WO2012100732A1 - Retinoid-related orphan receptor gamma modulators, composition containing them and uses thereof - Google Patents

Retinoid-related orphan receptor gamma modulators, composition containing them and uses thereof Download PDF

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Publication number
WO2012100732A1
WO2012100732A1 PCT/CN2012/070676 CN2012070676W WO2012100732A1 WO 2012100732 A1 WO2012100732 A1 WO 2012100732A1 CN 2012070676 W CN2012070676 W CN 2012070676W WO 2012100732 A1 WO2012100732 A1 WO 2012100732A1
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phenyl
solution
acetamide
compound
ethylsulfonyl
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PCT/CN2012/070676
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French (fr)
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Yonghui Wang
Ting Yang
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Glaxo Group Limited
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D333/00—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom
    • C07D333/02—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings
    • C07D333/04—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom
    • C07D333/26—Heterocyclic compounds containing five-membered rings having one sulfur atom as the only ring hetero atom not condensed with other rings not substituted on the ring sulphur atom 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
    • C07D333/30—Hetero atoms other than halogen
    • C07D333/36—Nitrogen atoms
    • 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]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • A61P37/02—Immunomodulators

Definitions

  • the present invention relates to novel retinoid-related orphan receptor gamma (RORy) modulators and their use in the treatment of diseases mediated by RORy.
  • RORy retinoid-related orphan receptor gamma
  • RORs Retinoid-related orphan receptors
  • the ROR family consists of three members, ROR alpha (RORa), ROR beta (RORp) and ROR gamma (RORy), each encoded by a separate gene (RORA, RORB and RORC, respectively).
  • RORs contain four principal domains shared by the majority of nuclear receptors: an N-terminal A/B domain, a DNA-binding domain, a hinge domain, and a ligand binding domain. Each ROR gene generates several isoforms which differ only in their N-terminal A B domain. Two isoforms of RORy have been identified: RORyl and RORyt (also known as RORy2).
  • RORy is a term used to describe both RORyl and/or RORyt.
  • Thl7 cells are a subset of T helper cells which produce IL- 17 and other proinflammatory cytokines. Thl7 cells have been shown to have key functions in several mouse autoimmune disease models including experimental autoimmune encephalomyelitis (EAE) and collagen-induced arthritis (CIA).
  • EAE experimental autoimmune encephalomyelitis
  • CIA collagen-induced arthritis
  • Thl7 cells or their products have been shown to be associated with the pathology of a variety of human inflammatory and autoimmune disorders including multiple sclerosis, rheumatoid arthritis, psoriasis, Crohn's disease and asthma (Jetten (2009) Nucl. Recept. Signal. 7: e003; Manel et al. (2008) Nat. Immunol. 9:641-649).
  • the pathogenesis of chronic autoimmune diseases including multiple sclerosis and rheumatoid arthritis arises from the break in tolerance towards self-antigens and the development of auto-aggressive effector T cells infiltrating the target tissues.
  • Thl7 cells are one of the important drivers of the inflammatory process in tissue-specific autoimmunity (Steinman (2008) J. Exp. Med. 205: 1517- 1522; Leung et al. (2010) Cell. Mol. Immunol. 7: 182-189). There is evidence that Thl7 cells are activated during the disease process and are responsible for recruiting other inflammatory cells types, especially neutrophils, to mediate pathology in the target tissues (Korn et al. (2009) Annu. Rev.
  • RORyt plays a critical role in the pathogenic responses of Thl7 cells (Ivanov et al. (2006) Cell 126: 1121 -1 133). RORyt deficient mice show very little Thl7 cells. In addition, RORyt deficiency resulted in amelioration of EAE. Further support for the role of ROR/yt in the pathogensis of autoimmune or inflammatory diseases can be found in the following references: Jetten & Joo (2006) Adv.Dev.Biol. 16:313-355; Meier et al. (2007) Immunity 26:643-654; Aloisi & Pujol-Borrell (2006) Nat. Rev. Immunol. 6:205-217; Jager et al. (2009) J. Immunol. 183:7169-7177; Serafini et al. (2004) Brain _3 ⁇ 4/ ⁇ /.14: 164-174; Magliozzi et al. (2007) Brain 130: 1089-1104; Barnes (2008)
  • the invention is directed to novel RORy modulators and their use in the treatment of diseases mediated by RORy. Specifically, the invention is directed to compounds according to Formula I.
  • Rl, R2, R3, R4, R5, m and n are defined below, and to pharmaceutically-acceptable salts thereof.
  • this invention provides for the use of the compounds of Formula I for the treatment of diseases mediated by RORy.
  • diseases include autoimmune or inflammatory diseases such as multiple sclerosis, rheumatoid arthritis, psoriasis, Crohn's disease and asthma.
  • the invention is directed to methods of treating such diseases.
  • Alkyl refers to a monovalent saturated hydrocarbon chain having the specified number of member atoms.
  • C1-C6 alkyl refers to an alkyl group having from 1 to 6 member atoms.
  • Alkyl groups may be optionally substituted with one or more substituent 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.
  • Alkoxy refers to the group -O-R where R is alkyl having the specified number of member atoms. Alkoxy includes methoxy, ethoxy and propoxy.
  • Enantiomerically enriched refers to products whose enantiomeric excess is greater than zero.
  • 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 refers to the time required for half of a quantity of a substance to be converted to another chemically distinct species in vitro or in vivo.
  • Halo refers to the halogen radicals fluoro, chloro, bromo, and iodo.
  • Heteroatom refers to a nitrogen, sulphur, or oxygen atom.
  • Member atoms refers to the atom or atoms that form a chain or ring. Where more than one member atom is present in a chain and within a ring, each member atom is covalently bound to an adj cent member atom in the chain or ring. Atoms that make up a substituent group on a chain or ring are not member atoms in the chain or ring.
  • Optionally substituted indicates that a group, such as alkyl, alkenyl, alkynyl, aryl, cycloalkyl, cycloalkenyl, heterocycloalkyl, or heteroaryl, may be unsubstituted, or the group may be substituted with one or more substituent as defined.
  • RORy refers to all isoforms encoded by the RORC gene which include RORyl and RORyt.
  • RORy modulator refers to a chemical compound that inhibits, either directly or indirectly, the activity of RORy.
  • RORy modulators include antagonists and inverse agonists of RORy.
  • “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.
  • Substituted in reference to a group indicates that one or more hydrogen atom attached to a member atom within the group is replaced with a substituent selected from the group of defined substituents. 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 and that is sufficiently robust to survive isolation from a reaction mixture). When it is stated that a group may contain one or more substituent, one or more (as appropriate) member atom within the group may be substituted. In addition, a single member atom within the group 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.
  • the present invention provides, in a first aspect, a compound of Formula I or a
  • each Rl is selected from the group consisting of:
  • each R2 is selected from the group consisting of:
  • n 0, 1 or 2.
  • n 0, 1 or 2.
  • R3 is H or Cl-C3 alkyl
  • R4 is H or Cl-C3 alkyl
  • R5 is selected from the group consisting of:
  • Ra is C1-C6 alkyl
  • the invention relates to the compounds of Formula I, wherein m is 0. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein m is 1.
  • this invention also relates to compounds of any of the above embodiments, wherein Rl is CI. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein Rl is F. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein Rl is CF 3 . In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein Rl is CN.
  • this invention also relates to compounds of any of the above embodiments, wherein n is 0. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein n is 1. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein n is 2,
  • this invention also relates to compounds of any of the above embodiments, wherein R2 is CI. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R2 is F. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R2 is methoxy. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R2 is methyl. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R2 is CF3. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R2 is (trifluoromethyl)oxy. fn one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R3 is H. fn one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R3 is CH 3 .
  • this invention also relates to compounds of any of the above embodiments, wherein R4 is H. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R4 is C3 ⁇ 4.
  • this invention also relates to compounds of any of the above embodiments, wherein R5 is C1 -C3 alkyl. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R5 is ethyl. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R5 is methyl.
  • the compounds according to Formula I may contain one or more asymmetric center (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 such as chiral carbon atoms, may also be present in a substituent such as an alkyl group.
  • 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 all individual stereoisomers and all mixtures thereof.
  • 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 metliods 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.
  • 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. Likewise, all tautomeric forms are also included in Formula I whether such tautomers exist in equilibrium or predominately in one form.
  • compounds according to Formula I may contain an acidic functional group. In certain other embodiments, compounds according to Formula I may contain a basic functional group.
  • 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 may impart greater stability or solubility to the molecule thereby facilitating formulation into a dosage form. Accordingly, the invention is further directed to the use of pharmaceutically-acceptable salts of the compounds according to Formula I.
  • 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.
  • 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.
  • the invention also includes various deuterated forms of the compounds of Formula (I). Each available hydrogen atom attached to a carbon atom may be independently replaced with a deuterium atom. A person of ordinary skill in the art will know how to synthesize deuterated forms of the compounds of Formula (I). Commercially available deuterated starting materials may be employed in the preparation of deuterated forms of the compounds of Formula (I), or they may be synthesized using conventional techniques employing deuterated reagents (e.g. lithium aluminum deuteride).
  • the compounds of the invention may exist in solid or liquid form. In the solid state, the compounds of the invention may exist in crystalline or noncrystalline form, or as a mixture thereof.
  • pharmaceutically-acceptable solvates may be formed wherein solvent molecules are incorporated into the crystalline lattice during crystallization. Solvates may involve nonaqueous solvents such as ethanol, isopropanol, DMSO, acetic acid, ethanolamine, and ethyl acetate, or they may involve water as the solvent that is incorporated into the crystalline lattice.
  • Hydrates wherein water is the solvent that is incorporated into the crystalline lattice are typically referred to as "hydrates.” Hydrates include stoichiometric hydrates as well as compositions containing vaiable amounts of water. The invention includes all such solvates.
  • polymorphs may exhibit polymorphism (i.e. the capacity to occur in different crystalline structures). 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 arangement, 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 melting points, IR spectra, and X-ray powder diffraction patterns, which may be used for identification.
  • 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 polymorphs. In addition, one polymorph may spontaneously convert to another polymorph under certain conditions.
  • the compounds according to Formula I are prepared using conventional organic syntheses. Suitable synthetic routes are depicted below in the following general reaction scheme. 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 the 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.
  • Scheme 1 represents a general reaction scheme for preparing compounds of Formula I.
  • Mobile phase water containing 0.05% TFA / acetonitrile.
  • Mobile phase water containing 0.04% ammonia/ acetonitrile.
  • Step 1 A solution of sodium nitrite (18.4 g) in 133 mL of water was added dropwise at 0 °C, while stirring, to a suspension of (4-aminophenyl)acetic acid (40.2 g) in 133 mL of water and 54 mL of concentrated hydrochloric acid. After the addition was complete, the reaction mixture was stirred at the same temperature for 45 minutes. This solution of cold diazonium salt was then added dropwise at room temperature to a mixture of potassium ethylxanthate (49.4 g), 80 mL of water and 200 mL of 2 sodium carbonate solution. The mixture was heated to 45 °C and stirred at this temperature until gas evolution stops.
  • Step 2 (4- ⁇ [(Ethyloxy)carbonothioyl]thio ⁇ phenyl)acetic acid (90 g) was taken up in 340 mL of ethanol, and a solution of 70 g of potassium hydroxide in 340 mL of water was added. Boiling at reflux was effected for 20 hours. The major portion of ethanol was subsquently removed by the distillation under reduced pressure. The aqueous phase was cooled with ice, and acidified with concentrated hydrochloric acid while stirring. The obtained solution was extracted with diethyl ether (500 mL).
  • Step 3 To a solution of (4-mercaptophenyl)acetic acid (33 g) in N,N-dimethylformamide (DMF) (240 mL) was added 2CO3 (108 g) and bromoethane (64.1 g). The reaction mixture was stirred at RT. After 2.5 hours, the starting material was totally consumed. The reaction mixture was partitioned between ethyl acetate (300 mL) and water (300 mL).
  • DMF N,N-dimethylformamide
  • Step 4 A solution of ethyl [4-(ethylthio)phenyI]acetate (34 g) in dichloromethane (DCM) (500 mL) was cooled to 0 °C with an ice bath. mCPBA (78 g) was added in portions, and the reaction mixture was stirred at RT overnight. The obtained suspension was filtered. The filtrate was washed with sat. sodium carbonate solution (400 mL x 2), water (500 mL), then brine (250 mL). The obtained solution was dried over sodium sulphate, filtered, and concentrated.
  • DCM dichloromethane
  • Step 1 To a round-bottomed two-necked flask was charged with 1 -phenylethanone (24.03 g), ethyl cyanoacetate (33.9 g), acetic acid (5.72 mL), morpholine (26.1 mL) and ethanol (50 mL). The mixture was stirred at 55 °C (oil bath temperature: 55 °C) overnight. Sulfur (9.62 g) was added. The reaction mixture was stirred at 55 °C (oil bath temperature: 55 °C) for another day. The solution was partitioned between DCM and water. The organic phase was washed with brine, and dried over Na 2 S0 4 . After filtration, solvent was removed.
  • Step 2 Ethanol (33 mL) and NaOH (32.8 mL) were added to ethyl 2-amino-4-phenyl-3- thiophenecarboxylate (5.4 g). The mixture was heated to reflux (oil bath temperature: 100 °C) over 3 days. Water was added. DCM was added to extract the solution for 3 times. The combined organics were dried over Na 2 S0 4 . After filtration and concentration, (4-phenyl-2-tliienyl)amine (3.5 g) was obtained.
  • Step 3 (4-Phenyl-2-thienyl)amine (530 mg), [4-(ethylsulfonyl)phenyl] acetic acid (intermediate l a, 690 mg), EDC (695 mg) and HOBt (555 mg) were added into a 10 mL vial.
  • Dichloromethane (DCM) (15 mL) was added. The reaction mixture was stirred at RT overnight. DCM was removed. The obtained crude was purified by reversed column eluting with acetonitrile and water to afford 2- [4-(efliylsulfonyl)phenyl]-N-(4-phenyl-2-thienyl)acetamide (460 mg).
  • Step 4 To a solution of benzoyl chloride (0.061 mL) and 2-[4-(efhylsulfonyl)phenyl]-N-(4- phenyl-2-thienyI)acetamide (102 mg) in 1 ,2-dichloroethane (DCE) (4 mL) was added tin(IV) chloride (0.529 mL). The reaction mixture was heated to reflux (oil bath temperature: 92 °C). After 1 ,5 hours, water was added to quench the reaction. The solution was partitioned between DCM and water. The aqueous phase was washed with DCM for another 3 times. The combined organics were dried over Na2SC> .
  • DCE ,2-dichloroethane
  • Step 1 A mixture of l-(3-chlorophenyl)ethanone (30 g), ethyl 2-cyanoacetate (65.9 g), sulfur (8.09 g) and morpholine (33.8 g) in ethanol (340 mL) was heated to reflux and stirred overnight. Solvent was removed, and the residue was purified by flash chromatography (silica gel, PE : EtOAc 20: 1 to 10: 1) to give ethyl 2-amino-4-(3-chlorophenyl)- thiophene-3-carboxylate (15 g) as a yellow solid. MS(ES + ) m/z 282 (MH + ).
  • Step 2 A solution of KOH (50.8 g) was added to a solution of ethyl 2-amino-4-(3- chlorophenyl)thiophene-3-carboxylate (15 g) in ethanol (200 mL). Then the reaction mixture was heated to reflux for 20 hours. The solution was cooled to room temperature and concentrated. To the residue was added water (150 mL), and then the solution was acidified to pH ⁇ 7 with 4 M HCl, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2-amino-4-(3-chlorophenyl)thiophene-3-carboxylic acid (11 g) as a beige solid. MS(ES + ) m/z 254 (MH ).
  • Step 3 To a solution of 2-amino-4-(3-chlorophenyl)fhiophene-3-carboxylic acid (11 g) in etlianol (150 mL) was added 2 M HCl (92 mL) solution, and the reaction mixture was stirred at room temperature for 2 hours. Solvent was removed in vacuo, and the residue was triturated with diethyl ether to give 4-(3-chlorophenyl)tniophen-2-amine hydrochloride (7.3 g) as a beige solid. MS(ES + ) m/z 210 (MH + ).
  • Step 4 To a solution of 4-(3-chlorophenyl)thiophen-2-amine hydrochloride (6 g), 2-(4- (ethylsulfonyl)phenyl)acetic acid (intermediate la, 6.51 g), EDC (6.31 g) and HOBt (4.37 g) in dichloromethane (DCM) (90 mL) was added dropwise DIPEA (7.66 mL) at room temperature. The reaction mixture was heated at reflux under nitrogen overnight.
