg, 0.697 mmol) was diluted in toluene (2 ml.) then methyl(phenylmethyl)lamine (2.09 mmol) was added and the reaction mixture was stirred at room temperature for 2.5 days. The reaction mixture was diluted with DCM and washed twice with brine. The organic layer was separated using a hydrophobic frit and concentrated under vacuum to give 1 ,1-dimethylethyl (2/?,4/?)-4- {[(2,5-dibromophenyl)sulfonyl]amino}-2-[({[methyl(phenylmethyl)amino]carbonyl}- oxy)methyl]-1-pyrrolidinecarboxylate as a crude material (445.7 mg, 56 % purity by LC/MS). This material was treated with 4 N HCI in dioxane (1.7 ml.) at room temperature for 4 hours. The solvent was then removed under vacuum to give a white solid, which was treated with DCM (1 mL) then DIEA (0.47 ml_). A 1 N BrCN solution (0.76 mmol) in DCM was added and the reaction mixture was stirred for 2 hours. A PS-trisamine resin (4 eq, 2.70 mmol, 3.41 mmol/g) was added and the mixture was stirred for 2 hour. The resin was filtered off and the filtrate was purified by preparatory HPLC (without TFA) to afford the title compound (194 mg). LC-MS: m/z, 587 (M+H), rt 2.13 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.25 (d, J=4.27 Hz, 1 H) 7.55 - 7.62 (m, 2 H) 7.35 (t, J=7.15 Hz, 2 H) 7.28 - 7.31 (m, 1 H) 7.21 - 7.27 (m, 2 H) 6.30 (br. s., 0.5 H) 5.94 (br. s., 0.5 H) 4.44 - 4.58 (m, 2 H) 4.31 (td, J=10.98, 3.64 Hz, 1 H) 4.17 - 4.24 (m, 1 H) 3.85 - 3.94 (m, 1 H) 3.81 (br. s., 1 H) 3.43 - 3.56 (m, 1 H) 3.35 (dd, J=9.66, 6.40 Hz, 0.5 H) 3.10 - 3.18 (m, 0.5 H) 2.95 (s, 1.5 H) 2.91 (s, 1.5 H) 2.22 - 2.32 (m, 0.5 H) 2.15 (ddd, J=13.36, 7.15, 6.84 Hz, 0.5 H) 1.72 (ddd, J=13.43, 6.90, 6.78 Hz, 0.5 H) 1.54 - 1.64 (m, 0.5 H) Example 96 ((2/?,4/?)-1 -Cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-
2-pyrrolidinyl)methyl diethylcarbamate
Figure imgf000171_0001
((2R,4R)-4-{[(2,5-Dibromophenyl)sulfonyl]amino}-1-{[(1 ,1-dimethylethyl)oxy]carbonyl}-2- pyrrolidinyl)methyl 1 H-imidazole-1-carboxylate (420 mg, 0.697 mmol) was diluted in toluene (2 ml.) then diethylamine (2.09 mmol) was added and the reaction mixture was stirred at room temperature for 2.5 days. The reaction mixture was diluted with DCM and washed twice with brine. The organic layer was separated using a hydrophobic frit and concentrated under vacuum to give 1 , 1 -dimethylethyl (2/?,4/?)-4-{[(2,5- dibromophenyl)sulfonyl]amino}-2-({[(diethylamino)carbonyl]oxy}methyl)-1- pyrrolidinecarboxylate as a crude material (404.5 mg, 72 % purity by LC/MS). This material was treated with 4 N HCI in dioxane (1.7 ml.) at room temperature for 4 hours. The solvent was then removed under vacuum to give a white solid, which was treated with DCM (1 ml.) then DIEA (0.47 ml_). A 1 N BrCN solution (0.76 mmol) in DCM was added and the reaction mixture was stirred for 2 hours. A PS-trisamine resin (4 eq, 2.70 mmol, 3.41 mmol/g) was added and the mixture was stirred for 2 hour. The resin was filtered off and the filtrate was purified by preparatory HPLC (without TFA) to afford the title compound (56.5 mg). LC-MS: m/z, 539.0 (M+H), rt 1.95 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.19 (d, J=2.26 Hz, 1 H) 7.53 - 7.57 (m, 1 H) 7.49 - 7.52 (m, 1 H) 6.07 (d, J=7.03 Hz, 1 H) 4.22 (dd, J=11.54, 4.52 Hz, 1 H) 4.05 - 4.12 (m, 1 H) 3.75 - 3.85 (m, 2 H) 3.47 (dd, J=10.16, 6.65 Hz, 1 H) 3.29 (d, J=6.02 Hz, 1 H) 3.24 (dd, J=14.30, 6.27 Hz, 4 H) 2.15 - 2.23 (m, 1 H) 1.65 (ddd, J=13.49, 7.03, 6.84 Hz, 1 H) 1.07 (t, J=7.15 Hz, 6 H)
Example 97 2,5-Dibromo-Λ/-[(3R,5S)-1 -cyano-δ-methyl-a-pyrrolidinyl]-
/V-2-propen-1-ylbenzenesulfonamide
Figure imgf000172_0001
To a mixture of 1 , 1 -dimethylethyl (2S,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2- methyl-1-pyrrolidinecarboxylate (0.025 g, 0.050 mmol) in acetone (2.0 mL) and DMF (0.7 mL) were added potassium carbonate (0.069 g, 0.502 mmol) and allyl bromide (0.028 mL, 0.251 mmol) to give a yellow solution with a K2CO3suspension. The reaction mixture was allowed to stir overnight. LC/MS showed the reaction was completed. A PS-triamine resin (0.1 18 g, 0.401 mmol, 3.41 mmol/g) was added to trap the excess allylbromide and the resulting mixture was stirred overnight. The resin was filtered off and the filtrate was concentrated to give a crude residue. To the residue previously obtained in DCM (2 mL) was added a 4N HCL aqueous solution (0.502 mL, 2.006 mmol). The reaction mixture was stirred for 2 hours at room temperature. LC/MS showed the reaction was completed. The solvent was evaporated and the residue was dissolved in DCM (2 mL). Triethylamine (0.028 mL, 0.201 mmol) was added and the vial was shaken for 5 minutes then BrCN (0.033 mL, 3N in DCM, 0.1 mmol) was added. The reaction mixture was shaken overnight. LC/MS indicated the reaction was complete. A PS-triamine resin (0.105 g, 0.2 mmol, 2.21 mmol/g) was added and the flask was shaken overnight to neutralize the excess BrCN. The resin was filtered off and the organic filtrate was concentrated to give a crude residue, which was purified by preparatory HPLC (without TFA) to give the title compound (13.7 mg). LC-MS: m/z, 463 (M+H), rt 2.23 min. 1 H NMR (400 MHz, MeOD) δ ppm 8.19 (d, J=2.51 Hz, 1 H) 7.66 - 7.70 (m, 1 H) 7.63 (d, J=2.51 Hz, 1 H) 5.72 (ddd, J=1 1.17, 5.52, 5.40 Hz, 1 H) 5.18 (dd, J=17.07, 1.25 Hz, 1 H) 5.03 (dd, J=10.29, 1.25 Hz, 1 H) 4.54 - 4.61 (m, 1 H) 4.01 (d, J=5.52 Hz, 2 H) 3.54 (dt, J=10.54, 5.90 Hz, 1 H) 3.33 - 3.40 (m, 2 H) 2.08 (dt, J=12.36, 6.24 Hz, 1 H) 1.61 - 1.68 (m, 1 H) 1.25 (d, J=6.27 Hz, 3 H) Example 98 Λ/-(2-Biphenylylmethyl)-2,5-dibromo-Λ/-[(3/?,5S)-1 -cyano-5- methyl-3-pyrrolidinyl]benzenesulfonamide
Figure imgf000173_0001
1 , 1 -Dimethylethyl (2S,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-methyl-1 - pyrrolidinecarboxylate (0.025 g, 0.050 mmol) was placed in a vial with potassium carbonate (0.104 g, 0.753 mmol) and 2-(bromomethyl)biphenyl (0.251 mmol) in acetone (2.0 ml.) and DMF (0.7 ml.) to give a clear solution containing a K2CO3 suspension. The reaction mixture was allowed to stir for 2.5 days. LC/MS sowed the reaction was complete. A PS-triamine resin (0.147 g, 0.501 mmol, 3.41 mmol/g) was added to trap the excess alkyl bromide and the resulting mixture was stirred overnight. The resin was filtered off and the filtrate was concentrated to give a crude residue. To the residue previously obtained in DCM (2 ml.) was added a 4N HCL dioxane solution (0.5 ml_, 2.0 mmol). The reaction mixture was stirred overnight. The solvent was evaporated to give a residue.
The residue previously obtained was taken up in DCM (3 ml.) to which was added DIPEA (0.035 ml_, 0.20 mmol) and the vial was shaken for 10 minutes. Then BrCN (0.033 ml_, 3N in DCM, 0.1 mmol) was added to give a yellow solution. The reaction mixture was stirred for 2.5 days. LC/MS indicated the reaction was complete. A PS-triamine resin (0.059 g, 0.2 mmol, 3.41 mmol/g) was added and the flask was shaken for 2 hours to neutralize the excess BrCN. The resin was removed and the organic filtrate was concentrated to give a crude residue, which was purified by preparatory HPLC (without TFA) to give the title compound (19.41 mg). LC-MS: m/z, 587 (M+), rt 2.635 min. 1 H NMR (500 MHz, DMSOd6) δ ppm 7.68 - 7.74 (m, 2 H) 7.65 (m, 1 H) 7.48 (m, 2 H) 7.38 - 7.44 (m, 1 H) 7.30 - 7.35 (m, 2 H) 7.19 - 7.28 (m, 2 H) 7.15 (s, 2 H) 4.66 - 4.80 (m, 1 H) 4.58 (dd, J=41.63, 16.66 Hz, 2 H) 3.48 - 3.59 (m, 1 H) 3.28 (m, 2 H) 3.02 (t, J=8.82 Hz, 1 H) 1.94 (s, 1 H) 1.31 (q, J=11.01 Hz, 1 H) 1.09 (d, J=6.16 Hz, 3 H). The compounds set out in the Examples shown in Table 1 were prepared according to the general procedure of Example 98, but substituting the appropriate alkyl bromide for the 2- (bromomethyl)biphenyl in Example 98.
Table 1
Figure imgf000174_0001
Figure imgf000175_0001
Figure imgf000176_0001
Figure imgf000177_0001
Figure imgf000178_0001
Figure imgf000179_0001
Figure imgf000180_0001
Figure imgf000181_0001
Figure imgf000182_0002
Example 115 2,5-Dibromo-Λ/-[(3/?,5S)-1-cyano-5-methyl-3-pyrrolidinyl]- /V-cyclobutylbenzenesulfonamide
Figure imgf000182_0001
1 , 1 -Dimethylethyl (2S,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-methyl-1 - pyrrolidinecarboxylate (0.025 g, 0.050 mmol) was placed in a vial with potassium carbonate (0.104 g, 0.753 mmol) and bromocyclobutane (0.251 mmol) in acetone (2.0 ml.) and DMF (0.7 ml.) to give a clear solution containing a K2CO3 suspension. The reaction mixture was allowed to stir for 2.5 days. LC/MS showed the reaction was not complete. Sodium iodide (3 mg) was added and the mixture was heated at 75 0C for another 6 hr and then 120 0C overnight. A PS-triamine resin (0.147 g, 0.501 mmol, 3.41 mmol/g) was added to trap the excess alkyl bromide and the resulting mixture was stirred overnight. The resin was filtered off and the filtrate was concentrated to give a crude residue. To the residue previously obtained in DCM (2 ml.) was added a 4N HCL dioxane solution (0.5 ml_, 2.0 mmol). The reaction mixture was stirred overnight. The solvent was evaporated to give a residue.
The residue previously obtained was taken up in DCM (3 ml_), DIPEA (0.035 ml_, 0.20 mmol) was added and the vial was shaken for 10 minutes. Then BrCN (0.033 ml_, 3N in DCM, 0.1 mmol) was added to give a yellow solution. The reaction mixture was stirred for 2.5 days. LC/MS indicated the reaction was complete. A PS-triamine resin (0.059 g, 0.2 mmol, 3.41 mmol/g) was added and the flask was shaken for 2 hours to neutralize the excess BrCN. The resin was removed and the organic filtrate was concentrated to give a crude residue, which was purified by preparatory HPLC (without TFA) to give the title compound (4.14 mg). LC-MS: m/z, 474.8 (M+), rt 2.28 min; 1 H NMR (500 MHz, DMSO- dβ) δ ppm 7.89 - 7.93 (m, 1 H) 7.56 - 7.62 (m, 2 H) 4.24 - 4.30 (m, 1 H) 3.38 - 3.43 (m, 1 H) 3.28 - 3.30 (m, 2 H) 3.04 - 3.06 (m, 1 H) 1.84 - 1.90 (m, 1 H) 1.52 (dd, J=22.52, 1 1.17 Hz, 1 H) 1.04 (d, J=6.23 Hz, 4 H) 0.68 - 0.74 (m, 1 H) 0.19 - 0.25 (m, 2 H) -0.01 - 0.04 (m, 2 H).
Example 116 Λ/-((3/?,5/?)-5-{[({[3,5-Bis(trifluoromethyl)phenyl]amino}- carbonyl)amino]methyl}-1 -cyano-3-pyrrolidinyl)-2,5- dibromobenzenesulfonamide
Figure imgf000183_0001
To a sample of 1-isocyanato-3,5-bis(trifluoromethyl)benzene 4.26 mg, 0.101 mmol) placed in a 5 mL vial was added 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5- dibromophenyl)sulfonyl]amino}-1-pyrrolidinecarboxylate (0.040 g, 0.078 mmol) in DCM (2.0 ml), giving a pale yellow solution. The reaction mixture was shaken overnight. LC/MS showed that the reaction was completed. A PS-Trisamine resin (0.047 g, 0.156 mmol) was added to trap the excess isocyanate. The mixture was shaken overnight and the PS-reagent was filtered off. The organic filtrate was collected and concentrated to give a crude residue. To the crude residue previously obtained was added a 4N HCI dioxane solution (1.0 ml, 4.00 mmol) to give a pale yellow solution. The mixture was shaken overnight and then concentrated to give a crude mixture. To this mixture was added Et3N (0.043 ml, 0.312 mmol) and DCM (2.0 ml) then the vial was shaken for 10 minutes. BrCN (0.052 ml, 0.156 mmol, 3N in DCM) was added and the mixture was shaken overnight. LC/MS showed the reaction was completed. A PS-Trisamine resin (0.093 g, 0.312 mmol, 3.34 mmol/g) was added to get rid of the excess BrCN. The mixture was concentrated to give a residue that was purified by preparatory HPLC (without TFA) to give the title compound (3.2 mg). LC- MS: m/z, 693 (M+), rt 2.39 min; 1 H NMR (400 MHz, MeOD) δ ppm 8.26 (d, J=2.32 Hz, 1 H) 8.03 (d, J=0.38 Hz, 2 H) 7.72 - 7.76 (m, 1 H) 7.67 - 7.70 (m, 1 H) 7.52 (d, J=0.63 Hz, 1 H) 3.91 - 3.98 (m, 1 H) 3.75 - 3.83 (m, 1 H) 3.65 (s, 2H) 3.56 - 3.60 (m, 2 H) 2.16 - 2.23 (m, 1 H) 1.64 - 1.71 (m, 1 H)
The compounds shown in Table 2 were prepared according to the general procedure of Example 1 16, substituting the relevant isocyanate for the 1-isocyanato-3,5- bis(trifluoromethyl)benzene in Example 116.
Table 2
Figure imgf000184_0001
Figure imgf000185_0001
Figure imgf000186_0001
Example 121 2,5-Dibromo-Λ/-{(3R,5R)-1-cyano-5-[({[(3- cyanophenyl)amino]carbonyl}amino)methyl]-3- pyrrolidinyljbenzenesulfonamide
Figure imgf000186_0002
To a sample of 1-isocyanato-3,5-bis(trifluoromethyl)benzene 4.26 mg, 0.101 mmol) placed in a 5 mL vial was added 1 ,1-dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5- dibromophenyl)sulfonyl]amino}-1-pyrrolidinecarboxylate (0.040 g, 0.078 mmol) in DCM (2.0 ml), giving a pale yellow solution. The reaction mixture was shaken overnight. LC/MS showed that the reaction was partially completed (30% product). The mixture was allowed to heat at 60 0C for 24 hours. LC/MS showed no additional product had formed. A PS-Trisamine resin (0.047 g, 0.156 mmol) was added to trap the excess isocyanate. The mixture was shaken overnight and the PS-reagent was filtered off. The organic filtrate was collected and concentrated to give a crude residue.