  • DCM dichloromethane
  • Step 5 To a solution of N-(4-(3-chlorophenyl)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)acetamide (5 g) and 2-chlorobenzoyl chloride (4.17 g) in 1,2-dichloroethane (DCE) (100 mL) was added dropwise tin(IV) chloride (23.81 mL) at 0 °C, and then the reaction mixture was heated to reflux for 3 hours. The reaction mixture was diluted with DCM (50 mL), and the organic phase was washed with water (100 mL). The aqueous layer was extracted with DCM (30 mL x 3).
  • DCE 1,2-dichloroethane
  • Step 1 A solution of l-(3-bromophenyl)ethanone (40 g), ethyl 2-cyanoacetate (34.1 g), morpholine (35.0 g) and sulfur (10.27 g) in ethanol (50 mL) was stirred at 105 °C for 14 hours.
  • Step 2 To a solution of ethyl 2-amino -(3-bromophenyl)thiophene-3-carboxylate (17 g) in ethanol (100 mL) was added a solution of potassium hydroxide (1 1.70 g) in water (100 mL). The reaction mixture was stirred under reflux (oil bath temperature: 105 °C) overnight. Solvent was removed in vacuo. The residue was dissolved in water (200 mL), and cone. HCI was added dropwise to adjust pH to 7. The solid was collected by filtration to give 2-amino-4-(3-bromophenyl)thiophene- 3-carboxylic acid as a black solid. MSiES 4 ) m/z 428 (MH ⁇ ).
  • Step 3 To a solution of 2-amino-4-(3-bromophenyl)thiophene-3-carboxylic acid (20 g) in ethanol (50 mL) stirred at room temperature in air was added 2 M HCI (20 mL) solution in one charge. The reaction mixture was stirred at 20 °C for 2 hours. Solvent was removed in vacuo, and the residue was triturated with ether to give the crude 4-(3-bromophenyl)thiophen-2-amine hydrochloride (13 g) as a grey solid. MS ⁇ S”) m/z 254 (Ivffif).
  • Step 4 A suspension of 4-(3-bromophenyl)thiophen-2-amine hydrochloride (18 g), 2-(4- (ethylsulfonyl)phenyl) acetic acid (intermediate la, 16.97 g), (lH-benzo[ci][l,2,3]triazol-l-yloxy)- tris(dimethylamino)phosphonium hexafluorophosphate(V) (54.8 g) in DMF (20 mL) was stirred at 50 °C overnight. Most of solvent was removed in vacuo, and the residue was poured into water (250 mL).
  • Step 5 A suspension of N(4-(3-bromophenyl)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)acetamide (1.2 g) and cyanocopper (0.477 g) in N-methyI-2-pyrrolidone ( ⁇ ) (12 mL) was stirred at 190 °C for 10 hours. After cooling down to RT, the solid was removed by filtration. The filtrate was poured into water (150 mL), and the mixture was extracted with ethyl acetate (100 mL). The organic layer was washed with brine, dried over anhydrous sulfate, filtered and concentrated.
  • Step 6 To a solution of N-(4-(3-cyanophenyl)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)acetamide (368 mg) and 2-chlorobenzoyl chloride (314 mg) in 1,2- dichloroethane (DCE) (6 mL) was added tin(IV) chloride (0.210 mL), The reaction mixture was heated to reflux (oil bath temperature: 92 °C) for 80 mins. After cooling to RT, the mixture was poured into water (50 mL), and then extracted with DCM (50 mL). The organic layer was dried over anhydrous sulfate, filtered and concentrated.
  • DCE 1,2- dichloroethane
  • Step 1 To a solution of 4-(3-chlorophenyl)thiophen-2-amine hydrochloride (0.50 g, see step 3 for synthesis of Example 2), 2-(4-(methylsulfonyI)phenyl)acetic acid (0.46 g), EDC (0.62 g) and HOBt (0.43 g) in dichloromethane (DCM) (20 mL) was added dropwise DIPEA (0.75 mL) at room temperature. The reaction mixture was heated at reflux under nitrogen overnight. The reaction mixture was partitioned between DCM (60 mL) and water (30 mL).
  • DCM dichloromethane
  • Step 2 To a solution of N-(4-(3-chlorophenyl)thiophen-2-yl)-2-(4-(methylsulfonyl)phenyl)- acetamide (200 mg) and 2-chIorobenzoyl chloride (172 mg) in 1 ,2-dichloroethane (DCE) (16 mL) was added tin(IV) chloride (0.985 mL). The reaction mixture was heated to reflux for 2 hours. The reaction mixture was diluted DCM (50 mL), and then washed with water (20 mL). The aqueous phase was extracted with DCM (20 mL). The combined organic phases were dried over anhydrous sodium sulfate and concentrated.
  • DCE 1,2-dichloroethane
  • Step 1 A suspension of 4-(3-bromophenyl)thiophen-2-amine hydrochloride (1.1 g, see step 3 for synthesis of Example 3), 2-(4-(methylsulfonyl)-phenyl)acetic acid (0.98 g) and (1H- benzo[ ⁇ [l,2,3]triazoI-l-yloxy)tris(dimethylamino)- phosphonium exafluorophosphate (V) (3.35 g) in DMF (20 mL) was stirred at 50 °C under nitrogen overnight. The mixture was poured into water (250 mL), and the solution was extracted with ethyl acetate (130 mL).
  • Step 2 A suspension of N-(4-(3-bromophenyl)thiophen-2-yl)-2-(4- (metliylsulfonyl)phenyl)acetamide (1.2 g) and cyanocopper (0.477 g) in N-methyl-2-pyrrolidone ( ⁇ ) (12 mL) was stirred at 190 °C for 10 hours. After the reaction was complete, the mixture was cooled to room temperature and poured into water (150 mL). The solution was extracted with ethyl acetate (100 mL). The organic layer was washed with brine, dried over anhydrous sulfate, and concentrated.
  • Step 3 To a solution of N-(4-(3-cyanophenyl)thiophen-2-yl)-2-(4-(methylsulfonyl)- phenyl)acetamide (153 mg) and 2-chlorobenzoyl chloride (270 mg) in 1 ,2-dichloroethane (DCE) (6 mL) was added tin(IV) chloride (1 mL). The reaction mixture was stirred at reflux for 1 hour. After the reaction was complete, the mixture was poured into water (40 mL). The solution was extracted with DCM (70 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated.
  • DCE 1,2-dichloroethane
  • Step 2 To a solution of ethyl 2-amino-4-(4-chlorophenyl)thiophene-3-carboxylate (2.2 g) in ethanol (100 mL) was added potassium hydroxide (1.7 g) in water (100 mL). The reaction mixture was stirred at 105 °C overnight. Solvent was removed in vacuo. To the residue was added water (100 mL), and then the solution was acidified to pH ⁇ 7 with 2 M HC1, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2- amino-4-(4-chlorophenyl)-thiophene-3-carboxylic acid (1.9 g). MS(ES + ) m/z 254 (MH + ).
  • Step 3 To a solution of 2-amino-4-(4-chlorophenyl)thiophene-3-carboxylic acid (1.9 g) in ethanol (50 mL) stirred in air at room temperature was added a solution of hydrochloric acid (2 M, 10 mL) in one charge. The reaction mixture was stirred at 20 °C for 2 hours. Solvent was removed in vacuo, and the residue was triturated with ether to give 4-(4-chlorophenyl)thiophen-2-amine hydrochloride (1.7 g) as a grey solid. MS(ES + ) m/z 210 (MH + ).
  • Step 4 A suspension of 4-(4-chlorophenyl)thiophen-2-amine hydrochloride (2.2 g), 2-(4- (ethylsulfonyl)phenyl)acetic acid (intermediate la, 2.0 g) and BOP reagent (4.7 g) in DMF (8 mL) was stirred at 50 °C under nitrogen overnight. The mixture was poured into water (300 mL), and the solution was extracted with ethyl acetate (150 mL). The organic layer was washed with brine (200 mL x 3), dried over anhydrous sodium sulfate, and concentrated.
  • Step 5 To a solution of N-(4-(4-chlorophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)- phenyl)acetamide (390 mg) and benzoyl chloride (261 mg) in 1 ,2-dichloroethane (DCE) (16 mL) was added tin(iV) chloride (0.22 mL). The reaction mixture was stirred at reflux 1.5 hours. After cooling to room temperature, the mixture was poured into water (50 mL), and the solution was extracted with DCM (150 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated.
  • DCE 1,2-dichloroethane
  • Step 2 A solution of OH (1.1 g) was added to a solution of ethyl 2-amino-4-(2- fluorophenyl)thiophene-3-carboxylate (1.32 g) in ethanol (20 mL). Then the reaction mixture was heated to reflux for 20 hours. The solution was cooled to room temperature and concentrated. To the residue was added water (15 mL), and then the solution was acidified to pH ⁇ 7 with 4 M HC1, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2-amino-4-(2-fluorophenyl)thiophene-3-carboxyIic acid (0.8 g) as a beige solid. MSfES”) m/z 238 (MET 1 ).
  • Step 3 To a solution of 2-amino-4-(2-fluorophenyl)thiophene-3-carboxylic acid (0.8 g) in ethanol (20 mL) was added 2 M HC1 (5.5 mL) solution. The reaction mixture was stirred at room temperature for 2 hours. Solvent was removed in vacuo, and the residue was triturated with diethyl ether to give 4-(2-fluorophenyl)thiophen-2-amine (0.6 g) as a beige solid. MS(ES + ) m/z 194 (MH + ).
  • Step 4 To a solution of 4-(2-fluorophenyl)thiophen-2 -amine (0.4 g), 2-(4- (ethylsulfonyl)phenyl)acetic acid (intermediate la, 0.38 g), EDC (0.31 g) and HOBt (0.25 g) in dichloromethane (DCM) (15 mL) was added dropwise DLPEA (0.48 mL) at room temperature. The reaction mixture was heated at reflux under nitrogen overnight. The reaction mixture was partitioned between DCM (30 mL) and water (20 mL). The organic phase was washed with water (20 mL x 2), brine (20 mL), dried over anhydrous sodium sulfate, and concentrated.
  • DCM dichloromethane
  • Step S To a solution of 2-(4-(ethylsuIfonyl)phenyl)-N-(4-(2-fluorophenyl)thiophen-2- yl)acetamide (0.2 g) and 2-chlorobenzoyl chloride (0.17 g) in 1 ,2-dichloroethane (DCE) (16 mL) was added dropwise tin(IV) chloride (0.99 mL) at 0 °C. The reaction mixture was heated to reflux for 3 hours. The reaction mixture was diluted with DCM (30 mL), and the organic phase was washed with water (20 mL). The aqueous layer was extracted with DCM (30 mL x 3).
  • DCE ,2-dichloroethane
  • Step 2 A solution of KOH (1.1 g) was added to a solution of ethyl 2-amino-4-(4- fluorophenyl)thiophene-3-carboxylate (1.32 g) in ethanol (20 mL). The reaction mixture was then heated to reflux for 20 hours. The solution was cooled to room temperature and concentrated. To the residue was added water (15 mL), and then the solution was acidified to pH ⁇ 7 with 4 M HC1, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2-amino-4-(4-fluorophenyl)thiophene-3-carboxylic acid (0.9 g) as a beige solid. MS(ES + ) m/z 238 (MH + ).
  • Step 3 To a solution of 2-amino-4-(4-fluorophenyl)thiophene-3-carboxylic acid (0.9 g) in ethanol (20 mL) was added 2 M HC1 (9.5 mL) solution. The reaction mixture was stirred at room temperature for 2 hours. Solvent was removed in vacuo. The residue was triturated with diethyl ether to give 4-(4-fluorophenyl)thiophen-2-amine (0.7 g) as a beige solid. MS(ES + ) m/z 1 4 (MH + ).
  • Step 4 To a solution of 4-(4-fluorophenyl)thiophen-2 -amine (0.5 g), 2-(4- (ethylsulfonyl)phenyl)acetic acid (intermediate la, 0.54 g), EDC (0.46 g) and HOBt (0.36 g) in dichloromethane (DCM) (15 mL) was added dropwise DIPEA (0.69 mL) at room temperature. The reaction mixture was heated at reflux under nitrogen overnight. The reaction mixture was partitioned between DCM (30 mL) and water (20 mL). The organic phase was washed with water (20 mL x 2), brine (20 mL), dried over anhydrous sodium sulfate, and concentrated.
  • DCM dichloromethane
  • Step 5 To a solution of 2-(4-(ethylsuIfonyl)phenyl)-N-(4-(4-fluorophenyl)thiophen-2- yl)acetamide (0.2 g) and 2-chlorobenzoyI chloride (0.17 g) in 1 ,2-dichIoroethane (DCE) (16 mL) was added dropwise tin(IV) chloride (0.99 mL) at 0 °C. The reaction mixture was heated to reflux for 3 hours. The reaction mixture was diluted with DCM (30 mL), and the organic phase was washed with water (20 mL). The aqueous layer was extracted with DCM (30 mL x 3).
  • DCE ,2-dichIoroethane
  • Step 2 A solution of KOH (1.21 g) in water (10 mL) was added to a solution of ethyl 2-amino- 4-(3-(trifluoromethyl)phenyl)thiophene-3-carboxylate (1.7 g) in ethanol (50 mL). The reaction mixture was stirred at reflux for 20 hours. The mixture was cooled to room temperature and concentrated. To the residue was added water (50 mL), and the solution was extracted with EtOAc (50 mL x 3). The combined organic phases were dried over sodium sulfate and concentrated to give 4-(3-(trifiuoromethyl)phenyl)thiophen-2 -amine (800 mg) as a black oil. MS(ES + ) m/z 244 (MH + ).
  • Step 3 To a solution of 4-(3-(trifluoromethyl)phenyl)thiophen-2-amine (800 mg), 2-(4- (ethylsulfonyl)phenyl)acetic acid (1.13 g), HOBt (504 mg) and DIPEA (1.72 mL) in THF (30 mL) stirred at room temperature under nitrogen was added EDC (1.89 g) in one charge. The reaction mixture was stirred at 70 °C overnight.
  • Step 4 To a solution of 2-chlorobenzoyl chloride (190 mg) and 2-(4-(ethylsulfonyl)phenyl)-N- (4-(3-(trifluoromethyl)phenyl)thiophen-2-yl)acetamide (246 mg) in 1,2-dichloroethane (DCE) (16 mL) was added tin(IV) chloride (1 mL). The reaction mixture was stirred at reflux for 150 mins. The mixture was cooled to room temperature, poured into water (50 mL), and then extracted with DCM (150 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated.
  • DCE 1,2-dichloroethane
  • Step 2 To a solution of ethyl 2-amino-4-(3-fluorophenyl)thiophene-3-carboxylate (0.8 g) in ethanol (100 mL) was added potassium hydroxide (0.7 g) in water (100 mL). The reaction mixture was stirred at 105°C overnight. The mixture was concentrated, and the residue was dissolved in water (200 mL). The solution was acidified to pH ⁇ 7 with 2 M hydrochloric acid, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2-amino-4-(3-fluorophenyl)thiophene-3-carboxylic acid (0.5 g). MS(ES ⁇ ) m/z 254 (MH + ).
  • Step 3 To a solution of 2-amino-4-(3-fluorophenyI)fhiophene-3-carboxyHc acid (0.5 g) in ethanol (50 mL) was added a solution of hydrochloric acid (2 M, 20 mL) in one charge. The reaction mixture was stirred at 20 °C for 2 hours. Solvent was removed in vacuo, and the residue was triturated with ether to give 4-(3-fluorophenyl)thiophen-2-amine hydrochloride (0.7 g) as a grey solid. MS(ES + ) m/z l94 (MH* .
  • Step 4 A suspension of 4-(3-fluorophenyl)thiophen-2-amine hydrochloride (0.5 g), 2-(4-
  • Step 5 To a solution of 2-chlorobenzoyl chloride (4 1 mg) and 2-(4-(ethylsulfonyl)phenyl)-N- (4-(3-fluorophenyl)thiophen-2-yI)acetamide (520 mg) in 1 ,2-dichloroethane (DCE) (16 mL) was added tin(IV) chloride (0.30 mL). The reaction mixture was stirred at reflux for 130 mins. The mixture was cooled to room temperature, poured into water (50 mL), and then extracted with DCM (150 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated.
  • DCE 1,2-dichloroethane
  • Step 2 To a solution of ethyl 2-amino-4-(4-bromophenyl)thiophene-3-carboxylate (4.25 g) in ethanol (75 mL) and water (75 mL) was added potassium hydroxide (1.83 g). The reaction mixture was refluxed for 30 hours. Ethanol was removed in vacuo, and the aqueous phase was extracted with EtOAc. The organic phase was washed with water and brine, dried over anhydrous sodium sulfate, and concentrated to give 4-(4-bromophenyl)thiophen-2-amine (2.32 g) as a grey solid. MStES ) m/z 254 (MH + ).