To the crude residue previously obtained was added a 4N HCI dioxane solution (1.0 ml, 4.00 mmol) to give a pale yellow solution. The mixture was shaken overnight and then concentrated to give a crude mixture. To this mixture was added Et3N (0.043 ml, 0.312 mmol) and DCM (2.0 ml) then the vial was shaken for 10 minutes. BrCN (0.052 ml, 0.156 mmol, 3N in DCM) was added and the mixture was shaken overnight. LC/MS showed the reaction was completed. A PS-Trisamine resin (0.093 g, 0.312 mmol, 3.34 mmol/g) was added to get rid of the excess BrCN. The mixture was concentrated to give a residue that was purified by preparatory HPLC (without TFA) to give the title compound (1.3 mg). LC- MS: m/z, 583 (M+H), rt 0.95 min. 1 H NMR (400 MHz, MeOD) δ ppm 8.26 (d, J=2.32 Hz, 1 H) 7.91 (ddd, J=1.76, 1.07, 0.94 Hz, 1 H) 7.74 - 7.78 (m, 1 H) 7.66 - 7.71 (m, 1 H) 7.58 (ddd, J=8.30, 2.24, 1.13 Hz, 1 H) 7.44 (dd, J=15.94, 0.44 Hz, 1 H) 7.33 (ddd, J=7.80, 1.30, 1.13 Hz, 1 H) 3.91 - 3.98 (m, 1 H) 3.73 - 3.82 (m, 1 H) 3.68 (s, 2H) 3.50 - 3.54 (m, 2 H) 2.14 - 2.22 (m, 1 H) 1.67 - 1.73 (m, 1 H).
Example 122 2,5-Dibromo-Λ/-{(3R,5R)-1-cyano-5-[({[(4'-fluoro-3- biphenylyl)amino]carbonyl}amino)methyl]-3- pyrrolidinyljbenzenesulfonamide
Figure imgf000187_0001
To a 4 mL vial containing 4'-fluoro-3-biphenylcarboxylic acid (9.00 mg, 0.2 mmol) were added Et3N (0.033 ml, 0.240 mmol), toluene (1.0 ml) and then DPPA (0.051 ml, 0.240 mmol). The mixture was heated at 110 0C for 2 hr. After cooling down, a solution of 1 ,1- dimethylethyl (2R,4R)-2-(aminomethyl)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-1- pyrrolidinecarboxylate (0.041 g, 0.080 mmol) in THF (1.0 ml) was added. The mixture was shaken overnight. LC/MS showed the reaction was completed. A PS-Trisamine resin (0.180 g, 0.600 mmol, 3.34 mmol/g) was added to trap the potential excess isocyanate. The mixture was shaken overnight. The polymer-supported reagent was filtered off, the filtrate was collected, concentrated to give a residue that was purified by preparatory HPLC (without TFA).
To the product previously obtained was added a HCI dioxane solution (1.0 ml, 3.00 mmol) to give a pale yellow solution. The mixture was shaken for 3 hr and then concentrated to give a crude mixture. To this mixture was added Et3N (0.045 ml, 0.320 mmol) and DCM (2.0 ml) then the vial was shaken for 10 minutes. BrCN (0.053 ml, 0.160 mmol, 3N in DCM) was added and the mixture was shaken overnight. A PS-Trisamine resin (0.096 g, 0.320 mmol, 3.34 mmol/g) was added to get rid of the excess BrCN. The mixture was shaken overnight, the resin was removed and the solution was purified by preparatory HPLC (without TFA) to give the title compound (7.48 mg). LC-MS: m/z, 653 (M+), rt 1.92 min. 1 H NMR (400 MHz, MeOD) δ ppm 8.26 (d, J=2.26 Hz, 1 H) 7.60 - 7.72 (m, 5 H) 7.29 - 7.35 (m, 2 H) 7.22 - 7.26 (m, 1 H) 7.18 (t, J=8.78 Hz, 1 H) 7.14 - 7.21 (m, 1 H) 3.93 - 3.99 (m, 1 H) 3.74 - 3.82 (m, 1 H) 3.52 - 3.59 (m, 2 H) 3.38 - 3.42 (m, 2 H) 2.18 (m, 1 H) 1.68 - 1.75 (m, 1 H)
The compounds shown in Table 3 were prepared according to the general procedure of Example 122, substituting the relevant carboxylic acid for the 4'-fluoro-3- biphenylcarboxylic acid in Example 122.
Figure imgf000188_0001
Figure imgf000189_0001
Example 126 2,5-Dibromo-Λ/-((3/?,5/?)-1-cyano-5-{[methyl(4- pyridinylmethyl)amino]methyl}-3- pyrrolidinyl)benzenesulfonamide
Figure imgf000190_0001
To a vial containing N-methyl-1-(4-pyridinyl)methanamine (0.600 mmol) was added 1 ,1- dimethylethyl (2/?,4/?)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-formyl-1-pyrrolidine- carboxylate (0.061 g, 0.12 mmol) in DCM (2.0 ml), methanol (1.0 ml) and 2 drops of acetic acid. The mixture was shaken for 10 minutes before the addition of a PS-(OAc)3BH resin (0.258 g, 0.600 mmol, 2.33 mmol/g). The mixture was shaken overnight. LC-MS indicated the consumption of all the starting material. The PS-reagent was then filtered off and the organic layer was collected, concentrated and the residue was purified by preparatory HPLC (without TFA) to give a secondary amine intermediate.
To the product previously prepared was added a HCI dioxane solution (1.0 ml, 4.00 mmol) to give a pale yellow solution. The mixture was shaken for 3 hr and then concentrated to give a crude mixture. To this mixture was added Et3N (0.084 ml, 0.600 mmol) and DCM (2.0 ml) then the vial was shaken for 10 minutes. BrCN (0.080 ml, 0.240 mmol, 3N in DCM) was added and the mixture was shaken overnight. A PS-Trisamine resin (0.144 g, 0.480 mmol, 3.34 mmol/g) was added to get rid of the excess BrCN. The mixture was shaken overnight, the resin was removed and the solution was purified by preparatory HPLC (without TFA) to give the title compound (8.69 mg). LC-MS: m/z, 544 (M+), rt 1.30min. 1 H NMR (400 MHz, MeOD) δ ppm 8.47 (s, 1 H) 8.44 - 8.51 (m, 1 H) 8.26 (d, J=2.26 Hz, 1 H) 7.74 - 7.78 (m, 1 H) 7.68 - 7.72 (m, 1 H) 7.50 (d, J=6.02 Hz, 2 H) 3.98 (dt, J=8.66, 7.15 Hz, 1 H) 3.80 - 3.87 (m, J=7.65, 7.65, 7.53, 4.77 Hz, 1 H) 3.64 (dd, J=34.63, 14.56 Hz, 2 H) 3.52 (dd, J=9.79, 7.28 Hz, 1 H) 3.27 - 3.29 (m, 1 H) 2.72 (dd, J=13.05, 7.53 Hz, 1 H) 2.56 (dd, J=13.05, 4.77 Hz, 1 H) 2.25 (s, 3 H) 2.13 - 2.21 (m, 1 H) 1.57 - 1.63 (m, 1 H) The compounds shown in Table 4 were prepared according to the general procedure of Example 126, substituting the relevant amine for N-methyl-1-(4-pyridinyl)methanamine.
Table 4
Figure imgf000191_0001
Figure imgf000192_0001
Figure imgf000193_0001
Figure imgf000194_0001
Figure imgf000195_0001
Figure imgf000196_0001
Example 137 2,5-Dibromo-Λ/-[(3/?,5/?)-1-cyano-5-(4-morpholinylmethyl)- 3-pyrrolidinyl]benzenesulfonamide
Figure imgf000196_0002
To a vial containing 1 ,1-dimethylethyl (2/?,4/?)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2- formyl-1-pyrrolidinecarboxylate (0.10 mmol) in DCM (2.0 ml) and methanol (1.0 ml) was added morpholine (0.035 g, 0.40 mmol) and 2 drops of acetic acid. The mixture was shaken for 5 minutes before the addition of a PS-(OAc)3BH resin (0.5 mmol). The mixture was shaken overnight. LC-MS indicated that the composition of the mixture was 45% of the title compound and 55% of an alcohol by-product. The PS-reagent was filtered off and the organic layer was collected, concentrated and the residue was purified by preparatory HPLC (without TFA). All the fractions containing the title compound were collected and concentrated to give a crude material.
To the material previously prepared was added a 4M HCI dioxane solution (1.0 ml, 4.00 mmol). The mixture was shaken overnight. LC/MS indicated that the reaction was completed. The solution was concentrated to give a crude residue which was dissolved in DCM (2 ml_). Then DIPEA (0.070 ml_, 0.4 mmol) was added. The vial was shaken for 10 minutes, then BrCN (0.067 ml, 0.200 mmol, 3N in DCM) was added. The mixture was shaken for 3 hr. Then a PS-Trisamine resin (0.117 g, 0.400 mmol, 3.41 mmol/g) was added to get rid of the excess BrCN. The resin was filtered off and the filtrate was concentrated to give a residue that was purified by preparatory HPLC (without TFA) to give the title compound (5.5 mg). LC-MS: m/z, 508.9 (M+), rt 1.24 min. 1 H NMR (400 MHz, MeOD) δ ppm 8.27 (d, J=2.26 Hz, 1 H) 7.75 - 7.79 (m, 1 H) 7.72 (d, J=2.26 Hz, 1 H) 3.92 (dq, J=6.78, 6.53 Hz, 1 H) 3.82 (t, J=5.65 Hz, 1 H) 3.70 - 3.77 (m, 4 H) 3.51 (dd, J=9.66, 6.65 Hz, 1 H) 3.31 (m, 1 H) 2.57 - 2.60 (m, 6 H) 2.20 - 2.28 (m, 1 H) 1.67 (ddd, J=13.49, 7.03, 6.84 Hz, 1 H)
Example 138 2,5-Dibromo-Λ/-{(3/?,5/?)-1 -cyano-5-[(ethyloxy)methyl]-3- pyrrolidinyljbenzenesulfonamide
Figure imgf000197_0001
A flask was loaded with 1 ,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}- 2-[(ethyloxy)methyl]-1-pyrrolidinecarboxylate (0.144 g, 0.266 mmol) and a 4M HCI dioxane solution (1.328 ml, 5.31 mmol). The mixture was stirred at room temperature for 3 hours, and then concentrated under vacuum to give crude orange oil. A flask was loaded with this material and DIPEA (0.139 mL, 0.798 mmol) in DCM (1.5 mL) to give an orange suspension. The pH was found to be 10.5. BrCN (0.177 ml, 0.532 mmol, 3N in DCM) was added and the resulting mixture was stirred at room temperature for 1.5 hr. A PS- Trisamine resin (0.296 g, 1.064 mmol, 3.6 mmol/g) was then added and the resulting mixture was stirred for another 1.5 hr. The resin was filtered off and the filtrate was concentrated to give a crude residue which was purified by preparatory HPLC (AcCN/ water without TFA) to give the title compound (63.4 mg). LC-MS: m/z, 468 (M+H), rt 1.93 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.18 (1 H, d, J=2.26 Hz) 7.52 - 7.57 (1 H, m) 7.47 (1 H, dd, J=8.53, 2.51 Hz) 7.18 (1 H, d, J=9.29 Hz) 5.24 (1 H, s) 3.82 - 3.90 (1 H, m, J=6.84, 4.45, 4.27, 4.27 Hz) 3.77 (1 H, dq, J=10.20, 2.12 Hz) 3.71 (1 H, dd, J=10.79, 2.26 Hz) 3.56 - 3.67 (2 H, m) 3.42 (1 H, dd, J=10.79, 2.01 Hz) 3.36 (1 H, d, J=4.77 Hz) 3.33 (1 H, d, J=5.02 Hz) 3.23 (1 H, dt) 2.27 (1 H, ddd, J=14.05, 10.29, 7.03 Hz) 1.85 (1 H, dd, J=14.05, 2.01 Hz) 1.28 (3 H, t, J=7.03 Hz)
Example 139 2-Chloro-Λ/-[(3f?,5f?)-1-cyano-5-(1 -methylethyl)-3-pyrrolidinyl]-5-
(trifluoromethyl)benzenesulfonamide
Figure imgf000198_0001
To 1 ,1-dimethylethyl (2R,4R)-4-({[(9H-fluoren-9-ylmethyl)oxy]carbonyl}amino)-2-(1- methylethyl)-1-pyrrolidinecarboxylate (121.5 mg, 0.27 mmol, 1 eq) in DCM (3 mL) is added a MP-trisamine resin (3 eq). After stirring overnight, the polymer is filtered off; the filtrate is recovered and dispensed into a vial containing 2-chloro-5- (trifluoromethyl)benzenesulfonyl chloride (83.7 mg, 0.30 mmol) after which Et3N (0.109 g, 1.080 mmol) is added. The reaction mixture is shaken overnight. After LC/MS indicates the reaction is completed, 1.0 ml of water is added into the reaction mixture which is stirred for another 3 hr. The organic solution is separated using an hydrophobic separator. The organic solvent is evaporated and the residue obtained is dissolved in 1.0 mL of a 4.0M HCI in dioxane. After shaking overnight, the reaction mixture is evaporated to give a crude residue which is dissolved in DCM (2.0 mL). DIPEA (0.187 mL, 1.08 mmol) is added. The reaction mixture is shaken for 3 hr then CNBr (0.180 mL, 0.54 mmol) is added. After the CNBr is added, the mixture is shaken overnight until LC-MS indicates that the reaction is complete. A MP-Triamine resin (150 mg, 0.54mmol) is added and the residue is shaken for 3 hours. After filtration and removal of the solvent, a crude residue is recovered and purified by preparatory HPLC (without TFA) to give the title compound (30 mgs). LC-MS: m/z, 395.9 (M+), rt 2.007 min. The compounds shown in Table 5 can be prepared according to the general procedure of Example 139, substituting 2-chloro-5-(trifluoromethyl)benzenesulfonyl chloride with the relevant sulphonyl chloride.
Table 5
Figure imgf000199_0001
Figure imgf000200_0001
Figure imgf000201_0002
Example 147 2,5-Dichloro-Λ/-[(3/?,5/?)-1-cyano-5-(cyanomethyl)-3- pyrrolidinyljbenzenesulfonamide
Figure imgf000201_0001
To a mixture of 1 ,1-dimethylethyl (2R,4R)-4-amino-2-(cyanomethyl)-1- pyrrolidinecarboxylate (140 mg, 0.621 mmol) and TEA (0.130 ml_, 0.932 mmol) in DCM (10 mL) was added 2,5-dichorobenzenesulfonyl chloride (183 mg, 0.746 mmol) in 3 portions. The mixture was stirred at room temperature for 3h then washed with water (2 mL). The organic layer wa separated then concentrated under vacuum to give a crude material residue (270mg, 0.622 mmol). This material was dissolved in 4M HCI in dioxane (5 ml), and then stirred for 15 hr at room temperature. The solvent was removed under reduced pressure, and the residue was suspended in DCM (5 ml), then DIEA (0.434 ml, 2.487 mmol) is added. A solution of BrCN (0.228 ml, 0.684 mmol, 3N in DCM) was added and the mixture was stirred for 1 h at room temperature then purified by automated flash chromatography to give the title compound (0.63 mg). LC/MS: m/z, 358.8 (M), rt 0.89 min. 1 H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.03 (1 H, d, J=2.26 Hz) 7.43 - 7.50 (1 H, m) 7.46 (1 H, q, J=8.53 Hz) 5.42 (1 H, d, J=7.78 Hz) 3.91 - 3.98 (1 H, m) 3.75 - 3.82 (1 H, m, J=6.09, 4.64, 3.54, 3.54 Hz) 3.51 (1 H, dd, J=10.04, 7.03 Hz) 3.30 (1 H, dd, J=10.16, 7.15 Hz) 2.79 (1 H, dd, J=17.32, 6.02 Hz) 2.69 (1 H, dd, J=17.32, 3.51 Hz) 2.40 (1 H, ddd, J=13.68, 7.03, 6.90 Hz) 1.80 (1 H, dt, J=13.30, 8.41 Hz)
Biological Activity
The compounds according to Formula I are cathepsin C inhibitors, which indirectly inhibit the activity of serine proteases that are activated by cathepsin C, such as NE. The compounds according to Formula I, therefore, are useful in the treatment of COPD and other conditions involving cathepsin C and/or such serine proteases. The biological activity of the compounds according to Formula I can be determined using any suitable assay for determining the activity of a candidate compound as a cathepsin C inhibitor or for determining the ability of a candidate compound to prevent the cathepsin C mediated activation of certain serine proteases, as well as suitable tissue and in vivo models.