  • Step 4 To a solution of N-(4-(4-bromophenyl)thiophen-2-yl)-2-(4- (etliylsulfonyl)phenyl)acetamide (500 mg) in ⁇ (3 mL) was added copper(I) cyanide (192 mg). The reaction mixture was heated at 1 0 °C in the microwave for 3 hours. The reaction mixture was filtered to remove the solid, and the residue was partitioned between ethyl acetate (20 mL) and water (20 mL).
  • Step 5 To a solution of N-(4-(4-cyanophenyI)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)acetamide (200 mg) in 1,2-dichloroethane (DCE) (30 mL) was added tin(IV) chloride (254 mg) and benzoyl chloride (137 mg). The reaction mixture was refluxed for 1 hour. The mixture was partitioned between water (100 mL) and DCM (50 mL). The organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated.
  • DCE 1,2-dichloroethane
  • Step 1 To a solution of 2-(4-nitrophenyI)propanoic acid (10 g) in methanol (200 mL) was added Pd/C (10%, 300 mg). The mixture was stirred at room temperature under hydrogen for 1 d. The mixture was filtered, and the filtrate was concentrated to give 2-(4-aminophenyl)propanoic acid (8 g) as a brown oil. MS(ES + ) m/z 166 (MET).
  • Step 2 A solution of sodium nitrite (3.35 g) in water (20 mL) was added dropwise to a suspension of 2-(4-aminophenyl)propanoic acid (8 g) in water (26 mL) and concentrated hydrochloric acid (60 mL) stirred at 0 °C. After the addition was complete, the reaction mixture was stirred at the same temperature for a further 45 minutes. This cold diazonium salt solution was then added dropwise at room temperature to a mixture of potassium O-ethyl carbonodithioate (9.0 g) in 40 mL of water and 40 mL of a 2 M sodium carbonate solution, and the mixture was heated at 45 °C until gas evolution stopped.
  • potassium O-ethyl carbonodithioate 9.0 g
  • Step 3 2-(4-(ethoxycarbonothioylthio)phenyl)propanoic acid (13 g) was taken up in 60 mL of ethanol, and a solution of KOH (19.88 g) in 60 mL of water was added. The reaction mixture was refluxed for 3 hours. The major portion of ethanol was subsequently removed in vacuo. The aqueous phase was cooled with ice, and was rendered acid with concentrated hydrochloric acid while stirring well. The desired product was extracted with DCM (50 mL x 3).
  • Step 4 To a solution of 2-(4-mercaptophenyl)propanoic acid (8 g) in NN-dimethylformamide (100 mL) was added bromoethane (14.35 g) and potassium carbonate (24.27 g). The reaction mixture was stirred at room temperature overnight. The mixture was partitioned between ethyl acetate (200 mL) and water (200 mL). The organic phase was washed with water (100 mL x 4) and brine (50 mL), dried with sodium sulfate, filtered, and concentrated to give ethyl 2-(4-(ethylthio)phenyl)propanoate (12 g) as red oil. MS(ES + ) m/z 239 (MH + ).
  • Step 5 To a solution of ethyl 2-(4-(ethylthio)phenyl)propanoate (12 g) in dichloromethane (100 mL) was added wCPBA (26.1 g). The reaction mixture was stirred at room temperature overnight. The reaction mixture was filtered to remove the solid. The filtrate was washed with sat, sodium carbonate solution (200 mL x 2), water (100 mL), brine (50 mL), dried over sodium sulfate, filtered, and concentrated.
  • Step 7 To a solution of 4-(3-chlorophenyl)thiophen-2-amine hydrochloride (200 mg, see step 3 for synthesis of Example 2) in dichloromethane (40 mL) was added 2-(4-chlorophenyl)thiophen-2-amine hydrochloride (200 mg, see step 3 for synthesis of Example 2) in dichloromethane (40 mL) was added 2-(4-chlorophenyl)thiophen-2-amine hydrochloride (200 mg, see step 3 for synthesis of Example 2) in dichloromethane (40 mL) was added 2-(4-
  • Step 8 To a solution of N-(4-(3-chlorophenyI)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)propanamide (170 mg) in dry 1 ,2-dichloroethane (DCE) (20 mL) was added tin(IV) chloride (254 mg) and benzoyl chloride (137 mg). The reaction mixture was refluxed for 1 hour. Water (50 mL) and DCM (50mL) were added. The organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated. The residue was purified with preparative HPLC to give N- ⁇ 4-(3 -chl orophenyl)-5- [(2 -chlorophenyl)carbonyl]-2-thienyl ⁇ -2- [4-
  • Step 2 A mixture of ethyl 2-amino-4-(3-fluorophenyl)thiophene-3-carboxylate (1.5 g) and potassium hydroxide (1.6 g) in ethanol (30 mL) and water (30 mL) was stirred at 105 °C overnight, ethanol was removed, and to the residue was added water (200 mL). The solution was acidified to pH ⁇ 7 with 2 M HC1 solution, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2-amino-4-(3- fluorophenyI)thiophene-3-carboxylic acid (1.2 g). MS(ES ⁇ m/z 288 (MH*).
  • Step 3 To a solution of 2-amino-4-(3-(trifluoromethyl)phenyl)thiophene-3-carboxylic acid (1.2 g) in ethanol (30 mL) was added hydrochloric acid (2 M, 30 mL) in one charge. The reaction mixture was stirred at 20 °C for 2 hours. Solvent was removed, and the residue was triturated with diethyl ether to give 4-(3-(trifluoromethyl)phenyl)thiophen-2-ainine hydrochloride (0.7 g) as a grey solid. MS(ES + ) m/z 244 (MH + ).
  • Step 4 A mixture of 4-(3-(trifluoromethyl)phenyl)thiophen-2-amine hydrochloride (0.5 g), 2- (4-(ethylsulfonyl)-phenyl)acetic acid (intermediate la, 0.6 g), BOP (1.1 g), and DIPEA (0.6 g) in DMF (12 mL) was stirred at 50 °C overnight. The reaction mixture was poured into water (300 mL) and extracted with ethyl acetate (150 mL). The organic layer was washed with brine, dried and concentrated.
  • Step 5 To a mixture of 2-chlorobenzoyl chloride (184 mg) and 2-(4-(ethylsulfonyl)phenyl)-N- (4-(3-(trifluoromethyl)phenyl)thiophen-2-yl)acetamide (436 mg) in 1,2-dichloroethane (DCE) (16 mL) was added tin(IV) chloride (0.30 mL). The reaction mixture was heated at reflux for 24 hours. After cooling to RT, the mixture was poured into water (50 mL), The solution was extracted with DCM (150 mL), and the organic phase was dried and concentrated.
  • DCE 1,2-dichloroethane
  • the compounds according to Formula I are RORy modulators, and are useful in the treatment of diseases mediated by RORy.
  • the biological activities of the compounds according to Formula I can be determined using any suitable assay for determining the activity of a candidate compound as a RORy modulator, as well as tissue and in vivo models.
  • This assay is based on the knowledge that nuclear receptors interact with cofactors (transcription factors) in a ligand dependent manner.
  • RORy is a typical nuclear receptor in that it has an AF2 domain in the ligand binding domain (LBD) which interacts with co-activators.
  • LBD ligand binding domain
  • the sites of interaction have been mapped to the LXXLL motifs in the co-activator SRC 1(2) sequences. Short peptide sequences containing the LXXLL motif mimic the behavior of full-length co-activator.
  • the assay measures ligand-mediated interaction of the co-activator peptide with the purified bacterial -expressed RORy ligand binding domain (RORy-LBD) to indirectly assess ligand binding.
  • RORy has a basal level of interaction with the co-activator SRC 1(2) in the absence of ligand, thus it is possible to find ligands that inhibit or enhance the RORy/SRCI(2) interaction.
  • RORy-LBD Human RORy Ligand Binding Domain
  • E.coli cell pellet was resuspended in 300 mL of lysis buffer (30 mM imidazole pH 7.0 and 150 mM NaCl). Cells were lysed by sonication and cell debris was removed by centrifugation for 30 minutes at 20,000g at 4°C. The cleared supernatant was filtered through a 0.45 uM cellulose acetate membrane filter. The clarified lysate was loaded onto a column (XK-26) packed with ProBond Nickel Chelating resin (InVitrogen), pre-equilibrated with 30 mM imidazole pH 7.0 and 150 mM NaCl.
  • lysis buffer 30 mM imidazole pH 7.0 and 150 mM NaCl
  • the column was developed with a gradient from 30 to 500 mM imidazole pH 7.0. Column fractions containing the RORy-LBD protein were pooled and concentrated to a volume of 5 mis. The concentrated protein was loaded onto a Superdex 200 column pre-equilibrated with 20 mM Tris-Cl pH 7.2 and 200 mM NaCl. The fractions containing the desired RORy-LBD protein were pooled together.
  • Purified RORy-LBD was buffer exchanged by exhaustive dialysis [3 changes of at least 20 volumes (>8000x)] against PBS [lOOmM NaPhosphate, pH 8 and 150mM NaCl].
  • concentration of RORy-LBD was approximately 30uM in PBS.
  • Five-fold molar excess of NHS-LC-Biotin (Pierce) was added in a minimal volume of PBS. This solution was incubated with occasional gentle mixing for 60 minutes at ambient room temperature.
  • the modified RORy-LBD was dialyzed against 2 buffer changes - TBS pH 8.0 containing 5mM DTT, 2mM EDTA and 2% sucrose - each at least 20 times of the volume.
  • the modified protein was distributed into aliquots, frozen on dry ice and stored at -80°C.
  • the biotinylated RORy-LBD was subjected to mass spectrometric analysis to reveal the extent of modification by the biotinylation reagent. In general, approximately 95% of the protein had at least a single site of biotinylation and the overall extent of biotinylation followed a normal distribution of multiple sites ranged from one to five.
  • biotinylated SRC1(2) solution was prepared by adding an appropriate amount of biotinylated SRC 1(2) from the lOOuM stock solution to a buffer containing 10 mM of freshly added DTT from solid to give a final concentration of 40 nM.
  • An appropriate amount of Europium labeled Streptavidin was then added to the biotinylated SRC 1(2) solution in a tube to give a final concentration of 10 nM. The tube was inverted gently and incubated for 15 minutes at room temperature. Twenty-fold excess biotin from the 10 mM stock solution was added and the tube was inverted gently and incubated for 10 minutes at room temperature.
  • biotinylated RORy-LBD solution was prepared by adding an appropriate amount of biotinylated RORy-LBD from the stock solution to a buffer containing 10 mM of freshly added DTT from solid to give a final concentration of 40 nM.
  • An appropriate amount of APC labeled Streptavidin was then added to the biotinylated RORy-LBD solution in a tube to give a final concentration of 20 nM. The tube was inverted gently and incubated for 15 minutes at room temperature. Twenty-fold excess biotin from the 10 mM stock solution was then added and the tube was inverted gently and incubated for 10 minutes at room temperature.
  • Equal volumes of the above-described Europium labeled SRC 1(2) peptide and the APC labeled RORy-LBD were gently mixed together to give 20nM RORy-LBD, ⁇ APC-Strepavidin, 20nM SRC1(2) and 5nM Europium- Streptavidin.
  • the reaction mixtures were incubated for 5 minutes.
  • 25 ul of the reaction mixtures per well was added to the 384-well assay plates containing lul of test compound per well in 100% DMSO. The plates were incubated for lhour and then read on ViewLux in Lance mode for EU/APC.
  • RORy is known to bind to a CNS (conserved non-coding sequences) enhancer element in the IL17 promoter.
  • RORy activity is indirectly assessed using a luciferase reporter construct which contains the human IL 17 promoter having the RORy-specific CNS enhancer element.
  • the 3 Kb human IL17 promoter containing the RORy- specific CNS enhancer element was PCR amplified from human genomic DNA and cloned into a pGL4-Luc2/hygro reporter plasmid sequencially as Xhol-Hindlll (1.1 Kb) and Kpnl-Xhol (1.9 Kb) fragments.
  • PCR was used to amplify human IL17 proximal promoter region from genomic DNA of 293T cells using primers as follows: forward primer, 5'- CTCG AGT AG AGCAGGAC AGGG AGG AA-3 ' (Xhol site is underlined) and reverse primer, 5'- AAGCTTGG ATGG ATG AGTTTGTGCCT-3 ' (Hindlll site is underlined).
  • forward primer 5'- CTCG AGT AG AGCAGGAC AGGG AGG AA-3 ' (Xhol site is underlined)
  • reverse primer 5'- AAGCTTGG ATGG ATG AGTTTGTGCCT-3 ' (Hindlll site is underlined).
  • the 1.1 kb DNA bands were excised, purified, and inserted into pMD19-T Simple Vector (Takara).
  • the 1.1 kb DNA was digested with Xhol and Hindlll and inserted into Xhol/Hindlll sites of pGL4.31[luc2P/GAL4UAS/Hygro] (Promega) to generate the pIL17-lkb-luc reporter construct.
  • PCR was used to amplify human IL17 promoter region from genomic DNA using primers as follows: forward primer, 5'-
  • the luciferase reporter plasmid and the RORyt overexpression plasmid were transfected into Jurkat cell line and a stable clone was identified.
  • the stable clone was grown in 10% dialyzed FBS in RPMI (1640) with 800ug/ml geneticin and 400ug/ml hygromecin.
  • Mouse CD4+ cells were purified using the CD4+ T Cell Isolation II Kit according to manufacturer's instructions (Miltenyi Biotec). 96 well plates were pre-coated with anti-CD3 antibody. Un-coated wells were used as controls. CD4+ Cells were resuspended in RPMI complete medium and were added to the 96-well plates at 3E5 cells/well, with the total volume being 90 ul. Cytokine cocktail and 20ul of each compound were then added to the wells (DMSO final volume 0.1%).
  • the final concentrations of antibodies (R&D Systems) and cytokines (R&D Systems) were: anti-mCD3, 5ug ml; anti-mCD28, 2ug ml; anti-mlFNy, lOug/ml; Anti-mIL4, lOug/ml; mIL-6, 20ng/ml; mIL-23, lOng ml; mIL- ⁇ , lOng ml; TGF- ⁇ , lOng/ml, The culture was incubated in 37°C for 3 days and supernatants were collected for ELISA. The IL-17 ELISAs were performed according to manufacturer's instructions (R&D Systems).
  • Thl 7 differentiation culture described above was maintained for 5 days and cells were analyzed by IL-17 and IFN- ⁇ intracellular staining according to manufacturer's instructions (BD Biosciences).
  • the data described below represents a mean pIC50 value of multiple test results if the test was performed more than once. It is understood that the data illustrated below may have reasonable variation depending on the specific conditions and procedures used by the person conducting the testing.
  • EAE Experimental Autoimmune Encephalomyelitis
  • Example 2 was tested and found to delay EAE onset.
  • Collagen-induced arthritis is an animal model of rheumatoid arthritis.
  • CIA was induced in 8-week old male DBA/1 mice via an initial intradermal (i.d.) injection of an emulsion consisting of bovine type II collagen in CFA.
  • Mice were intraperitoneally (i.p.) injected with bovine type II collagen 21 days later to boost the immune system, resulting in chronic inflammation in both the hind and the front paws.
  • Each compound was given to the mice at lOOmg kg twice a day starting from day 20 after the first immunization. Mice were examined for onset and severity of disease in a blinded manner.
  • Example 2 and Example 4 were tested and found to reduce disease severity in CIA mice.
  • the compounds of the invention are modulators of RORy and can be useful in the treatment of diseases mediated by RORy, particularly autoimmune or inflammatory diseases.
  • the Inflammatory or autoimmune diseases of the invention include multiple sclerosis, rheumatoid arthritis, psoriasis, Crohn's disease, inflammatory bowel disease, Sjorgen's syndrome, optic neuritis, chronic obstructive pulmonary disease, asthma, type I diabetes, neuromyelitis optica, Myasthenia Gavis, uveitis, Guillain- Barre syndrome, psoriatic arthritis, Gaves' disease and allergy. Accordingly, in another aspect the invention is directed to methods of treating such diseases.
  • the methods of treatment of the invention comprise administering a safe and effective amount of a compound according to Formula I or a pharmaceutically-acceptable salt thereof to a patient in need thereof.
  • treat in reference to a condition means: (I) to ameliorate or prevent the condition or one or more of the biological manifestations of the condition, (2) to interfere with (a) one or more points in the biological cascade that leads to or is responsible for the condition or (b) one or more of the biological manifestations of the condition, (3) to alleviate one or more of the symptoms or effects associated with the condition, or (4) to slow the progression of the condition or one or more of the biological manifestations of the condition.
  • prevention of a condition includes prevention of the condition.