A. Transpeptidation of Leucine-Leucine-O-Methyl (LLOM) cell-based Luminescence Viability Assay
Principle:
Cathepsin C has been shown to catalyze the transpeptidation of dipeptidyl methyl- O -esters within the lysosome of cell frm the monocytic lineage like HL60, U937 or THP1 causing a membranolythic effects that results in cell death ( DL. Thiele P. Lipsky PNAS
1990 Vol. 87, pp. 83-87). This phenomenon was used to assess cellular Cathepsin C activity in the presence of our compounds.
Reagents:
• Leucine-Leucine-OMethyl (Bachem, G-2550)
• Iscove's Modified Dulbecco's Medium (IMDM) with L-Glutamine with 25mMolar HEPES buffer (GSK Media Prep Lab)
• Heat Inactivated Fetal Bovine Serum (GSK media prep lab) • HL60 (ATCC, CCL-240) • Dimethyl Sulfoxide (DMSO) (Sigma, D8418)
• 1 M HEPES buffer solution (Gibco, 15630-080)
• CellTiter-Glo Luminescent Cell Viability Assay (Promega, G7572, G7573)
Protocol:
• Pre-warm IMDM with 20% FBS media.
• Count HL60 cells with Hemocytometer.
• Spin cells down at 1200K for 5 min.
• Re-suspend cells at 200K/ml in fresh pre-warmed media. • Dispense 100ul/well of re-suspended cells in sterile black clear bottom polystyrene 96- well plate (Costar #3603).
• Equilibrate cells for 30 min at 37°C, 5% CO2 incubator.
• Add 1 ul of compound diluted at 100X concentrated DMSO. Compounds are 1/3 serial diluted in DMSO from 1 mM to 0.0OuM. Last row is DMSO only. Compounds are assayed in triplicate with final concentration 1OuM to 0.0OuM in wells.
• Incubate plates at 37°C, 5% CO2 incubator for 30 min. Each plate is placed flat on shelf.
• Add to each well 1 ul of 25mM LLOM with 25mM HEPES added in IMDM 20%FBS media to have 25OuM final in wells. LLOM solution is prepared fresh prior to addition. • Include a standard curve of compound GSK1473094A for QC.
• Include a standard curve of LLOM for QC. LLOM is Vz- serial diluted in IMDM with 20%FBS and 0.25mM of HEPES media from 2mM to 31.35uM, Last row is only media.
• Include three rows of cells without LLOM as 100% signal reference.
• Incubate cells for 4 hours at 37°C, 5% CO2 incubator. Each plate is placed flat on shelf.
• Thaw CellTiter-Glo buffer and substrate and equilibrate to room temperature.
• Take the plates out of the incubator and lay flat on bench for 30 min to equilibrate to room temperature.
• Add 10Oul of CellTiter-Glo to each well. • Rock plates for 5 min.
• Read Luminescence (Wallace Envision reader and its software).
• Plot and analyze data (using Graphpad Prism 4).
B. Human Neutrophil Cathepsin C Assay Neutrophil Isolation: Reagents:
• Ficol-Paque Plus (Amersham Biosciences #17-1440-03)
• PBS without calcium and magnesium, room temperature • Dextran T-500 (Pharmacia # 17-0320-01 ) - a 6% (w/v) solution in PBS without calcium and magnesium, stored in 25 ml aliqouts in freezer
• Sterile water
• Trypan blue
• 10X PBS without calcium and magnesium
Protocol:
• At least 30 min. before blood is drawn, place 15 ml. Ficol-Paque Plus into 50 ml. Blue Max tubes.
• Blood is collected, and each 25 ml. of blood is layered over 15 ml. Ficol-Paque Plus and centrifuged at 40Og at room temperature for 30 min. (brake is OFF).
• Discard everything above the red cell fraction.
• Red blood cell (RBC) pellets are resuspended to 35 ml. in PBS w/o. Mix Dextran tubes by inversion, and add 12 ml. to each blood tube. Mix RBC tubes by inversion and allow to stand undisturbed at room temperature for about 40 minutes ( a clearly defined Richleau layer appears).
• The layer above the RBC is collected, adjusted to 50 ml. with PBS w/o, and centrifuged at 800 g at room temperature for 5 min. ( brake can be on).
• The sups are decanted and discarded down to about 3 ml_, then the cells are gently dislodged and resuspended ( in remaining supt). • Lyse the RBC by adding 18 ml. sterile water for 30 seconds at room temperature followed by 2 ml. 10X PBS w/o.
• The cell suspensions are adjusted to 50 ml. with PBS w/o and centrifuged at 800 g for 5 min. at room temperature. Decant and discard sup.
• Resuspend cells in PBS w/o (5 ml. in each tube, pour two tubes together to make 10 ml_). Remove 100 uL from tube of 10 ml_, add it to 800 uL PBS w/o for counting, then bring the tubes up to 50 ml. with PBS w/o. Centrifuge tubes once more at 800 g for 5 min.
• To count cells, add 100 uL Trypan blue to the 900 uL tube. Place 10 uL on Hemacytometer. Count the cells in 5 different fields and average. This number x 106 is your total number of cells. Assay: Reagents:
• PBS: Dulbecco's Phosphorus Buffered Saline without calcium and magnesium • PBS/gelatin: Dulbecco's Phosphorus Buffered Saline without calcium and magnesium with 0.1% gelatin made from a stock of 3% gelatin (Sigma) which is boiled and frozen in aliquots.
• 96-welled v-bottom plates (polypropylene)
• 96-welled flat-bottom tissue culture plates • PMN isolated from human blood
Protocol:
• In a 96-welled v-bottom plate (polypropylene): 2OuL stock compound solution (1 OmM in DMSO) added to wells in top row. DMSO added to alternating rows at 20 and 23uL. Dilutions are made by placing 10 uL to the row below, mixing then repeating serially until reaching the bottom row using a multichannel pipettor.
• Resuspend PMN in PBS/gelatin to a final concentration of 200,000 cells per ml_. Plate in a 96-welled flat-bottom tissue culture plate 10OuL per well, giving a final concentration of 20,000 cells per well. • Add 1 uL of compound per well in triplicate, and mix for 5 min on a plate shaker. Incubate at 37C 5% CO2 for 30min.
• Add 5uL of freshly diluted (H-Gly-Arg)2 R1 10 Substrate (0.5mM in PBS) and mix on a plate shaker for 5 min. Incubate at 37C, 5% CO2 for 3 hrs.
• Read plate using the Analyst HD reader and Criterion Host software Excitation = 485nm, Emmission = 530nm, dichrioc mirror = 505nm.
• Graph data using Graph Pad Prism non-linear regression curve fit analysis.
C. Recombinant Cathepsin C in vitro assay
The activity of recombinant human cathepsin C is measured by the cleavage of a fluorogenic substrate, H-Ser-Tyr-AMC. Briefly, 20 pM cathepsin C is incubated with test compound (e.g. inhibitor) in a buffer consisting of 50 mM sodium acetate, 30 mM sodium chloride, 1 mM CHAPS, 1 mM dithiothreitol, 1 mM EDTA, pH 5.5 at room temperature for one hour. After one hour of incubating test compound with cathepsin C, the activity assay is initiated by the addition of an equal volume of 0.010 mM H-Ser-Tyr-AMC in the same buffer. After one hour, the activity assay is stopped by the addition of 1/10 volume of 10 mM 2-Aldrithiol. The reaction product is measured on a fluorescence reader set at an excitation wavelength of 360 nm and emission wavelength of 460 nm and equipped with a 400 nm dichroic mirror.
Biological Activity Results
All of the compounds exemplified above were tested for activity as cathepsin C inhibitors. Where the assay for a partcular compound had been performed two or more times, the following conclusion regarding their activities is based on the average of individual experiments: All exemplified compounds were found to have a plC50 of 5.0 or greater.
The foregoing examples are being provided to illustrate the invention, not to limit it. Reference is made to the claims for what is reserved to the inventors as being their invention.

Claims

What is claimed is:
1. A compound according to Formula I:
Figure imgf000207_0001
Formula I wherein: each R1 is independently selected from the group consisting of: halo, C1-C4 alkyl, CF3, CN, NO2, -ORa, -OCF3, -C(O)NHRa, -C(O)ORa, -NRaRa, -NHC(O)Ra, or - NHC(O)NHRa; n is an integer from O to 4;
R2a is H, halo, -C(O)Rx, -C(O)ORy, -C(O)NRaRy, -OC(O)Rx, -OC(O)NRaRy, - NRaRy, -NRaC(O)Rx, NRaC(O)R22, -NRaC(O)ORy, -NRaC(O)NRaRy, R20, R21 , R22, R23, R24, -OH, -OR20, -0R21 , -OR22, -OR23, or -OR24; -CN
R2b is H or C1-C4 alkyl; or R2a and R2b taken together with the carbon atom to which they are attached form a C3-C7 cycloalkyl group; R2c is H or C1-C4 alkyl; R20 is C1-C4 alkyl; wherein said R20 is optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF3, CN, NO2, R21 , R22, R23, R24, -ORy, -C(O)Rx, -C(O)ORy, -C(O)NRaRy, -OC(O)Rx, -OC(O)NRaRy, -NRaRy, - NRaC(O)Rx, -NRaC(O)ORy, -NRaC(O)NRaRy; R21 is C3-C6 cycloalkyl; wherein said R21 is optionally substituted with one or more substituents independently selected from the group consisting of: CF3, Rc, -ORa, -OCF3, and -NRaRa; R22 is heterocycloalkyl; wherein said R22 is optionally substituted with one or more substituents independently selected from the group consisting of: CF3, Rc, -ORa, -OCF3, and -NRaRa; R23 is phenyl; wherein said R23 is optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF3, CN, NO2, Rc, -ORa, - OCF3, -C(O)Rb, -C(O)ORa, -C(O)NRaRa, -OC(O)Rb, -OC(O)NRaRa, -NRaRa, - NRaC(O)Rb, -NRaC(O)ORa, -NRaC(O)NRaRa; R24 is monocyclic heteroaryl; wherein said R24 is optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF3, CN, NO2, Rc, -ORa, - OCF3, -C(O)Rb, -C(O)ORa, -C(O)NRaRa, -OC(O)Rb, -OC(O)NRaRa, -NRaRa, - NRaC(O)Rb, -NRaC(O)ORa, -NRaC(O)NRaRa; R3 is H, R30, or R31 ;
R30 is C1-C4 alkyl, C2-C4 alkenyl, or C2-C4 alkynyl; wherein said R30 is optionally substituted with one or more substituents independently selected from the group consisting of: CF3, Re, Rf, Rg, -ORa, CN, -OCF3, - ORf, -ORg, -0R31 , and -NRaRa; R31 is C3-C6 cycloalkyl; wherein said R31 is optionally substituted with one or more substituents independently selected from the group consisting of: Rb, -ORa, -OCF3, and -NRaRa; each Ra is independently H or C1-C4 alkyl; each Rb is independently C1-C4 alkyl; each Rc is independently C1-C4 alkyl; wherein said C1-C4 alkyl is optionally substituted with one or more substituents independently selected from the group consisting of: CF3, -ORa, OCF3, and -NRaRa; each Rd is independently C1-C4 alkyl; wherein said C1-C4 alkyl is optionally substituted with one or more substituents independently selected from the group consisting of: CF3, -ORa, OCF3, -NRaRa, Re, and Rf; each Re is independently phenyl or heteroaryl optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF3, Rb, R23, R24, -ORa, OCF3, and -NRaRa; each Rf is independently monocyclic heteroaryl optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF3, Rb, R23, R24, -ORa, OCF3, and -NRaRa; each Rg is independently napthyl optionally substituted with one or more substituents independently selected from the group consisting of: halo, CF3, Rb, -ORa, OCF3, and -NRaRa; each Rh is independently C3-C6 cycloalkyl optionally substituted with one or more substituents independently selected from the group consisting of: Rb, -ORa, -OCF3, and - NRaRa; each Rx is Rd, Re, Rf, Rg, or Rh; and each Ry is H, Rd, Re, Rf, Rg, or Rh; or a salt thereof.
2. A compound or salt of Formula I according to claim 1 wherein R2a is H.
3. A compound or salt of Formula I according to claim 1 wherein R2a is halo.
4. A compound or salt of Formula I according to claim 1 wherein R2a is -C(O)Rx, - C(O)ORy, or -C(O)NRaRy.
5. A compound or salt of Formula I according to claim 1 wherein R2a is -OC(O)Rx or -OC(O)NRaRy.
6. A compound or salt of Formula I according to claim 1 wherein R2a is -OC(O)Rx.
7. A compound or salt of Formula I according to claim 6 wherein Rx is Rd.
8. A compound or salt of Formula I according to Claim 1 wherein R2a is - OC(O)NRaRy.
9. A compound or salt of Formula I according to claim 8 wherein Ry is phenyl optionally substituted with one or more substituents independently selected from the group consisting of: CF3, Rb, and -ORa.
10. A compound or salt of Formula I according to claim 9 wherein Ra is H or C1- C4alkyl.
11. A compound or salt of Formula I according to claim 1 wherein R2a is -NRaRy, - NRaC(O)Rx, -NRaC(O)ORy, Or -NRaC(O)NRaRy.
12. A compound or salt of Formula I according to claim 1 wherein R2a is -NRaC(O)Rx.
13. A compound or salt of Formula I according to claim 12 wherein Ra is H.
14. A compound or salt of Formula I according to claim 1 wherein R2a is - NRaC(O)NRaRy.
15. A compound or salt of Formula I according to claim 14 wherein each Ra is H.
16. A compound or salt of Formula I according to claim 1 wherein R2a is R20, R21 , R22, R23, or R24.
17. A compound or salt of Formula I according to claim 1 wherein R2a is R20.
18. A compound or salt of Formula I according to claim 1 wherein R2a is -OH, -OR20, -OR21 , -OR22, -OR23, or -OR24.
19. A compound or salt of Formula I according to claim 1 wherein R2a is -OR20.
20. A compound or salt of Formula I according to Claim 1 wherein R2a is -OR23.
21. A compound or salt of Formula I according to any of the preceeding claims wherein each R1 is independently selected from the group consisting of: halo, C1-C4 alkyl, CF3, CN, NO2, -ORa, and -OCF3.