  • 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.
  • 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 treat the patient's condition 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 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 to be treated; the duration of the treatment; the nature of concurrent therapy; the desired therapeutic effect; and like factors, but can nevertheless be routinely determined by the skilled artisan.
  • 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.
  • suitable dosing regimens including 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 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 may vary depending upon the particular route of administration chosen. Typical daily dosages for oral administration range from 0.1 mg to 1000 mg.
  • 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.
  • the invention relates to the use of the compounds of the invention in the preparation of a medicament for the treatment of diseases mediated by RORy.
  • the invention relates to the compounds of the invention for use in the treatment of diseases mediated by RORy.
  • diseases include autoimmune or inflammatory diseases such as multiple sclerosis, rheumatoid arthritis, psoriasis, Crohn's disease, inflammatory bowel disease, Sjorgen's syndrome, optic neuritis, chronic obstructive pulmonary disease, asthma, type I diabetes, neuromyelitis optica, Myasthenia Gavis, uveitis, Guillain-Barre syndrome, psoriatic arthritis, Gaves' disease and allergy.
  • autoimmune or inflammatory diseases such as multiple sclerosis, rheumatoid arthritis, psoriasis, Crohn's disease, inflammatory bowel disease, Sjorgen's syndrome, optic neuritis, chronic obstructive pulmonary disease, asthma, type I diabetes, neuromyelitis
  • the compounds of the invention will normally, but not necessarily, be formulated into pharmaceutical compositions prior to administration to a patient. Accordingly, in another aspect the invention is directed to pharmaceutical compositions comprising a compound of the invention and one or more pharmaceutically-acceptable excipient.
  • 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 or syrups.
  • 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.
  • the pharmaceutical compositions of the invention typically contain from 0.1 mg to 1000 rag.
  • 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.
  • 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.
  • each excipient must of course be of sufficiently high purity to render it pharmaceutically-acceptable.
  • 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 dry powders, aerosols, suspensions, and solutions; and (6) topical administration such as creams, ointments, lotions, solutions, pastes, sprays, foams, and gels.
  • oral administration such as tablets, capsules, caplets, pills, troches, powders, syrups, elixers, suspensions, solutions, emulsions, sachets, and cachets
  • parenteral administration such as sterile solutions, suspensions, and powders for reconstitution
  • transdermal administration such as transdermal patches
  • rectal administration such as
  • Suitable pharmaceutically-acceptable excipients will vary depending upon the particular dosage form chosen.
  • suitable pharmaceutically-acceptable excipients may be chosen for a particular function that they may serve in the composition.
  • 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 of 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.
  • 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
  • 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.
  • 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 Reminigton'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).
  • 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).
  • 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.

Abstract

Provided are retinoid-related orphan receptor gamma(ROR γ) modulators of formula (I), processes for their preparation, pharmaceutical compositions containing them, and their uses in the treatment of diseases mediated by ROR γ.

Description

RETINOID-RELATED ORPHAN RECEPTOR GAMMA MODULATORS, COMPOSITION CONTAINING THEM AND USES THEREOF
The present invention relates to novel retinoid-related orphan receptor gamma (RORy) modulators and their use in the treatment of diseases mediated by RORy.
Background of the Invention
Retinoid-related orphan receptors (RORs) are transcription factors which belong to the steroid hormone nuclear receptor superfamily (Jetten & Joo (2006) Adv. Dev. Biol. 16:313-355). The ROR family consists of three members, ROR alpha (RORa), ROR beta (RORp) and ROR gamma (RORy), each encoded by a separate gene (RORA, RORB and RORC, respectively). RORs contain four principal domains shared by the majority of nuclear receptors: an N-terminal A/B domain, a DNA-binding domain, a hinge domain, and a ligand binding domain. Each ROR gene generates several isoforms which differ only in their N-terminal A B domain. Two isoforms of RORy have been identified: RORyl and RORyt (also known as RORy2). RORy is a term used to describe both RORyl and/or RORyt.
While RORyl is expressed in a variety of tissues including thymus, muscle, kidney and liver, RORyt is exclusively expressed in the cells of the immune system. RORyt has been identified as a key regulator of Thl7 cell differentiation. Thl7 cells are a subset of T helper cells which produce IL- 17 and other proinflammatory cytokines. Thl7 cells have been shown to have key functions in several mouse autoimmune disease models including experimental autoimmune encephalomyelitis (EAE) and collagen-induced arthritis (CIA). In addition, Thl7 cells or their products have been shown to be associated with the pathology of a variety of human inflammatory and autoimmune disorders including multiple sclerosis, rheumatoid arthritis, psoriasis, Crohn's disease and asthma (Jetten (2009) Nucl. Recept. Signal. 7: e003; Manel et al. (2008) Nat. Immunol. 9:641-649). The pathogenesis of chronic autoimmune diseases including multiple sclerosis and rheumatoid arthritis arises from the break in tolerance towards self-antigens and the development of auto-aggressive effector T cells infiltrating the target tissues. Studies have shown that Thl7 cells are one of the important drivers of the inflammatory process in tissue-specific autoimmunity (Steinman (2008) J. Exp. Med. 205: 1517- 1522; Leung et al. (2010) Cell. Mol. Immunol. 7: 182-189). There is evidence that Thl7 cells are activated during the disease process and are responsible for recruiting other inflammatory cells types, especially neutrophils, to mediate pathology in the target tissues (Korn et al. (2009) Annu. Rev.
Immunol. 27:485-517).
RORyt plays a critical role in the pathogenic responses of Thl7 cells (Ivanov et al. (2006) Cell 126: 1121 -1 133). RORyt deficient mice show very little Thl7 cells. In addition, RORyt deficiency resulted in amelioration of EAE. Further support for the role of ROR/yt in the pathogensis of autoimmune or inflammatory diseases can be found in the following references: Jetten & Joo (2006) Adv.Dev.Biol. 16:313-355; Meier et al. (2007) Immunity 26:643-654; Aloisi & Pujol-Borrell (2006) Nat. Rev. Immunol. 6:205-217; Jager et al. (2009) J. Immunol. 183:7169-7177; Serafini et al. (2004) Brain _¾/Αο/.14: 164-174; Magliozzi et al. (2007) Brain 130: 1089-1104; Barnes (2008)
Nal.Rev.Immunol. 8:183-192.
In light of the role RORy plays in the pathogenesis of diseases, it is desirable to prepare compounds that modulate RORy activity, which can be used in the treatment of diseases mediated by RORy.
Summary of the Invention
The invention is directed to novel RORy modulators and their use in the treatment of diseases mediated by RORy. Specifically, the invention is directed to compounds according to Formula I.
Figure imgf000003_0001
Formula I
wherein Rl, R2, R3, R4, R5, m and n are defined below, and to pharmaceutically-acceptable salts thereof.
In another aspect, this invention provides for the use of the compounds of Formula I for the treatment of diseases mediated by RORy. Examples of such diseases include autoimmune or inflammatory diseases such as multiple sclerosis, rheumatoid arthritis, psoriasis, Crohn's disease and asthma. In yet another aspect, the invention is directed to methods of treating such diseases.
Detailed Description of the Invention
Terms and Definitions
In describing the invention, chemical elements are identified in accordance with the Periodic Table of the Elements. "Alkyl" refers to a monovalent saturated hydrocarbon chain having the specified number of member atoms. For example, C1-C6 alkyl refers to an alkyl group having from 1 to 6 member atoms. Alkyl groups may be optionally substituted with one or more substituent 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.
"Alkoxy" refers to the group -O-R where R is alkyl having the specified number of member atoms. Alkoxy includes methoxy, ethoxy and propoxy.
"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" refers to the time required for half of a quantity of a substance to be converted to another chemically distinct species in vitro or in vivo.
"Halo" refers to the halogen radicals fluoro, chloro, bromo, and iodo.
"Heteroatom" refers to a nitrogen, sulphur, or oxygen atom.
"Member atoms" refers to the atom or atoms that form a chain or ring. Where more than one member atom is present in a chain and within a ring, each member atom is covalently bound to an adj cent member atom in the chain or ring. Atoms that make up a substituent group on a chain or ring are not member atoms in the chain or ring.
"Optionally substituted" indicates that a group, such as alkyl, alkenyl, alkynyl, aryl, cycloalkyl, cycloalkenyl, heterocycloalkyl, or heteroaryl, may be unsubstituted, or the group may be substituted with one or more substituent as defined.
"RORy" refers to all isoforms encoded by the RORC gene which include RORyl and RORyt. "RORy modulator" refers to a chemical compound that inhibits, either directly or indirectly, the activity of RORy. RORy modulators include antagonists and inverse agonists of RORy.
"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.
"Substituted" in reference to a group indicates that one or more hydrogen atom attached to a member atom within the group is replaced with a substituent selected from the group of defined substituents. 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 and that is sufficiently robust to survive isolation from a reaction mixture). When it is stated that a group may contain one or more substituent, one or more (as appropriate) member atom within the group may be substituted. In addition, a single member atom within the group 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.
Compounds
The present invention provides, in a first aspect, a compound of Formula I or a
pharmaceutically acceptable salt thereof.
Figure imgf000005_0001
Formula I
wherein:
each Rl is selected from the group consisting of:
- halo;
- CN; - OH;
- C1-C3 alkoxy optionally substituted with one to three F; and
- C1-C3 alkyl optionally substituted with one to three F;
each R2 is selected from the group consisting of:
- halo;
- CN;
- OH;
- C1-C3 alkoxy optionally substituted with one to three F; and
- C1-C3 alkyl optionally substituted with one to three F;
m is 0, 1 or 2.
n is 0, 1 or 2.
R3 is H or Cl-C3 alkyl;
R4 is H or Cl-C3 alkyl;
R5 is selected from the group consisting of:
- C1-C6 alkyl optionally substituted with one to three F, OH or C1-C3 alkoxy; and
- NHRa wherein Ra is C1-C6 alkyl.
In one embodiment, the invention relates to the compounds of Formula I, wherein m is 0. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein m is 1.
In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein Rl is CI. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein Rl is F. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein Rl is CF3. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein Rl is CN.
In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein n is 0. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein n is 1. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein n is 2,
In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R2 is CI. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R2 is F. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R2 is methoxy. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R2 is methyl. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R2 is CF3. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R2 is (trifluoromethyl)oxy. fn one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R3 is H. fn one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R3 is CH3.
In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R4 is H. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R4 is C¾.
In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R5 is C1 -C3 alkyl. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R5 is ethyl. In one embodiment, this invention also relates to compounds of any of the above embodiments, wherein R5 is methyl.
The meaning of any functional group or substituent thereon at any one occurrence in Formula I, or any subformula thereof, is independent of its meaning, or any other functional group's or substituent's meaning, at any other occurrence, unless stated otherwise.
The compounds according to Formula I may contain one or more asymmetric center (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, such as chiral carbon atoms, 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 all individual stereoisomers 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 metliods 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. Likewise, 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. In certain other embodiments, compounds according to Formula I may contain a basic functional group. 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 may impart greater stability or solubility to the molecule thereby facilitating formulation into a dosage form. Accordingly, the invention is further directed to the use of pharmaceutically-acceptable salts of the compounds according to Formula I.
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. The invention also includes various deuterated forms of the compounds of Formula (I). Each available hydrogen atom attached to a carbon atom may be independently replaced with a deuterium atom. A person of ordinary skill in the art will know how to synthesize deuterated forms of the compounds of Formula (I). Commercially available deuterated starting materials may be employed in the preparation of deuterated forms of the compounds of Formula (I), or they may be synthesized using conventional techniques employing deuterated reagents (e.g. lithium aluminum deuteride).
The compounds of the invention may exist in solid or liquid form. In the solid state, the compounds of the invention may exist in crystalline or noncrystalline form, or as a mixture thereof. For compounds of the invention that are in crystalline form, the skilled artisan will appreciate that pharmaceutically-acceptable solvates may be formed wherein solvent molecules are incorporated into the crystalline lattice during crystallization. Solvates may involve nonaqueous solvents such as ethanol, isopropanol, DMSO, acetic acid, ethanolamine, and ethyl acetate, or they may involve water as the solvent that is incorporated into the crystalline lattice. Solvates wherein water is the solvent that is incorporated into the crystalline lattice are typically referred to as "hydrates." Hydrates include stoichiometric hydrates as well as compositions containing vaiable amounts of water. The invention includes all such solvates.
The skilled artisan will further appreciate that certain compounds of the invention that exist in crystalline form, including the various solvates thereof, may exhibit polymorphism (i.e. the capacity to occur in different crystalline structures). 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 arangement, 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 melting points, IR spectra, and X-ray powder diffraction patterns, 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 polymorphs. In addition, one polymorph may spontaneously convert to another polymorph under certain conditions.
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 scheme. 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 the 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.
Scheme 1
Figure imgf000010_0001
[Conditions: a) ethyl 2-cyanoacetate, sulfur, morpholine, EtOH, reflux, or ethyl 2-cyanoacetate, sulfur, morpholine, EtOH, acetic acid, 55 °C; b) KOH, EtOH, reflux; c) 2 M HC1; d) NaOH, ethanol, reflux; e) EDC, HOBt, DCM; f) substituted benzoyl chloride, tin(IV) chloride (or A1C13), DCE, reflux]
Scheme 1 represents a general reaction scheme for preparing compounds of Formula I.
Starting material substituted phenyl methyl ketones 1.1 can be reacted with ethyl 2-cyanoacetate and sulfur in the presence of morpholine to form thiophene esters 1.2, Deesterification of 1.2 provides thiohene amines 1.4, which can then be coupled with an appropriate acid (commercially available or can be made from commercially available starting materials using methods known to those skilled in the art) to afford thiophene amides 1.5. The acylation of 1.5 catalyzed by SnCl4 or A1C13 gives the desired compounds of Formula I. Examples
The following examples illustrate the invention. These examples are not intended to limit the scope of the present invention, but rather to provide guidance to the skilled artisan to prepare and use the compounds, compositions, and methods of the present invention. While particular embodiments of the present invention are described, the skilled artisan will appreciate that various changes and modifications can be made without departing from the spirit and scope of the invention.
Abbreviations
BOP benzotriazol e- 1 -yl-oxy-tris-(dimethylamino)-phosphonium hexafluorophosphate
DCE 1,2-dichloroethane
DCM dichloromethane
DIPEA diisopropylethylamine
DMF N./V-dimethylformarnide
DMSO dimethylsulphoxide
EA ethyl acetate
EDC N-(3-dimethylaminopropyl)-N-ethyIcarbodiimide hydrochloride
ES electrospray
HOBt hydroxybenzotriazole
LCMS liquid chromatography mass spectrometry
DAP mass directed automated preparative liquid chromatography.
MS mass spectrometry
wCPBA meta chloroperbenzoic acid
NMP N-methyl-2-pyrrolidone
PE petroleum ether
RT room temperature
sat. saturated
TFA trifluoroacetic acid
THF tetrahydrofuran
Chromatography
Unless stated otherwise, all chromatography was carried out using silica columns.
LCMS
1) Acidic condition:
Mobile phase: water containing 0.05 % TFA / acetonitrile
Column: XBridgeTM CI 8 30 x 100 mm - 5 microns
Detection: MS and photodiode array detector (PDA)
2) Basic condition:
Mobile phase: water containing 0.08 % NH4HCO3 / acetonitrile
Column: XBridgeTM CI 8 30 x 100 mm - 5 microns;
Detection: MS and photodiode array detector (PDA)
MDAP 1) acidic condition 1 :
Instrument: Waters instrument
Column: Sunfire Prep CI S column (5 um, 19 x 50 mm)
Mobile phase: water containing 0.05% TFA / acetonitrile.
2) acidic condition 2:
Instrument: Gilson GX-281
Column: Sunfire prep C18 OBD; 5 um, 100 mm * 30 mm;
Mobile phase: A: 0.05% TFA/H20; B: MeCN;
3) basic condition 1 :
Instrumnet: Waters instrument
Column: Xbridge Prep C18 column (5 um, 19 x 50 mm)
Mobile phase: water containing 0.04% ammonia/ acetonitrile.
4) basic condition 2:
Instrumnet: Gilson 281(PHG-005);
Column: Shimadzu PRC-ODS 20 x250 mm, 1 Sum two connected in series;
Mobile phase: A: 10 mM NH4HC03 B:MeCN;
5) basic condition 3:
Instrumnet: Gilson GX-281 ;
Column: Agela Durashell RP 21.5*250 mm 10 um;
Mobile phase: A: 0.04% NH3 H20/water; B: C¾CN;
Example 1
2-[4-(ethylsulfonyl)phenyl]-iV-[4-phenyl-5-(phenylcarbonyl)-2-thienyl]acetamide
Figure imgf000012_0001
Intermediate la: 4-(ethylsulfonyl phenyl]acetic acid
Step 1: A solution of sodium nitrite (18.4 g) in 133 mL of water was added dropwise at 0 °C, while stirring, to a suspension of (4-aminophenyl)acetic acid (40.2 g) in 133 mL of water and 54 mL of concentrated hydrochloric acid. After the addition was complete, the reaction mixture was stirred at the same temperature for 45 minutes. This solution of cold diazonium salt was then added dropwise at room temperature to a mixture of potassium ethylxanthate (49.4 g), 80 mL of water and 200 mL of 2 sodium carbonate solution. The mixture was heated to 45 °C and stirred at this temperature until gas evolution stops. After cooling to room temperature, pH was adjusted to 1 with concentrated hydrochloric acid and the oiled xanthogenate ester was extracted with ether. Solvent was evaporated to give (4-{[(ethyloxy)carbonothioyl]thio}phenyl)acetic acid (90 g) as a dark red liquid. MSiES"1) m/z 257 (MH+).
Step 2: (4-{[(Ethyloxy)carbonothioyl]thio}phenyl)acetic acid (90 g) was taken up in 340 mL of ethanol, and a solution of 70 g of potassium hydroxide in 340 mL of water was added. Boiling at reflux was effected for 20 hours. The major portion of ethanol was subsquently removed by the distillation under reduced pressure. The aqueous phase was cooled with ice, and acidified with concentrated hydrochloric acid while stirring. The obtained solution was extracted with diethyl ether (500 mL). The organic phase was washed with brine, dried over anhydrous sodium sulphate, filtered, and concentrated to affored (4-mercaptophenyl)acetic acid (33 g) as a yellow solid. MS(ES÷) m/z 169 (MH+).
Step 3: To a solution of (4-mercaptophenyl)acetic acid (33 g) in N,N-dimethylformamide (DMF) (240 mL) was added 2CO3 (108 g) and bromoethane (64.1 g). The reaction mixture was stirred at RT. After 2.5 hours, the starting material was totally consumed. The reaction mixture was partitioned between ethyl acetate (300 mL) and water (300 mL). The organic phase was washed with water (300 mL x 4) and brine (200 mL), dried over sodium sulphate, filtered, and concentrated to give ethyl [4-(ethyIthio)phenyl]acetate (34 g) as a pale yellow solid. MS(ES+) m/z 225 (MH+).
Step 4: A solution of ethyl [4-(ethylthio)phenyI]acetate (34 g) in dichloromethane (DCM) (500 mL) was cooled to 0 °C with an ice bath. mCPBA (78 g) was added in portions, and the reaction mixture was stirred at RT overnight. The obtained suspension was filtered. The filtrate was washed with sat. sodium carbonate solution (400 mL x 2), water (500 mL), then brine (250 mL). The obtained solution was dried over sodium sulphate, filtered, and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 0:1 to 1 :1) to afford ethyl [4- (ethylsulfonyl)phenyl]acetate (25 g) as a yellow liquid. MSfES*) m/z 257 (MH+).
Step 5: To a solution of ethyl [4-(ethylsulfonyl)phenyl]acetate (25 g) in ethanol (180 mL) was added a solution of NaOH (14.28 g) in water (180 mL). The reaction mixture was stirred at room temperature overnight. Ethanol was removed under reduced pressure, and 150 mL of water was added. The aqueous phase was washed with dichloromethane (100 mL x 2), and then acidified with 6 M HC1 to pH = 1. This solution was extracted with ethyl acetate (200 mL x 2). The combined organic phases were washed with brine (200 mL), dried over sodium sulphate, filtered, and concentrated to give the desired product as a dark red oil, which slowly solidified to give [4-(ethylsulfonyl)phenyl]acetic acid (20 g) as a yellow solid. 'H-NMR (400 MHz, DMSO-i¾ δ ppm 1.07 (t, 9.6 Hz, 3H), 3.26 (q, J= 9.6 Hz, 2H), 3.72 (s, 2H), 7.53 (d, J= 11.2 Hz, 2H), 7.81 (d, J= 1 1.2 Hz, 2H), 12.53 (s, 1H); MSiES*) m/z 229 (MH4).
Preparation of the final product
Step 1: To a round-bottomed two-necked flask was charged with 1 -phenylethanone (24.03 g), ethyl cyanoacetate (33.9 g), acetic acid (5.72 mL), morpholine (26.1 mL) and ethanol (50 mL). The mixture was stirred at 55 °C (oil bath temperature: 55 °C) overnight. Sulfur (9.62 g) was added. The reaction mixture was stirred at 55 °C (oil bath temperature: 55 °C) for another day. The solution was partitioned between DCM and water. The organic phase was washed with brine, and dried over Na2S04. After filtration, solvent was removed. The crude product was purified by flash column (EtOAc : PE = 0: 1 to 15:85) to give ethyl 2-amino-4-phenyl-3-thiophenecarboxylate (32.8 g). Ή- NMR (400 MHz, DMSO- ) 5 ppm 0.93 ppm (t, J= 7.2 Hz, 3H), 4.03 (q, J= 7.2 Hz, 2H), 6.06 (s, 1H), 7.27-7.37 (m, 5H); MS(ES+) m/z 248 (MH").
Step 2: Ethanol (33 mL) and NaOH (32.8 mL) were added to ethyl 2-amino-4-phenyl-3- thiophenecarboxylate (5.4 g). The mixture was heated to reflux (oil bath temperature: 100 °C) over 3 days. Water was added. DCM was added to extract the solution for 3 times. The combined organics were dried over Na2S04. After filtration and concentration, (4-phenyl-2-tliienyl)amine (3.5 g) was obtained.
Step 3: (4-Phenyl-2-thienyl)amine (530 mg), [4-(ethylsulfonyl)phenyl] acetic acid (intermediate l a, 690 mg), EDC (695 mg) and HOBt (555 mg) were added into a 10 mL vial. Dichloromethane (DCM) (15 mL) was added. The reaction mixture was stirred at RT overnight. DCM was removed. The obtained crude was purified by reversed column eluting with acetonitrile and water to afford 2- [4-(efliylsulfonyl)phenyl]-N-(4-phenyl-2-thienyl)acetamide (460 mg). MS(ES+) m/z 386 (MH4).
Step 4: To a solution of benzoyl chloride (0.061 mL) and 2-[4-(efhylsulfonyl)phenyl]-N-(4- phenyl-2-thienyI)acetamide (102 mg) in 1 ,2-dichloroethane (DCE) (4 mL) was added tin(IV) chloride (0.529 mL). The reaction mixture was heated to reflux (oil bath temperature: 92 °C). After 1 ,5 hours, water was added to quench the reaction. The solution was partitioned between DCM and water. The aqueous phase was washed with DCM for another 3 times. The combined organics were dried over Na2SC> . Filtration and evapouration afforded the crude product which was redissolved in DMF and submitted to MDAP to afford the desired product 2-[4-(ethylsulfonyI)phenyl]-N-[4-phenyl-5- (phenylcarbonyl)-2-thienyl]acetamide (68 mg) as a greenish solid. 'H-NMR (400 MHz, DMSO-rf6) δ ppm 1.04 (t, J= 7.3 Hz, 3H), 3.22 (q, 7.3 Hz, 2H), 3.88 (s, 2H), 6.77 (s, 1 H), 7.05-7.16 (m, 7H), 7.28 (d, J= 7.3 Hz, 1H), 7.35-7.40 (m, 2H), 7.55 (d, J= 8.3 Hz, 2H), 7.81 (d, J = 8.3 Hz, 2H);
MS(ES+) m/z 490 (MH+). Example 2
Ar-{4-(3-ch]orophenyl)-5-[(2-chlorophenyl)carbony]]-2-thienyl}-2-[4- (ethylsolfonyl)p enyl]acetamide
Figure imgf000015_0001
Step 1: A mixture of l-(3-chlorophenyl)ethanone (30 g), ethyl 2-cyanoacetate (65.9 g), sulfur (8.09 g) and morpholine (33.8 g) in ethanol (340 mL) was heated to reflux and stirred overnight. Solvent was removed, and the residue was purified by flash chromatography (silica gel, PE : EtOAc 20: 1 to 10: 1) to give ethyl 2-amino-4-(3-chlorophenyl)- thiophene-3-carboxylate (15 g) as a yellow solid. MS(ES+) m/z 282 (MH+).
Step 2: A solution of KOH (50.8 g) was added to a solution of ethyl 2-amino-4-(3- chlorophenyl)thiophene-3-carboxylate (15 g) in ethanol (200 mL). Then the reaction mixture was heated to reflux for 20 hours. The solution was cooled to room temperature and concentrated. To the residue was added water (150 mL), and then the solution was acidified to pH ~ 7 with 4 M HCl, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2-amino-4-(3-chlorophenyl)thiophene-3-carboxylic acid (11 g) as a beige solid. MS(ES+) m/z 254 (MH ).
Step 3: To a solution of 2-amino-4-(3-chlorophenyl)fhiophene-3-carboxylic acid (11 g) in etlianol (150 mL) was added 2 M HCl (92 mL) solution, and the reaction mixture was stirred at room temperature for 2 hours. Solvent was removed in vacuo, and the residue was triturated with diethyl ether to give 4-(3-chlorophenyl)tniophen-2-amine hydrochloride (7.3 g) as a beige solid. MS(ES+) m/z 210 (MH+).
Step 4: To a solution of 4-(3-chlorophenyl)thiophen-2-amine hydrochloride (6 g), 2-(4- (ethylsulfonyl)phenyl)acetic acid (intermediate la, 6.51 g), EDC (6.31 g) and HOBt (4.37 g) in dichloromethane (DCM) (90 mL) was added dropwise DIPEA (7.66 mL) at room temperature. The reaction mixture was heated at reflux under nitrogen overnight. The reaction mixture was partitioned between DCM (150 mL) and water (80 mL).The organic phase was washed with water (50 mL x 2), brine (50 mL), dried over anhydrous sodium sulfate, and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1:3 to 1 : 1) to give N-(4-(3-chlorophenyl)thiophen- 2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (7 g) as a pale brown solid. MStES*) m/z 420 (MH ). Step 5: To a solution of N-(4-(3-chlorophenyl)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)acetamide (5 g) and 2-chlorobenzoyl chloride (4.17 g) in 1,2-dichloroethane (DCE) (100 mL) was added dropwise tin(IV) chloride (23.81 mL) at 0 °C, and then the reaction mixture was heated to reflux for 3 hours. The reaction mixture was diluted with DCM (50 mL), and the organic phase was washed with water (100 mL). The aqueous layer was extracted with DCM (30 mL x 3). The combined organic phases were dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1 : 1 to EtOAc : PE : THF = 5:5:2) to give the crude product, which was further purified by preparative HPLC to afford N-(5-(2-chlorobenzoyl)-4-(3-chlorophenyl)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)acetamide (1.9 g) as a white solid. Ή-NMR (400 MHz, DMSO-i¾) 5 ppm 1.11
(t, 7.2 Hz, 3H), 3.30 (q, J= 7.2 Hz, 2H), 3.95 (s, 2H), 6.76 (s, 1H), 7.16-7.31 (m, 8H), 7.61 (d, J= 8.0 Hz, 2H), 7.86 (d, J= 8.0 Hz, 2H), 12.16 (s, 1H); MS(ES^) m/z 558 (MH4).
Example 3
iV-(5-(2-chlorobenzoyl)-4-(3-c anophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl) phenyl) acetamide
Figure imgf000016_0001
Step 1: A solution of l-(3-bromophenyl)ethanone (40 g), ethyl 2-cyanoacetate (34.1 g), morpholine (35.0 g) and sulfur (10.27 g) in ethanol (50 mL) was stirred at 105 °C for 14 hours.
Solvent was removed in vacuo, and the residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 :9) to give ethyl 2-amino-4-(3-bromophenyl)thiophene-3-carboxylate (20 g) as a yellow solid. MS(ES") m/z 326 (MH ).
Step 2: To a solution of ethyl 2-amino -(3-bromophenyl)thiophene-3-carboxylate (17 g) in ethanol (100 mL) was added a solution of potassium hydroxide (1 1.70 g) in water (100 mL). The reaction mixture was stirred under reflux (oil bath temperature: 105 °C) overnight. Solvent was removed in vacuo. The residue was dissolved in water (200 mL), and cone. HCI was added dropwise to adjust pH to 7. The solid was collected by filtration to give 2-amino-4-(3-bromophenyl)thiophene- 3-carboxylic acid as a black solid. MSiES4) m/z 428 (MH^).
Step 3: To a solution of 2-amino-4-(3-bromophenyl)thiophene-3-carboxylic acid (20 g) in ethanol (50 mL) stirred at room temperature in air was added 2 M HCI (20 mL) solution in one charge. The reaction mixture was stirred at 20 °C for 2 hours. Solvent was removed in vacuo, and the residue was triturated with ether to give the crude 4-(3-bromophenyl)thiophen-2-amine hydrochloride (13 g) as a grey solid. MS^S") m/z 254 (Ivffif).
Step 4: A suspension of 4-(3-bromophenyl)thiophen-2-amine hydrochloride (18 g), 2-(4- (ethylsulfonyl)phenyl) acetic acid (intermediate la, 16.97 g), (lH-benzo[ci][l,2,3]triazol-l-yloxy)- tris(dimethylamino)phosphonium hexafluorophosphate(V) (54.8 g) in DMF (20 mL) was stirred at 50 °C overnight. Most of solvent was removed in vacuo, and the residue was poured into water (250 mL). The product was extracted with ethyl acetate (130 mL), and the organic layer was washed with brine (130 mL x 3), dried over anhydrous sodium sulfate, filtered and concentrated. Purification by flash chromatography (silica gel, EtOAc ; PE = 1 : 1) gave N-(4-(3-bromophenyl)thiophen-2-yl)-2-(4- (ethylsuIfonyl)phenyl)acetamide (20 g) as a blue solid. MSfES^) m/z 464 (MH+).
Step 5: A suspension of N(4-(3-bromophenyl)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)acetamide (1.2 g) and cyanocopper (0.477 g) in N-methyI-2-pyrrolidone (ΝΜΡ) (12 mL) was stirred at 190 °C for 10 hours. After cooling down to RT, the solid was removed by filtration. The filtrate was poured into water (150 mL), and the mixture was extracted with ethyl acetate (100 mL). The organic layer was washed with brine, dried over anhydrous sulfate, filtered and concentrated. Purification via flash chromatography (silica gel, EtOAc) gave N-(4-(3- cyanophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (450 mg) as a brown solid.
MS(ES+) m/z 414 (MH+).
Step 6: To a solution of N-(4-(3-cyanophenyl)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)acetamide (368 mg) and 2-chlorobenzoyl chloride (314 mg) in 1,2- dichloroethane (DCE) (6 mL) was added tin(IV) chloride (0.210 mL), The reaction mixture was heated to reflux (oil bath temperature: 92 °C) for 80 mins. After cooling to RT, the mixture was poured into water (50 mL), and then extracted with DCM (50 mL). The organic layer was dried over anhydrous sulfate, filtered and concentrated. Purification by flash chromatography (silica gel, EtOAc : PE = 1 : 1) gave the crude product (250 mg) as a yellow solid. Purification via HPLC gave N-(5-(2- chlorobenzoyl)-4-(3-cyanophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (82 mg) as a yellow solid. lH-NMR (400 MHz, DMSO-rf6) δ ppm 1.31 (t, J= 7.2 Hz, 3H), 3.28 (q, J= 7.2 Hz, 2H), 3.96 (s, 2H), 6.79 (s, 1H), 7.20-7.42 (m, 5H), 7.56-7.65 (m, 5H), 7.87 (d, J= 8.0 Hz, 2H), 12.1 (s, 1H); MS(ES+) m/z 549 (MlT).
Example 4
jV-{4-(3-chlorophenyl)-5-[(3-fluorophenyl)carbonyl]-2-thienyl}-2-[4- (ethylsulfonyl)phenyl] acetamide
Figure imgf000018_0001
To a solution of N-(4-(3-chlorophenyl)miophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (200 mg, see step 4 for synthesis of Example 2) and 3-fluorobenzoyl chloride (151 mg) in 1 ,2- dichloroethane (DCE) (16 mL) was added dropwise tin(IV) chloride (1 M in DCM, 0.953 mL). The reaction mixture was heated to reflux overnight. The reaction mixture was diluted with DCM (50 mL), and then washed with water (20 mL). The aqueous phases were extracted with DCM (20 mL). The combined organic phase was dried over anhydrous sodium sulfate and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1 : 1 to EtOAc : PE : THF = 5:5:2) to give the crude product, which was further purified by preparative HPLC to afford N-{4-(3- chlorophenyl)-5-[(3-fluorophenyl)carbonyl]-2-thienyl}-2-[4-(ethylsulfonyl)phenyl]acetamide (15 mg) as a white solid. Ή-NMR (400 MHz, DMSO-ifc) δ ppm 1.11 (t, J= 7.6 Hz, 3H), 3.32 (q, J= 7.6 Hz, 2H), 3.97 (s, 2H), 6.86 (s, 1H), 7.18-7.25 (m, 8H), 7.62 (d, J= 8.4 Hz, 2H), 7.87 (d, J= 8.4 Hz, 2H), 12.20 (s, 1H); MS(ES ) mfx 542 (Mrf).