22. A compound or salt of Formula I according to any of the preceeding claims wherein n is 0.
23. A compound or salt of Formula I according to any of the preceeding claims wherein n is 1.
24. A compound or salt of Formula I according to any of the preceeding claims wherein n is 2.
25. A compound or salt of Formula I according to any of the preceeding claims wherein n is 3.
26. A compound or salt of Formula I according to any of the preceeding claims wherein n is 4.
27. A compound or salt of Formula I according to any of the preceeding claims wherein R2b is H.
28. A compound or salt of Formula I according to any of the preceeding claims wherein R2c is H.
29. A compound or salt of Formula I according to any of the preceeding claims wherein R3 is H.
30. A compound according to claim 1 which is:
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]benzenesulfonamide; 2,5-dichloro-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]benzenesulfonamide
N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-2,5- bis(methyloxy)benzenesulfonamide
3-bromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]benzenesulfonamide
2-bromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-5- (trifluoromethyl)benzenesulfonamide
2-chloro-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-5- (trifluoromethyl)benzenesulfonamide
5-bromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-2- (methyloxy)benzenesulfonamide 5-bromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-2,4- ifluorobenzenesulfonamide
N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-2,3,5-trifluorobenzenesulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[(methyloxy)methyl]-3- pyrrolidinyl}benzenesulfonamide 2,5-dichloro-N-{(3R,5R)-1-cyano-5-[(methyloxy)methyl]-3- pyrrolidinyl}benzenesulfonamide
2-bromo-N-{(3R,5R)-1-cyano-5-[(methyloxy)methyl]-3-pyrrolidinyl}-5- (trifluoromethyl)benzenesulfonamide
2,5-dichloro-N-{(3R,5R)-1-cyano-5-[(phenyloxy)methyl]-3- pyrrolidinyl}benzenesulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[(phenyloxy)methyl]-3- pyrrolidinyl}benzenesulfonamide
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-2,2- dimethylpropanoate
((2R,4R)-1-cyano-4-{[(2,5-dichlorophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-2,2- dimethylpropanoate
[(2R,4R)-4-({[5-chloro-2-(methyloxy)phenyl]sulfonyl}amino)-1-cyano-2- pyrrolidinyl]methyl 2,2-dimethylpropanoate 2-bromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-5-nitrobenzenesulfonamide
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl phenylcarbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl (phenylmethyl)carbamate ((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-{[2-
(methyloxy)phenyl]methyl}carbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl {[3- (methyloxy)phenyl]methyl}carbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-{[4- (methyloxy)phenyl]methyl}carbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-[2- (methyloxy)phenyl]carbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-[3- (methyloxy)phenyl]carbamate ((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-[4-
(methyloxy)phenyl]carbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-[3- (trifluoromethyl)phenyl]carbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-[4- (trifluoromethyl)phenyl]carbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-(2- methylphenyl)carbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-(3- methylphenyl)carbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-1- naphthalenylcarbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl-2- naphthalenylcarbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl ethylcarbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl(1 ,1- dimethylethyl)carbamate ((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl[2-
(trifluoromethyl)phenyl]carbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl cyclohexylcarbamate
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]- 3,6- difluorobenzenesulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[(1 ,3-dioxo-1 ,3-dihydro-2H-isoindol-2- yl)methyl]-3-pyrrolidinyl}benzenesulfonamide
N-[((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2- pyrrolidinyl)methyl]benzamide N-[((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl]-
2,2-dimethylpropanamide
N-[((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl]- 2-phenylacetamide
N-[((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl]- 3-methylbenzamide
N-[((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl]- 2-(methyloxy)benzamide
N-[((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2- pyrrolidinyl)methyl]cyclohexanecarboxamide N-[((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl]-
2-thiophenecarboxamide
2,5-dibromo-N-[(3R,5R)-1-cyano-5-({[(phenylamino)carbonyl]amino}methyl)-3- pyrrolidinyl]benzenesulfonamide 5-chloro-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-2- (methyloxy)benzenesulfonamide
N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-2,5-dimethylbenzenesulfonamide
N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-3-(trifluoromethyl)benzene- sulfonamide-2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-4- fluorobenzenesulfonamide
N-[((2R,4R)-1-cyano-4-{[(2,5-dichlorophenyl)sulfonyl] amino}-2- pyrrolidinyl)methyl]benzamide
N-[((2R,4R)-1-cyano-4-{[(2,5-dichlorophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl]- 3-methylbenzamide
N-[((2R,4R)-1-cyano-4-{[(2,5-dichlorophenyl)sulfonyl] amino}-2-pyrrolidinyl)methyl]- 2,2-dimethylpropanamide
N-[((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl] amino}-2- pyrrolidinyl)methyl]-3-fluorobenzamide N-[((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl] amino}-2- pyrrolidinyl)methyl]-4-fluorobenzamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[({[2-(methyloxy)phenyl) amino]carbonyl}amino)methyl]-3-pyrrolidinyl}benzene sulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[({[3-(methyloxy)phenyl) amino]carbonyl}amino)methyl]-3-pyrrolidinyl}benzene sulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[({[4-(methyloxy)phenyl) amino]carbonyl}amino)methyl]-3-pyrrolidinyl}benzene sulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[({[2-(trifluoromethyl) phenyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl)benzene sulfonamide 2,5-dibromo-N-((3R,5R)-1-cyano-5-{[({[3-(trifluoromethyl) phenyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl)benzene sulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[({4-(trifluoromethyl) phenyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl)benzene sulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[({[(3-fluorophenyl) amino]carbonyl}amino)methyl]-3-pyrrolidinyl}benzene sulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[({[(2-methylphenyl)amino] carbonyl}amino)methyl]-3-pyrrolidinyl}benzenesulfonamide 2,5-dibromo-N-{(3R,5R)-1-cyano-5-[({[(3-methylphenyl)amino] carbonyl}amino)methyl]-3-pyrrolidinyl}benzenesulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[({[(phenylmethyl)amino] carbonyl}amino)methyl]-3-pyrrolidinyl}benzenesulfonamide 2,5-dibromo-N-[(3R,5R)-1 -cyano-5-({[({[2-(methyloxy)phenyl] methyl}amino)carbonyl]amino}methyl)-3-pyrrolidinyl]benzene sulfonamide
2,5-dibromo-N-[(3R,5R)-1-cyano-5-({[({[3-(methyloxy)phenyl] methyl}amino)carbonyl]amino}methyl)-3-pyrrolidinyl]benzene sulfonamide
2,5-dibromo-N-[(3R,5R)-1-cyano-5-({[({[4-(methyloxy)phenyl] methyl}amino)carbonyl]amino}methyl)-3-pyrrolidinyl]benzene sulfonamide
2,5-dibromo-N-[(3R,5R)-1-cyano-5-({[(cyclohexylamino) carbonyl]amino}methyl)-3- pyrrolidinyl]benzenesulfonamide
2,5-dibromo-N-[(3R,5R)-1-cyano-5-({[4-(methyloxy)phenyl]oxy} methyl)-3- pyrrolidinyl]benzenesulfonamide 2,5-dichloro-N-[(3R,5R)-1 -cyano-5-({[4-(methyloxy)phenyl]oxy} methyl)-3- pyrrolidinyl]benzenesulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[(4-fluorophenyl)oxy]methyl}-3- pyrrolidinyl)benzenesulfonamide
2,5-dichloro-N-((3R,5R)-1-cyano-5-{[(4-fluorophenyl)oxy]methyl}-3- pyrrolidinyl)benzenesulfonamide
2-bromo-5-chloro-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-4- fluorobenzenesulfonamide
2,5-dichloro-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-4- fluorobenzenesulfonamide 2-bromo-5-chloro-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-4- fluorobenzenesulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[(dipropylamino) methyl]-3- pyrrolidinyl}benzenesulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[(phenylmethyl)oxy] methyl}-3- pyrrolidinyl)benzenesulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[(phenylmethyl)oxy] methyl}-3- pyrrolidinyl)benzenesulfonamide N-{[(2R,4R)-4-({[5-chloro-2-(methyloxy)phenyl]sulfonyl}amino)-1-cyano-2- pyrrolidinyl]methyl}-2,2-dimethylpropanamide
N-{[(2R,4R)-4-({[5-bromo-2-(methyloxy)phenyl]sulfonyl}amino)-1-cyano-2- pyrrolidinyl]methyl}-2,2-dimethylpropanamide N-{[(2R,4R)-4-({[2,5-bis(methyloxy)phenyl]sulfonyl}amino)-1-cyano-2- pyrrolidinyl]methyl}-2,2-dimethylpropanamide
N-({(2R,4R)-4-[{[5-bromo-2-(methyloxy)phenyl]sulfonyl}(phenylmethyl)amino]-1- cyano-2-pyrrolidinyl}methyl)-2,2-dimethylpropanamide