Example 5
A'-{4-(3-chIorophenyl)-5-[(2-chloropheriyl)carbonyl]-2-thienyl}-2-[4- (methylsulfonyl)phenyl]acetamide
Figure imgf000018_0002
Step 1: To a solution of 4-(3-chlorophenyl)thiophen-2-amine hydrochloride (0.50 g, see step 3 for synthesis of Example 2), 2-(4-(methylsulfonyI)phenyl)acetic acid (0.46 g), EDC (0.62 g) and HOBt (0.43 g) in dichloromethane (DCM) (20 mL) was added dropwise DIPEA (0.75 mL) at room temperature. The reaction mixture was heated at reflux under nitrogen overnight. The reaction mixture was partitioned between DCM (60 mL) and water (30 mL). The organic phase was washed with water (20 mL x 2), brine (20 mL), dried over anhydrous sodium sulfate, and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1:3 to 1 : 1) to give N-(4-(3- chloropbenyl)thiophen-2-yl)-2-(4-(methylsulfonyl)phenyl)acetarnide (0.40 g) as a pale brown solid. MS(ES+) m/z 406 (MH+).
Step 2: To a solution of N-(4-(3-chlorophenyl)thiophen-2-yl)-2-(4-(methylsulfonyl)phenyl)- acetamide (200 mg) and 2-chIorobenzoyl chloride (172 mg) in 1 ,2-dichloroethane (DCE) (16 mL) was added tin(IV) chloride (0.985 mL). The reaction mixture was heated to reflux for 2 hours. The reaction mixture was diluted DCM (50 mL), and then washed with water (20 mL). The aqueous phase was extracted with DCM (20 mL). The combined organic phases were dried over anhydrous sodium sulfate and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1 : 1 to EtOAc : PE : THF = 5:5:1) to give the crude product, which was further purified by preparative HPLC to afford N- {4-(3-chlorophenyl)-5-[(2-chlorophenyl)carbonyl]-2-thienyl}-2-[4- (methylsulfonyl)phenyl]acetamide (50 mg) as a white solid. ¾-NMR (400 MHz, DMSO-t?6) δ ppm 3.21 (s, 3H), 3.95 (s, 2H), 6.76 (s, 1H), 7.18-7.26 (m, 8H), 7.60 (d, /= 8.4 Hz, 2H), 7.91 (d, J= 8.4 Hz, 2H), 12.16 (s, 1H); MS(ES^) mJz 544 (MH+).
Example 6
Ar-{4-(3-cyanophenyI)-5-[(3-fluorophenyl)carbonyI]-2-thienyl}-2-[4- (ethylsulfonyl)phenyl]acetamide
Figure imgf000019_0001
To a solution of N-(4-(3-cyanophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (310 mg, see step 5 for synthesis of Example 3) and 3-fluorobenzoyl chloride (342 mg) in 1,2- dichloroethane (DCE) (16 mL) was added tin(IV) chloride (0.177 mL). The reaction mixture was stirred at reflux for 3 hours. The mixture was cooled to room temperature, poured into water (50 mL), and the solution was extracted with DCM (100 mL). The organic layer was washed with brine, dried over anhydrous sodium sulfate, and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 :1) to give the crude product (103 mg), which was further purified by preparative HPLC to give N-{4-(3-cyanophenyl)-5-[(3-fluorophenyl)carbonyl]-2-thienyl}-2-[4-
(ethylsulfonyl)phenyl]acetamide (72 mg) as a yellow solid. Ή-NMR (400 MHz, DMSO-(¾) δ ppm 1.10 (t, = 7.6 Hz, 3H), 3.29 (q, J= 7.6 Hz, 2H), 3.96 (s, 2H), 6.87 (s, 1H), 7.18-7.26 (m, 4H), 7.39 (t, J= 8.0 Hz, 1H), 7.56 (d, J- 8.0 Hz, 1H), 7.62-7.69 (m, 4H), 7.87 (d, /= 8.4Hz, 2H), 12.18 (s, 1H); MSiES") m/z 533 (MH+). Example 7
Af-[5-[(2-chlorophenyl)carbonyl]-4-(3-cyanophenyl)-2-thienyl]-2-[4- (methylsulfonyI)phenyI]acetamide
Figure imgf000020_0001
Step 1: A suspension of 4-(3-bromophenyl)thiophen-2-amine hydrochloride (1.1 g, see step 3 for synthesis of Example 3), 2-(4-(methylsulfonyl)-phenyl)acetic acid (0.98 g) and (1H- benzo[^[l,2,3]triazoI-l-yloxy)tris(dimethylamino)- phosphonium exafluorophosphate (V) (3.35 g) in DMF (20 mL) was stirred at 50 °C under nitrogen overnight. The mixture was poured into water (250 mL), and the solution was extracted with ethyl acetate (130 mL). The organic layer was washed with brine (130 mL x 3), dried over anhydrous sodium sulfate, and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 : 1) to give N-(4-(3- bromophenyl)thiophen-2-yl)-2-(4-(methylsuIfonyl)phenyl)acetamide (1.2 g) as a blue solid. MSiES^ m/z 450 (ΜΗΓ).
Step 2: A suspension of N-(4-(3-bromophenyl)thiophen-2-yl)-2-(4- (metliylsulfonyl)phenyl)acetamide (1.2 g) and cyanocopper (0.477 g) in N-methyl-2-pyrrolidone (ΝΜΡ) (12 mL) was stirred at 190 °C for 10 hours. After the reaction was complete, the mixture was cooled to room temperature and poured into water (150 mL). The solution was extracted with ethyl acetate (100 mL). The organic layer was washed with brine, dried over anhydrous sulfate, and concentrated. Purification by flash chromatography (silica gel, EtOAc) gave N-(4-(3- cyanophenyI)thiophen-2-yl)-2-(4-(methylsulfonyl)phenyl)acetamide (450 mg) as a brown solid. MS(ES+) m z 414 (MH+).
Step 3: To a solution of N-(4-(3-cyanophenyl)thiophen-2-yl)-2-(4-(methylsulfonyl)- phenyl)acetamide (153 mg) and 2-chlorobenzoyl chloride (270 mg) in 1 ,2-dichloroethane (DCE) (6 mL) was added tin(IV) chloride (1 mL). The reaction mixture was stirred at reflux for 1 hour. After the reaction was complete, the mixture was poured into water (40 mL). The solution was extracted with DCM (70 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 3:2) to give the crude product, which was further purified by preparative HPLC to give N-(5-(2-chlorobenzoyl)-4-(3- cyanophenyl)thiophen-2-yl)-2-(4-(methylsulfonyl)phenyl)acetamide (68 mg) as a yellow solid. ¾- NMR (400 MHz, DMSO-£½) δ ppm 3.21 (s, 3H), 3.95 (s, 2H), 6.79 (s, 1H), 7.19-7.23 (m, 2H), 7.26- 7.29 (m, 1H), 7.33-7.36 (m, 1H), 7.40 (t, J- 8.0 Hz, 1H), 7.55-7.65 (m, 5H), 7.91 (d, J= 8.4 Hz, 2H), 12.20 (s, 1H); MS(ES+) mfz 535 (MH*).
Example 8
iV-{4-(3-cyanophenyl)-5-[(3-fluorophenyl)carbonyl]-2-thienyl}-2-[4- (methylsulfonyl)phenyl]acetamide
Figure imgf000021_0001
To a solution of N-(4-(3-cyanophenyl)thiophen-2-yl)-2~(4-(methylsuIfonyl)phenyl)acetamide (310 mg, see step 2 for synthesis of Example 7) and 3-fluorobenzoyl chloride (342 mg) in 1 ,2- dichloroethane (DCE) (16 mL) was added tin(IV) chloride (0.177 mL). The reaction mixture was stirred at reflux for 3 hours. The mixture was cooled to room temperature rapidly and poured into water (50 mL). The solution was extracted with DCM (100 mL). The organic layer was washed with brine, dried over anhydrous sodium sulfate, and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 : 1) to give the crude product (103 mg), which was further purified by preparative HPLC to give N-(4-(3-cyanophenyl)-5-(3-fluorobenzoyl)thiophen-2-yl)-2-(4- (methyIsulfonyl)phenyl)acetamide (72 mg) as a yellow solid. Ή-NMR (400 MHz, DMSO-rf6) δ ppm 3.22 (s, 3H), 3.95 (s, 2H), 6.87 (s, 1H), 7.18-7.27 (m, 4H), 7.39 (t, J= 8.0 Hz, 1H), 7.50-7.69 (m, 5H), 7.91 (d, 7= 8.0 Hz, 2H), 12.18 (s, 1H); MS(ES^) m/z 519 (MH+).
Example 9
7Y-{4-(3-chlorophenyl)-5-[(3-fluorophenyI)carbonyl]-2-thienyl}-2-[4- (methylsulfonyl)phenyl]acetamide
Figure imgf000021_0002
To a solution of N-(4-(3-chlorophenyl)thiophen-2-yl)-2-(4-(methylsuIfonyl)phenyl)acetamide (340 mg, see step 1 for synthesis of Example 5) and 3-fluorobenzoyl chloride (266 mg) in 1 ,2- dichloroethane (DCE) (20 mL) was added dropwise tin(IV) chloride (1.675 mL) at room temperature. After stirring under reflux overnight, the reaction mixture was diluted with DCM (50 mL), and then washed with water (20 mL). The aqueous phase was extracted with DCM (20 mL). The combined organic phases were dried over anhydrous sodium sulfate and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE - 1: 1 to EtOAc : PE : THF = 5:5:1) to give the crude product, which was further purified by preparative HPLC to afford N-{4-(3-chlorophenyl)-5- [(3-fluorophenyI)carbonyl]-2-thienyl}-2-[4-(memylsulfonyl)phenyl]acetamide (25 mg) as a yellow solid. Ή-NMR (400 MHz, DMSO-< ) δ ppm 3.22 (s, 3H), 3.96 (s, 2H), 6.85 (s, 1H), 7.18-7.25 (m, 8H), 7.62 (d, J= 8.4 Hz, 2H), 7.87 (d, J= 8.4 Hz, 2H), 12.14 (s, 1H); MSfES^ m/z 528 (MH^.
Example 10
N-{4-(3-chIorophenyl)-5-[(4-fluorophenyl)carbonyl]-2-thienyl}-2-[4- (ethylsulfonyl)phenyl] acetatnide
Figure imgf000022_0001
To a solution of N-(4-(3-chlorophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (0.3 g, see step 4 for synthesis of Example 2) and 4-fluorobenzoyl chloride (0.227 g) in 1,2- dichloroethane (DCE) (20 mL) was added tin(IV) chloride (1.43 mL). The reaction mixture was heated to reflux overnight. The reaction mixture was diluted with DCM (50 mL), and then washed with water (20 mL). The aqueous phase was extracted with DCM (20 mL). The combined organic phases were dried over anhydrous sodium sulfate and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1 : 1 to EtOAc : PE : THF = 5:5:1) to give the crude product, which was further purified by preparative HPLC to afford N-{4-(3-chlorophenyl)-5-[(4- fluorophenyl)carbonyl]-2-thienyl}-2-[4-(ethylsulfonyl)phenyl]acetamide (42 mg) as a white solid. !H- NMR (400 MHz, DMSO-</6) δ ppm 1.1 (t, J- 7.2 Hz, 3H), 3.30 (q, J= 7.2 Hz, 2H), 3.96 (s, 2H) ,
6.85 (s, 1H), 7.02-7.07 (m, 2H), 7.17-7.26 (m, 4H), 7.49-7.52 (m, 2H), 7.61 (d, J= 8.0 Hz, 2H), 7.87 (d, J= 8.0 Hz, 2H), 12.11 (s, IH); MS^S") m/z 542 (MH+).
Example 1 7V-(4-(3-chIorophenyI)-5-{[2-(trifluoromethyl)phenyl]carbonyl}-2-thienyl)-2-[4- (ethylsulfonyl)phenyl] acetamide
Figure imgf000023_0001
To a solution of 2-(trifluoromethyl)benzoyl chloride (795 mg) and N-(4-(3- chlorophenyl)thiophen-2-yl)-2-(4-(ethy]sulfonyl)phenyI)acetamide (1.6 g, see step 4 for synthesis of Example 2) in 1 ,2-dichloroethane (DCE) (16 mL) was added tin(IV) chloride (2.0 mL). The reaction mixture was stirred at reflux for 2 hours. The mixture was cooled to room temperature and poured into water (70 mL). The solution was extracted with DCM (200 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography {silica gel, EtOAc : PE = 1 : 1 ) to give the crude product, which was further purified by preparative HPLC to give N-(4-(3-chlorophenyl)-5-(2- (trifluoromethyI)benzoyl)thiophen-2-yl)-2-(4- {ethylsulfonyl)phenyl)acetamide (73 mg) as a yellow solid. Ή-NMR (400 MHz, DMSOn¾ 6 ppm 1.10 (t, J= 7.2 Hz, 3H), 3.30 (q, J= 7.2 Hz, 2H), 3.95 (s, 2H), 6.77 (s, 1H), 7.12 (s, 1H), 7.15-7.17 (m, 1H), 7.20-7.24 (m, 2H), 7.35-7.51 (m, 3H), 7.60 (d, J= 7.6 Hz, 2H), 7.68 (d, J= 7.6 Hz, 1H), 7.86 (d, J= 7.6 Hz, 2H), 12.19 (s, 1H); MS(ES+) m/z 592 (MH*).
Example 12
iV-{4-(3-chlorophenyl)-5-[(3-chlorophenyl)carbonyl]-2-thienyl}-2-[4- (ethylsulfony phenylJacetamide
Figure imgf000023_0002
To a solution of N-(4-(3-chlorophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (0.2 g, see step 4 for synthesis of Example 2) and 3-chlorobenzoyl chloride (0.167 g) in 1,2- dichloroethane (DCE) (16 mL) was added dropwise tin(IV) chloride (0.953 mL) at 0 °C. Then the reaction mixture was heated to reflux for 3 hours. The reaction mixture was diluted with DCM (50 mL), and then washed with water (20 mL). The aqueous phase was extracted with DCM (20 mL). The combined organic phases were dried over anhydrous sodium sulfate and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1: 1 to EtOAc : PE : THF = 5:5: 1) to give the crude product, which was further purified by preparative HPLC to afford N-{4-(3- chIorophenyl)-5-[(3-chlorophenyl)carbonyl]-2-thienyl}-2-[4-(ethylsulfonyl)phenyl]acetamide (30 mg) as a yellow solid. Ή-NMR (400 MHz, DMSO-rf6) δ ppm 1.11 (t, J= 7.2 Hz, 3H), 3.30 (q, J= 7.2 Hz, 2H), 3.96 (s, 2H) , 6.85 (s, 1H), 7.17-7.38 (m, 8H), 7.62 (d, J~ 8.0 Hz, 2H), 7.88 (d, J= 8.0 Hz, 2H), 12.16 (s, 1H); MS(ES+) m z 558 (MH ).
Example 13
iV-{4-(3-chlorophenyI)-5-[(2-fluorophenyI)carbonyI]-2-thienyl}-2-[4- (ethylsulfonyI)phenyl]acetamide
Figure imgf000024_0001
To a solution of N-(4-(3-chlorophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (760 mg, see step 4 for synthesis of Example 2) in 1,2-dichloroethane (DCE) (10 mL) cooled at 0 °C in an ice-water bath was added 2-fluorobenzoyl chloride (574 mg) and perchlorostannane (943 mg). The reaction mixture was stirred at 92 °C for 2 hours. After the reaction was complete, the mixture was cooled to room temperature, poured into water (50 mL), and extracted with DCM (50 mL). The organic layer was washed with brine, dried over anhydrous sodium sulfate, and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE - 3:2) to give the crude product (122 mg) as a yellow solid. Further purification by preparative HPLC gave N-{4-(3-chlorophenyl)-5- [(2-fluorophenyl)carbonyl]-2-thienyI} -2-[4-(ethylsulfonyl)phenyl]acetamide (73 mg). Ή-NMR (400 MHz, DMSO-O 5 ppm 1.10 (t, J= 7.2 Hz, 3H), 3.29 (q, J= 7.2 Hz, 2H), 3.96 (s, 1H), 6.78 (s, 1H), 6.93 (1, 7= 9.6 Hz, 1H), 7.06 (t, 7= 7.2 Hz, 1H), 7.17-7.24 (m, 4H), 7.31-7.36 (m, 2H), 7.61 (d, J= 8.0 Hz, 2H), 7.87 (d, J= 8.0 Hz, 2H), 12.15 (s, 1H); MS(ES+) m/z 542 (MH+).
Example 14
7V-[4-(3-chlorophenyl)-5-(phenylcarbonyl)-2-thienyI]-2-[4-(ethylsulfonyI)phenyl]acetamide
Figure imgf000025_0001
To a solution of N-(4-(3-chlorophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)- phenyl)acetamide (200 mg, see step 4 for synthesis of Example 2) and benzoyl chloride (134 mg) in 1 ,2-dichloroethane (DCE) (20 mL) was added tin(IV) chloride (0.953 mL) at RT. The reaction mixture was heated to reflux overnight. The reaction mixture was diluted with DCM (50 mL), and then washed with water (20 mL), The aqueous phase was extracted with DCM (20 mL). The combined organic phases were dried over anhydrous sodium sulfate and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1 :1 to EtOAc : PE : THF = 5:5:1) to give the crude product, which was further purified by preparative HPLC to afford N-[4-(3-chlorophenyl)-5-(phenylcarbonyl)- 2-thienyl]-2-[4-(ethylsulfonyl)phenyl]acetamide (24 mg) as a yellow solid. [H-NMR (400 MHz,
DMSO-i ) δ ppm 1.11 (t, J= 7.2 Hz, 3H), 3.30 (q, J= 7.2 Hz, 2H), 3.96 (s, 2H) , 6.85 (s, 1H), 7.19- 7.26 (m, 6H), 7.38-7.47 (m, 3H), 7.62 (d, J= 8.0 Hz, 2H), 7.88 (d, J= 8.0 Hz, 2H), 12.11 (s, 1H); MS(ES+) w/z 524 (MH+).
Example 15
Af-{5-[(2,6-dichlorophenyl)carbon l]-4-phenyl-2-thienyl}-2-[4-(ethylsulfonyl)phenyl]acetamide
Figure imgf000025_0002
To a solution of 2-[4-(ethylsulfonyl)phenyl]-N-(4-phenyl-2-thienyl)acetamide (200 mg, see step 3 for synthesis of Example 1) and 2,6-dichlorobenzoyl chloride (217 mg) in 1 ,2-dichloroethane (DCE) (14 mL) was added dropwise tin(IV) chloride (1.038 mL) at 0 °C. Then the reaction mixture was heated to reflux for 3 hours. The reaction mixture was diluted with DCM (50 mL), and then washed with water (20 mL). The aqueous layer was extracted with DCM (20 mL). The combined organic phase was dried over anhydrous sodium sulfate and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1 :1 to EtOAc : PE : THF = 5:5:1) to give the crude product, which was further purified by preparative HPLC to afford N-{5-[(2,6-dichlorophenyI)carbonyl]-4- phenyl-2-thienyl}-2-[4-(ethylsulfonyl)phenyl]acetamide (28 mg) as a yellow solid. 'H-NMR (400 MHz, DMSO-i/6) δ ppm 1.11 (t, J= 7.2 Hz, 3H)} 3.30 (q, J= 7.2 Hz, 2H), 3.96 (s, 2H) , 6.69 (s, IH), 7.08-7.28 (m, 8H), 7.61 (d, J= 8.4 Hz, 2H), 7.87 (d, J= 8.0 Hz, 2H), 12.21 (s, IH); MS(ES") m/z 558
(MH+).
Example 16
A'-[4-(3-cyanophenyl)-5-(phenylcarbonyl)-2-thienyl]-2-[4-(ethyIsulfonyl)phenyl]acetamide
Figure imgf000026_0001
To a solution of N-(4-(3-cyanophenyl)thiophen-2-yl)-2-(4-(ethyIsulfonyl)phenyl)acetamide (260 mg, see step 5 for synthesis of Example 3) in 1,2-dichloroethane (DCE) (16 mL) in ice-water bath was added benzoyl chloride (89 mg) and tin(IV) chloride (165 mg). The reaction mixture was stirred at 92 °C for 1.5 hours. The mixture was cooled to room temperature, poured into water (50 mL), and then extracted with DCM (50 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. Purification by flash chromatography (silica gel, EtOAc : PE = 3:2) gave the crude compound (106 mg), which was further purified by preparative HPLC to giveN-[4-(3- cyanophenyl)-5-(phenylcarbonyl)-2-thienyl]-2-[4-(ethylsulfonyl)phenyl]acetamide (57 mg) as a yellow solid. Ή-NMR (400 MHz, DMSO-rf6) δ ppm 1.10 (t, J = 7.2 Hz, 3H), 3.29 (q, J= 7.2 Hz, 2H), 3.96 (s, 2H), 6.88 (s, IH), 7.24 (t, J= 7.6 Hz, 2H), 7.36-7.46 (m, 4H), 7.55-7.86 (m, 5H), 7.87 (d, J= 8.4 Hz, 2H), 12.13 (s, IH); MSiES^ w/z 515 (MH+).
Example 17
iV-{5-[(2-chlorophenyl)carbon I]-4-phenyl-2-thienyl}-2-[4-(ethylsulfonyl)phenyl]acetamide
Figure imgf000026_0002
To a solution of 2-[4-(ethyIsulfonyl)phenyl]-N-(4-phenyI-2-thienyl)acetamide (150 mg, see step 3 for synthesis of Example 1) and 2-chlorobenzoyl chloride (136 mg) in 1,2-dichloroethane (DCE) (14 mL) was added dropwise tin(IV) chloride (0.78 mL) at 0 °C. The reaction mixture was heated to reflux for 3 hours. The reaction mixture was diluted with DCM (50 mL), and the organic phase was washed with water (30 mL). The aqueous layer was extracted with DCM (30 mL x 3). The combined organic phases were dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE - 1 : 1 to EtOAc : PE : THE = 5:5:2) to give the crude product, which was further purified by preparative HPLC to afford N-(5-(2- chIorobenzoyl)-4-phenylthiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (29 mg) as a yellow solid. Ή-NM (400 MHz, DMSO-t¾) δ ppm 1.11 (t, 7= 7.2 Hz, 3H), 3.30 (q, J= 7.2 Hz, 2H), 3.95 (s, 2H), 6.75 (s, 1H), 7.17-7.26 (m, 9H), 7.61 (d, J= 8.0 Hz, 2H), 7.87 (d, J= 8.0 Hz, 2H), 12.14 (s, 1H); MS(ES+) m/z 524 (MH+).
Example 18
/V-[4-(4-chlorophenyl)-5-(phenylcarbonyl)-2-thienyl]-2-[4-(ethylsuIfonyl)phenyI]acetamide
Figure imgf000027_0001
Step 1: A suspension of 1 -(4-chlorophenyl)ethanone (5.0 g), ethyl 2-cyanoacetate (5.4 g), morpholine (5.6 g) and sulfur (1.3 g) in ethanol (50 mL) was stirred at 105 °C under nitrogen for 14 hours. Solvent was removed in vacuo, and the residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 :9) to give ethyl 2-amino-4-(4-chlorophenyl)thiophene-3-carboxylate (2.2 g) as a yellow solid. MSiES4} m/z 282 (MH+).
Step 2: To a solution of ethyl 2-amino-4-(4-chlorophenyl)thiophene-3-carboxylate (2.2 g) in ethanol (100 mL) was added potassium hydroxide (1.7 g) in water (100 mL). The reaction mixture was stirred at 105 °C overnight. Solvent was removed in vacuo. To the residue was added water (100 mL), and then the solution was acidified to pH ~ 7 with 2 M HC1, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2- amino-4-(4-chlorophenyl)-thiophene-3-carboxylic acid (1.9 g). MS(ES+) m/z 254 (MH+).
Step 3: To a solution of 2-amino-4-(4-chlorophenyl)thiophene-3-carboxylic acid (1.9 g) in ethanol (50 mL) stirred in air at room temperature was added a solution of hydrochloric acid (2 M, 10 mL) in one charge. The reaction mixture was stirred at 20 °C for 2 hours. Solvent was removed in vacuo, and the residue was triturated with ether to give 4-(4-chlorophenyl)thiophen-2-amine hydrochloride (1.7 g) as a grey solid. MS(ES+) m/z 210 (MH+). Step 4: A suspension of 4-(4-chlorophenyl)thiophen-2-amine hydrochloride (2.2 g), 2-(4- (ethylsulfonyl)phenyl)acetic acid (intermediate la, 2.0 g) and BOP reagent (4.7 g) in DMF (8 mL) was stirred at 50 °C under nitrogen overnight. The mixture was poured into water (300 mL), and the solution was extracted with ethyl acetate (150 mL). The organic layer was washed with brine (200 mL x 3), dried over anhydrous sodium sulfate, and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc) to give N-(4-(4-chlorophenyl)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)acetamide (2.7 g) as a black solid. MS(ES"* ;w/z 420 (MH").
Step 5: To a solution of N-(4-(4-chlorophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)- phenyl)acetamide (390 mg) and benzoyl chloride (261 mg) in 1 ,2-dichloroethane (DCE) (16 mL) was added tin(iV) chloride (0.22 mL). The reaction mixture was stirred at reflux 1.5 hours. After cooling to room temperature, the mixture was poured into water (50 mL), and the solution was extracted with DCM (150 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 :1) to give the crude, which was further purified by preparative HPLC to give N-(5-benzoyl-4-(4-chlorophenyl)- thiophen-2-yl)-2- (4-(ethylsulfonyl)phenyl)acetamide (90 mg) as a yellow solid. 'H-NMR (400 MHz, DMSO-<¾) δ ppm
I.10 (t, J= 7.6 Hz, 3H), 3.29 (q, J= 7.6 Hz, 2H,), 3.85 (s, 1H), 6.92 (d, J= 2.0 Hz, 1H), 7.16 (d, J= 2.0 Hz, 1H), 7.48 (m, 2H), 7.61 (d, J= 8.4 Hz, 2H), 7.70 (d, J= 2.0 Hz, 1H), 7.86 (d, J= 8.4 Hz, 2H),
I I .60 (s, 1H); MS(ES+) m/z 524 (MH+).
Example 19
Ar-{4-(4-chlorophenyl)-5-[(2-chlorophenyl)carbonyl]-2-thienyl}-2-[4- (ethylsulfony])phenyI]acetamide
Figure imgf000028_0001
To a solution of N-(4-(4-chlorophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide
(247 mg, see step 4 for synthesis of Example 18) and 2-chlorobenzoyl chloride (206 mg) in 1,2- dichloroethane (DCE) (6 mL) was added tin(IV) chloride (2.0 mL). The reaction mixture was heated at reflux for 100 mins. After cooling to room temperature, the mixture was poured into water (30 mL), and the solution was extracted with DCM (80 mL), The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 : 1) to give the crude product, which was further purified by preparative HPLC to afford N-{4-(4-chIorophenyl)-5-[(2-chlorophenyl)carbonyl]-2-thienyI}-2-[4- (ethylsulfonyl)phenyI]acetamide (100 mg) as a yellow solid. 1 H-NMR (400 MHz, DMSO-<¾) 5 ppm 1.10 (t, J= 7.2 Hz, 3H), 3.29 (q, J= 7.2 Hz, 2H), 3.95 (s, 2H), 6.75 (s, 1H), 7.21-7.27 (m, 6H), 7.30- 7.32 (m, 2H), 7.61 (d, J= 8.4 Hz, 2H), 7.87 (d, J= 8.4 Hz, 2H), 12.18 (s, lH ; MSfES^ m/z 558 (MH+).
Example 20
iV-{4-(3-cyanophenyl)-5-[(2-fluorophenyl)carbonyl]-2-thienyl}-2-[4- (ethylsulf onyI)phenyl] acetami de
Figure imgf000029_0001
To a solution of N-(4-(3-cyanophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyI)phenyl)acetamide (260 mg, see step 5 for synthesis of Example 3) and 2-fluorobenzoyl chloride (273 mg) in 1,2- dichloroethane (DCE) (10 mL) was added tin(IV) chloride (4.0 mL). The reaction mixture was heated at reflux for 1.5 hours. After cooling to room temperature, the mixture was poured into water (40 mL), and the solution was extracted with DCM (90 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1: 1) to give N-{4-(3-cyanophenyl)-5-[(2-fluoroplienyI)carbonyl]-2-thienyl}-2-[4- (ethylsuIfonyl)phenyl]acetamide (165 mg) as a yellow solid. Ή-NMR (400 MHz, DMSO-i¾) δ ppm 1.1 1 (t, J= 7.6 Hz, 3H), 3.29 (q, J=> 7.6 Hz, 2H), 3.96 (s, 2H), 6.81 (s, 1H), 6.89 (t, J= 7.6 Hz, 1H), 7.11 (t, 7= 7.6 Hz, 1H), 7.35-7.39 (m, 3H), 7.55 (d, 7= 8.0 Hz, 1H), 7.60-7.63 (m, 4H), 7.87 (d, J= 8.0 Hz, 2H), 12.20 (s, 1H); MSiES4) m/z 533 (MH* .
Example 21
Ar-{5-[(2,4-dichlorophenyl)carbon l]-4-phenyl-2-thienyl}-2-[4-(ethylsuIfonyl)phenyl]acetamidc
Figure imgf000029_0002
To a solution of 2-[4-(ethylsulfonyl)phenyl]-N-(4-phenyl-2-thienyl)acetamide (160 mg, see step 3 for synthesis of Example 1) and 2,4-dichlorobenzoyl chloride (174 mg) in 1 ,2-dichloroethane (DCE) (14 mL) was added dropwise tin(rV) chloride (0.83 mL) at 0 °C. The reaction mixture was heated to reflux for 3 hours. The reaction mixture was diluted with DCM (50 mL), and the organic phase was washed with water (30 mL). The aqueous layer was extracted with DCM (30 mL x 3). The combined organic phases were dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1 : 1 to EtOAc : PE : THF = 5:5:2) to give the crude product, which was further purified by preparative HPLC to afford N- {5-[(2,4- dichlorophenyI)carbonyl]-4-phenyl-2-thienyl}-2-[4-(ethylsulfonyl)phenyl]acetamide (40 mg) as a white solid. Ή-NMR (400 MHz, DMSO-<¾> δ ppm 1.1 1 (t, J = 7.2 Hz, 3H), 3.30 (q, J = 7.2 Hz, 2H), 3.95 (s, 2H), 6.75 (s, 1H), 7.15-7.35 (m, 8H), 7.61 (d, J= 8.0 Hz, 2H), 7.87 (d, J- 8.0 Hz, 2H), 12.16 (s, 1H); MS(ES+) m/z 558 (MH+).
Example 22
/V-{4-(4-chlorophenyl)-5-((4-chIorop enyl)carbonyl]-2-thienyl}-2-[4- (ethyIsulfonyl)phenyl] acetamide
Figure imgf000030_0001
To a solution of N-(4-(4-chlorophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyI)phenyl)-acetamide
(280 mg, see step 4 for synthesis of Example 18) and 4-chlorobenzoyl chloride (233 mg) in 1,2- dichloroethane (DCE) (6 mL) was added tin(IV) chloride (1 mL). The reaction mixture was heated to reflux for 150 mins. After the reaction completed, the mixture was cooled to room temperature and poured into water (50 mL). The solution was extracted with DCM (60 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash
chromatography (silica gel, EtOAc : PE = 1 : 1) to give N-{4-(4-chlorophenyI)-5-[(4- chlorophenyl)carbonyl]-2-thienyl}-2-[4-(ethylsulfonyl)phenyl]acetamide (208 mg) as a yellow solid. Ή-NMR (400 MHz, DMSO-<¾ δ ppm 1.10 (t, J= 7.2 Hz, 3H), 3.29 (q, J= 7.2 Hz, 2H), 3.95 (s, 2H), 6.84 (s, 1H), 7.20-7.26 (m, 4H), 7.29 (d, J= 8.4 Hz, 2H), 7.44 (d, J= 8.4 Hz, 2H), 7.61 (d, J= 8.0 Hz, 2H), 7.87 (d, J= 8.0 Hz, 2H), 12.10 (s, 1H); MS(ES+) m z 558 (MH+).