N-({(2R,4R)-4-[{[2,5-bis(methyloxy)phenyl]sulfonyl}(phenylmethyl)amino]-1-cyano- 2-pyrrolidinyl}methyl)-2,2-dimethylpropanamide
2,5-dichloro-N-((3R,5R)-1-cyano-5-{[({[2-(methyloxy)ethyl]amino}carbonyl)- amino]methyl}-3-pyrrolidinyl)benzenesulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[({[2-(methyloxy) ethyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl) benzenesulfonamide N-[((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl]-
4-morpholinecarboxamide
5-chloro-N-((3R,5R)-1-cyano-5-{[({[2-(methyloxy)ethyl]amino}carbonyl)- amino]methyl}-3-pyrrolidinyl)-2-(methyloxy)benzenesulfonamide
N-{[(2R,4R)-4-({[5-chloro-2-(methyloxy)phenyl]sulfonyl} amino)-1-cyano-2- pyrrolidinyl]methyl}-4-morpholinecarboxamide
N-((3R,5R)-5-{[(aminocarbonyl)amino]methyl}-1-cyano-3-pyrrolidinyl)-5-chloro-2- (methyloxy)benzenesulfonamide
N-((3R,5R)-1-cyano-5-{[({[2-(methyloxy)ethyl]amino} carbonyl)amino]methyl}-3- pyrrolidinyl)-2,5-bis(methyloxy)benzenesulfonamide N-((3R,5R)-5-{[(aminocarbonyl)amino]methyl}-1-cyano-3-pyrrolidinyl)-2,5- bis(methyloxy)benzenesulfonamide
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl dimethylcarbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl ethyl(methyl)carbamate
((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl methyl(phenylmethyl)carbamate ((2R,4R)-1-cyano-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-pyrrolidinyl)methyl diethylcarbamate
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-2-propen-1- ylbenzenesulfonamide N-(2-biphenylylmethyl)-2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3- pyrrolidinyl]benzenesulfonamide
N-{[2,5-bis(trifluoromethyl)phenyl]methyl}-2,5-dibromo-N-[(3R,5S)-1-cyano-5- methyl-3-pyrrolidinyl]benzenesulfonamide
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-[2- (methyloxy)ethyl]benzenesulfonamide
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-(2-{[2- (methyloxy)ethyl]oxy}ethyl)benzenesulfonamide
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-(3- phenylpropyl)benzenesulfonamide 2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-(3- methylbutyl)benzenesulfonamide
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N- ethylbenzenesulfonamide
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-(4- fluorobutyl)benzenesulfonamide
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N- (cyclobutylmethyl)benzenesulfonamide
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-(2- cyclohexylethyl)benzenesulfonamide 2,5-dibromo-N-(cyanomethyl)-N-[(3R,5S)-1-cyano-5-methyl-3- pyrrolidinyl]benzenesulfonamide
2,5-dibromo-N-(4-cyanobutyl)-N-[(3R,5S)-1-cyano-5-methyl-3- pyrrolidinyl]benzenesulfonamide
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-2-propyn-1- ylbenzenesulfonamide
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-[(4- methylphenyl)methyl]benzenesulfonamide 2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-[(2- nitrophenyl)methyl]benzenesulfonamide
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-[(2,5- difluorophenyl)methyl]benzenesulfonamide 2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N-[(5-methyl-2-phenyl-
2H-1 ,2,3-triazol-4-yl)methyl]benzenesulfonamide
2,5-dibromo-N-[(3R,5S)-1-cyano-5-methyl-3-pyrrolidinyl]-N- cyclobutylbenzenesulfonamide
N-((3R,5R)-5-{[({[3,5-Bis(trifluoromethyl)phenyl]amino}-carbonyl)amino]methyl}-1- cyano-3-pyrrolidinyl)-2,5-dibromobenzenesulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[({[(1 ,1- dimethylethyl)amino]carbonyl}amino)methyl]-3-pyrrolidinyl}benzenesulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[({[(2-fluorophenyl)methyl]amino}- carbonyl)amino]methyl}-3-pyrrolidinyl)benzenesulfonamide 2,5-dibromo-N-{(3R,5R)-5-[({[(3-bromophenyl)amino]carbonyl}amino)methyl]-1- cyano-3-pyrrolidinyl}benzenesulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[({[(4-fluorophenyl)methyl]amino}carbonyl)- amino]methyl}-3-pyrrolidinyl)benzenesulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[({[(3-cyanophenyl)amino]carbonyl}- amino)methyl]-3-pyrrolidinyl}benzenesulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[({[(4'-fluoro-3-biphenylyl)amino]- carbonyl}amino)methyl]-3-pyrrolidinyl}benzenesulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[({[3-(2-methyl-1 ,3-thiazol-4- yl)phenyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl)benzenesulfonamide 2,5-dibromo-N-((3R,5R)-1-cyano-5-{[({[3-(1 H-pyrazol-1- yl)phenyl]amino}carbonyl)amino]methyl}-3-pyrrolidinyl)benzenesulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[({[(3,5-dimethylphenyl)amino]carbonyl}- amino)methyl]-3-pyrrolidinyl}benzenesulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[methyl(4-pyridinylmethyl)amino]methyl}-3- pyrrolidinyl)benzenesulfonamide
N-((3R,5R)-5-{[(1 ,3-benzothiazol-2-ylmethyl)(methyl)amino]methyl}-1-cyano-3- pyrrolidinyl)-2,5-dibromobenzenesulfonamide 2,5-dibromo-N-[(3R,5R)-1-cyano-5-({methyl[2-(phenyloxy)ethyl]amino}methyl)-3- pyrrolidinyl]benzenesulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[methyl(tetrahydro-2H-pyran-4- ylmethyl)amino]methyl}-3-pyrrolidinyl)benzenesulfonamide 2,5-dibromo-N-[(3R,5R)-1-cyano-5-({4-[(methyloxy)methyl]-1-piperidinyl}methyl)-3- pyrrolidinyl]benzenesulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[2-(2-methylpropyl)-1-pyrrolidinyl]methyl}-3- pyrrolidinyl)benzenesulfonamide
2,5-dibromo-N-[(3R,5R)-1-cyano-5-({(2S)-2-[(methyloxy)methyl]-1- pyrrolidinyl}methyl)-3-pyrrolidinyl]benzenesulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[(dimethylamino)methyl]-3- pyrrolidinyl}benzenesulfonamide
2,5-dibromo-N-[(3R,5R)-1 -cyano-5-(1 -pyrrolidinylmethyl)-3- pyrrolidinyl]benzenesulfonamide 2,5-dibromo-N-((3R,5R)-1-cyano-5-{[methyl(2-propyn-1-yl)amino]methyl}-3- pyrrolidinyl)benzenesulfonamide
2,5-dibromo-N-((3R,5R)-1-cyano-5-{[methyl(phenylmethyl)amino]methyl}-3- pyrrolidinyl)benzenesulfonamide
2,5-dibromo-N-[(3R,5R)-1-cyano-5-(4-morpholinylmethyl)-3- pyrrolidinyl]benzenesulfonamide
2,5-dibromo-N-{(3R,5R)-1-cyano-5-[(ethyloxy)methyl]-3- pyrrolidinyl}benzenesulfonamide
2-chloro-N-[(3R,5R)-1-cyano-5-(1-methylethyl)-3-pyrrolidinyl]-5- (trifluoromethyl)benzenesulfonamide N-[(3R,5R)-1-cyano-5-(1-methylethyl)-3-pyrrolidinyl]-2,5- bis(trifluoromethyl)benzenesulfonamide
2,5-dichloro-N-[(3R,5R)-1 -cyano-5-(1 -methylethyl)-3- pyrrolidinyl]benzenesulfonamide
2-bromo-N-[(3R,5R)-1-cyano-5-(1-methylethyl)-3-pyrrolidinyl]-benzenesulfonamide 5-bromo-N-[(3R,5R)-1-cyano-5-(1-methylethyl)-3-pyrrolidinyl]-2-
(methyloxy)benzenesulfonamide
2,5-dibromo-N-[(3R,5R)-1-cyano-5-(1-methylethyl)-3-pyrrolidinyl]- benzenesulfonamide 2-bromo-N-[(3R,5R)-1-cyano-5-(1-methylethyl)-3-pyrrolidinyl]-5- (trifluoromethyl)benzenesulfonamide
5-chloro-N-[(3R,5R)-1-cyano-5-(1-methylethyl)-3-pyrrolidinyl]-2- (methyloxy)benzenesulfonamide 2,5-dichloro-N-[(3R,5R)-1-cyano-5-(cyanomethyl)-3-pyrrolidinyl]- benzenesulfonamide or a salt thereof.
31. A pharmaceutical composition comprising a compound or pharmaceutically acceptable salt of Formula I according to any of the preceeding claims and one or more pharmaceutically-acceptable excipient.
32. A method for treating COPD comprising administering an effective amount of a compound or pharmaceutically acceptable salt of Formula I according to any of the preceeding claims to a patient in need thereof.
PCT/US2008/073425 2007-08-20 2008-08-18 Novel cathepsin c inhibitors and their use WO2009026197A1 (en)

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WO2015150555A1 (en) 2014-04-03 2015-10-08 Janssen Pharmaceutica Nv Macrocylic pyrimidine derivatives
US11091488B2 (en) 2015-11-30 2021-08-17 Mission Therapeutics Limited 1-cyano-pyrrolidine derivatives as inhibitors of USP30
US10654853B2 (en) 2016-03-04 2020-05-19 Mission Therapeutics Limited Spiro-condensed pyrrolidine derivatives as deubiquitylating enzymes (DUB) inhibitors
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RU2730552C2 (en) * 2016-03-04 2020-08-24 Мишн Терапьютикс Лимитед Spiro condensed pyrrolidine derivatives as inhibitors of deubiquitinating enzymes (dub)
KR20180119644A (en) * 2016-03-04 2018-11-02 미션 테라퓨틱스 엘티디 A spiro-condensed pyrrolidine derivative as a deubiquitinating enzyme (DUB) inhibitor
US10927110B2 (en) 2016-09-29 2021-02-23 Mission Therapeutics Limited Cyano-subtituted heterocycles with activity as inhibitors of USP30
WO2018108627A1 (en) 2016-12-12 2018-06-21 Bayer Cropscience Aktiengesellschaft Use of substituted indolinylmethyl sulfonamides, or the salts thereof for increasing the stress tolerance of plants
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JP7221217B2 (en) 2017-05-31 2023-02-13 ミッション セラピューティクス リミティド Sulfonamide-substituted cyanopyrrolidines with activity as DUB inhibitors
JP2020521730A (en) * 2017-05-31 2020-07-27 ミッション セラピューティクス リミティド Sulfonamide substituted cyanopyrrolidine having activity as DUB inhibitor
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US20090264431A1 (en) 2009-10-22
TW200922556A (en) 2009-06-01

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