Example 23
7V-(4-(3-chlorophenyl)-5-{[2-(methyIoxy)phenyl]carbonyl}-2-thienyl)-2-[4- (ethylsulfonyl)phenyljacetamide
Figure imgf000031_0001
To a solution of 2-methoxybenzoyl chloride (236 mg) and N-(4-(3-chlorophenyl)thiophen-2- yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (291 mg, see step 4 for synthesis of Example 2) in 1,2- dichloroethane (DCE) (10 mL) was added perchlorostannane (361 mg). The reaction mixture was heated at reflux for 150 mins. The mixture was cooled to room temperature and poured into water (50 mL). The solution was extracted with DCM (100 mL). The organic phase was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 : 1) to give the crude, which was further purified by preparative HPLC to give N-(4-(3- chIorophenyl)-5-(2-methoxybenzoyl)miophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (96 mg) as a yellow solid. ]H-NMR (400 MHz, DMSO- ) δ ppm 1.11 (t, J= 7.2 Hz, 3H), 3.28 (q, J= 7.2 Hz,
2H), 3.56 (s, 3H), 3.93 (s, 2H), 6.68-6.70 (m, 2H), 6.82 (t, J= 7.2 Hz, 1H), 7.08-7.21 (m, 6H), 7.61 (d, J= 8.4 Hz, 2H), 7.86 (d, J= 8.4 Hz, 2H), 12.02 (s, 1H); MSfES*) mfz 554 (MH+).
Example 24
AL[4-(3-chlorophenyl)-5-({2-[(trifluoromethyl)oxy]phenyl}carbonyl)-2-thienyl]-2-[4- (ethylsulfony])p enyl]acetamide
Figure imgf000031_0002
To a solution of 2-(trifluoromethoxy)benzoyl chloride (397 mg) and N-(4-(3- chlorophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (742 mg, see step 4 for synthesis of Example 2) in 1 ,2-dichloroethane (DCE) (18 mL) was added perchlorostannane (460 mg). The reaction mixture was stirred at reflux for 5 hours. The mixture was cooled to room temperature and poured into water (60 mL). The solution was extracted with DCM (170 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash
chromatography (silica gel, EtOAc : PE = 1 : 1) to give the crude product, which was further purified by preparative HPLC to give N-(4-(3-chJorophenyl)-5-C2-(trifluoromethoxy)benzoyl)thiophen-2-yl)- 2-(4-(ethylsulfonyl)phenyl)acetamide (85 mg) as a yellow solid. Ή-NMR (400 MHz, DMSO- ) δ ppm 1.10 (t, J~ 7.6 Hz, 3H), 3.28 (q, J= 7.6 Hz, 2H), 3.95 (s, 2H), 6.77 (s, 1H), 7.13-7.28 (m, 6H), 7.41-7.45 (m, 2H), 7.61 (d, J= 8.0 Hz, 2H), 7.87 (d, J= 8.0 Hz, 2H), 12.15 (s, 1H); MSfES4) m/z 608 (Mrf).
Example 25
Λ^-[5-[(2-ο1ι1θΓορΗεηγΙ)θΒΛοηγ1]-4-(2-ΠυοΓορ1ιβηγ1)-2-ίΗΪ6ηγ1]-2-[4- (eth lsulf onyl)phenyl] acetamide
Figure imgf000032_0001
(0.56 g) and morpholine (2,52 g) in ethanol (60 mL) was heated to reflux and stirred overnight. Solvent was removed, and the residue was purified by flash chromatography (silica gel, PE : EtOAc 20: 1 to 10: 1) to give ethyl 2-amino-4-(2-fluorophenyl)thiophene-3-carboxylate (1.1 g) as a yellow solid. MS(ES+) m/z 266 (MET).
Step 2: A solution of OH (1.1 g) was added to a solution of ethyl 2-amino-4-(2- fluorophenyl)thiophene-3-carboxylate (1.32 g) in ethanol (20 mL). Then the reaction mixture was heated to reflux for 20 hours. The solution was cooled to room temperature and concentrated. To the residue was added water (15 mL), and then the solution was acidified to pH ~ 7 with 4 M HC1, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2-amino-4-(2-fluorophenyl)thiophene-3-carboxyIic acid (0.8 g) as a beige solid. MSfES") m/z 238 (MET1).
Step 3: To a solution of 2-amino-4-(2-fluorophenyl)thiophene-3-carboxylic acid (0.8 g) in ethanol (20 mL) was added 2 M HC1 (5.5 mL) solution. The reaction mixture was stirred at room temperature for 2 hours. Solvent was removed in vacuo, and the residue was triturated with diethyl ether to give 4-(2-fluorophenyl)thiophen-2-amine (0.6 g) as a beige solid. MS(ES+) m/z 194 (MH+).
Step 4: To a solution of 4-(2-fluorophenyl)thiophen-2 -amine (0.4 g), 2-(4- (ethylsulfonyl)phenyl)acetic acid (intermediate la, 0.38 g), EDC (0.31 g) and HOBt (0.25 g) in dichloromethane (DCM) (15 mL) was added dropwise DLPEA (0.48 mL) at room temperature. The reaction mixture was heated at reflux under nitrogen overnight. The reaction mixture was partitioned between DCM (30 mL) and water (20 mL). The organic phase was washed with water (20 mL x 2), brine (20 mL), dried over anhydrous sodium sulfate, and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1 :3 to 1 : 1) to give 2-(4-(ethylsulfonyl)phenyl)-N- (4-(2-fluorophenyl)thiophen-2-yl)acetamide (0.35 g) as a pale brown solid. MS(ES+) m/z 404 (MH+).
Step S: To a solution of 2-(4-(ethylsuIfonyl)phenyl)-N-(4-(2-fluorophenyl)thiophen-2- yl)acetamide (0.2 g) and 2-chlorobenzoyl chloride (0.17 g) in 1 ,2-dichloroethane (DCE) (16 mL) was added dropwise tin(IV) chloride (0.99 mL) at 0 °C. The reaction mixture was heated to reflux for 3 hours. The reaction mixture was diluted with DCM (30 mL), and the organic phase was washed with water (20 mL). The aqueous layer was extracted with DCM (30 mL x 3). The combined organic phases were dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1: 1 to EtOAc : PE : THF = 5:5:2) to give the crude product, which was further purified by preparative HPLC to afford N-(5-(2-chlorobenzoyl)-4- (2-fIuorophenyl)thiophen-2-yl)-2-(4-(ethylsuIfonyl)phenyl)acetamide (17 mg) as a yellow solid. Ή- NMR (400 MHz, DMSO-< ) δ ppm 1.11 (t, J= 7.2 Hz, 3H), 3.30 (q, J= 7.2 Hz, 2H), 3.95 (s, 2H), 6.74 (s, 1H), 6.99-7.31 (m, 8H), 7.61 (d, J= 8.0 Hz, 2H), 7.86 (d, J= 8.0 Hz, 2H), 12.14 (s, 1H); MS(ES+) m z 542 (MH+).
Example 26
iV-[5-[(2-chlorophenyl)carbony]]-4-(4-fluorophenyl)-2-thienyl]-2-[4- (ethylsulf ony.)ph enyl] acetami de
Figure imgf000033_0001
Step 1: A mixture of 1 -(4-fluorophenyl)ethanone (2 g), ethyl 2-cyanoacetate (3.28 g), sulfur (0.56 g) and morpholine (2.52 g) in ethanol (60 mL) was heated to reflux and stirred overnight. Solvent was removed. The residue was purified by flash chromatography (silica gel ; PE : EtOAc = 20: 1 to 10: 1) to give ethyl 2-amino-4-(4-fluorophenyl)thiophene-3-carboxylate (1.28 g) as a yellow solid. MS(ES+) m/z 266 (MH4).
Step 2: A solution of KOH (1.1 g) was added to a solution of ethyl 2-amino-4-(4- fluorophenyl)thiophene-3-carboxylate (1.32 g) in ethanol (20 mL). The reaction mixture was then heated to reflux for 20 hours. The solution was cooled to room temperature and concentrated. To the residue was added water (15 mL), and then the solution was acidified to pH ~ 7 with 4 M HC1, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2-amino-4-(4-fluorophenyl)thiophene-3-carboxylic acid (0.9 g) as a beige solid. MS(ES+) m/z 238 (MH+).
Step 3: To a solution of 2-amino-4-(4-fluorophenyl)thiophene-3-carboxylic acid (0.9 g) in ethanol (20 mL) was added 2 M HC1 (9.5 mL) solution. The reaction mixture was stirred at room temperature for 2 hours. Solvent was removed in vacuo. The residue was triturated with diethyl ether to give 4-(4-fluorophenyl)thiophen-2-amine (0.7 g) as a beige solid. MS(ES+) m/z 1 4 (MH+).
Step 4: To a solution of 4-(4-fluorophenyl)thiophen-2 -amine (0.5 g), 2-(4- (ethylsulfonyl)phenyl)acetic acid (intermediate la, 0.54 g), EDC (0.46 g) and HOBt (0.36 g) in dichloromethane (DCM) (15 mL) was added dropwise DIPEA (0.69 mL) at room temperature. The reaction mixture was heated at reflux under nitrogen overnight. The reaction mixture was partitioned between DCM (30 mL) and water (20 mL). The organic phase was washed with water (20 mL x 2), brine (20 mL), dried over anhydrous sodium sulfate, and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1 :3 to 1 : 1) to give 2-(4-(ethylsulfonyl)phenyl)-N- (4-(4-fluorophenyl)thiophen-2-yl)acetamide (0.35 g) as a pale brown solid. MS(ES+) m/z 404 (MH+).
Step 5: To a solution of 2-(4-(ethylsuIfonyl)phenyl)-N-(4-(4-fluorophenyl)thiophen-2- yl)acetamide (0.2 g) and 2-chlorobenzoyI chloride (0.17 g) in 1 ,2-dichIoroethane (DCE) (16 mL) was added dropwise tin(IV) chloride (0.99 mL) at 0 °C. The reaction mixture was heated to reflux for 3 hours. The reaction mixture was diluted with DCM (30 mL), and the organic phase was washed with water (20 mL). The aqueous layer was extracted with DCM (30 mL x 3). The combined organic phases were dried over anhydrous sodium sulfate, filtered and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 1 : 1 to EtOAc : PE : THF = 5:5:2) to give the crude product, which was further purified by preparative HPLC to afford N-(5-(2-chlorobenzoyl)-4- (4-fluorophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (53 mg) as a yellow solid, Ή- NMR (400 MHz, DMSO-i¾ δ ppm 1.11 (t, J= 7.2 Hz, 3H), 3.30 (q, J= 7.2 Hz, 2H), 3.95 (s, 2H), 6.74 (s, 1H), 6.96-7.31 (m, 8H), 7.61 (d, J= 8.0 Hz, 2H), 7.86 (d, J= 8.0 Hz, 2H), 12.14 (s, 1H); MS(ES+) m/z 542 (MH+).
Example 27
7V-{5-f(2-chlorophenyl)carbonyl]-4-[3-(trifluoromethyl)phenyl]-2-thienyl}-2-[4- (ethylsulf onyl)phenyl] aeetamide
Figure imgf000035_0001
Step 1: To a suspension of l -(3-(trifluoromethyl)phenyI)ethanone (2.5 g), morpholine (2.32 mL) and sulfur (0.64 g) in ethanol (100 mL) stirred under nitrogen was added ethyl 2-cyanoacetate (2.26 g). The reaction mixture was stirred at 105 °C for 14 hours. The mixture was concentrated, and the residue was purified by column chromatography (silica gel, EtOAc : PE = 1 :20) to give ethyl 2- amino-4-(3-(trifluoromethyl)phenyl)thiophene-3-carboxylate (1.7 g) as a yellow solid. MS(ES+) m z 316 (MH+).
Step 2: A solution of KOH (1.21 g) in water (10 mL) was added to a solution of ethyl 2-amino- 4-(3-(trifluoromethyl)phenyl)thiophene-3-carboxylate (1.7 g) in ethanol (50 mL). The reaction mixture was stirred at reflux for 20 hours. The mixture was cooled to room temperature and concentrated. To the residue was added water (50 mL), and the solution was extracted with EtOAc (50 mL x 3). The combined organic phases were dried over sodium sulfate and concentrated to give 4-(3-(trifiuoromethyl)phenyl)thiophen-2 -amine (800 mg) as a black oil. MS(ES+) m/z 244 (MH+).
Step 3: To a solution of 4-(3-(trifluoromethyl)phenyl)thiophen-2-amine (800 mg), 2-(4- (ethylsulfonyl)phenyl)acetic acid (1.13 g), HOBt (504 mg) and DIPEA (1.72 mL) in THF (30 mL) stirred at room temperature under nitrogen was added EDC (1.89 g) in one charge. The reaction mixture was stirred at 70 °C overnight. The mixture was concentrated, and the residue was purified by column chromatography (silica gel, THF : EtOAc : PE = 1 : 1: 1) to give 2-(4- (ethylsulfonyI)phenyl)-N-(4-(3-(trifluoromethyl)phenyl)thiophen-2-yl)acetamide (270 mg) as a black solid. MS(ES+) m/z 454 (MH+).
Step 4: To a solution of 2-chlorobenzoyl chloride (190 mg) and 2-(4-(ethylsulfonyl)phenyl)-N- (4-(3-(trifluoromethyl)phenyl)thiophen-2-yl)acetamide (246 mg) in 1,2-dichloroethane (DCE) (16 mL) was added tin(IV) chloride (1 mL). The reaction mixture was stirred at reflux for 150 mins. The mixture was cooled to room temperature, poured into water (50 mL), and then extracted with DCM (150 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 : 1) to give N-(5-(2-chlorobenzoyl)- 4-(3-(trifluoromethyl)phenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)-phenyl)acetamide (180 mg) as a yellow solid. Ή-NMR (400 MHz, DMSO-t¾) δ ppm 1.10 (t, J= 7.2 Hz, 3H), 3.31 (q, J= 7.2 Hz, 2H), 3.96 (s, 2H), 6.79 (s, 1H), 7.14-7.24 (m, 3H), 7.30 (d, J- 7.2 Hz, 1H), 7.45 (m, 2H), 7.53 (m, 2H), 7.61 (d, J= 8.0 Hz, 2H), 7.87 (s, J= 8.0 Hz, 2H), 12.19 (s, 1H ; MSfES4) m/z 592 (MH+).
Example 28
TV- {4-(3- chlorophenyI)-5- [(2-methyIphenyl) car bonyI]-2- thienyI}-2-[4- (ethyl sulf onyl)phenyl] acctamide
Figure imgf000036_0001
To a solution of 2-methyIbenzoyl chloride (320 mg) and N-(4-(3-chlorophenyl)thiophen-2-yl)- 2-(4-(ethylsulfonyl)phenyl)acetamide (870 mg, see step 4 for synthesis of Example 2) in 1,2- dichloroethane (DCE) (16 mL) was added tin(IV) chloride (2.3 mL). The reaction mixture was stirred at reflux for 110 niins. The mixture was cooled to room temperature and poured into water (50 mL). The solution was extracted with DCM (80 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 : 1 ) to give N-(4-(3-chlorophenyl)-5-(2-methylbenzoyl)thiophen-2-yl)-2-(4-
(ethyIsulfonyl)phenyl)acetamide (410 mg) as a yellow solid. 'H-NMR (400 MHz, DMSO-d6) δ ppm 1.10 (t, J= 7.6 Hz, 3H), 2.22 (s, 3H), 3.30 (q, J= 7.6 Hz, 2H), 3.94 (s, 2H), 6.78 (s, 1H), 6.96 (m, 1H), 7.12 (t, J= 8.4 Hz, 2H), 7.17-7.22 (m, 5H), 7.61 (d, = 8.4 Hz, 2H), 7.87 (d, J= 8.4 Hz, 2H), 12.12 (s, 1H); MS(ES+) m/z 538 (MH+).
Example 29
A'-[5-[(2-chlorophenyl)carbonyl]-4-(3-fluorophenyl)-2-thienyl]-2-[4- (ethylsulfonyl)phenyl] acetamide
Figure imgf000036_0002
Step 1: A suspension of l-(3-fluorophenyl)ethanone (780 mg), ethyl 2-cyanoacetate (958 mg), morpholine (984 mg) and sulfur (231 mg) in ethanol (50 mL) was stirred at 105 °C under nitrogen for 14 hours. Solvent was removed in vacuo, and the residue was purified by flash chromatography {silica gel, EtOAc : PE = 1:9) to give ethyl 2-amino-4-(3-fluorophenyl)thiophene-3-carboxylate (800 mg) as a yellow solid. MS(ES+) m/z 266 (MH+).
Step 2: To a solution of ethyl 2-amino-4-(3-fluorophenyl)thiophene-3-carboxylate (0.8 g) in ethanol (100 mL) was added potassium hydroxide (0.7 g) in water (100 mL). The reaction mixture was stirred at 105°C overnight. The mixture was concentrated, and the residue was dissolved in water (200 mL). The solution was acidified to pH ~ 7 with 2 M hydrochloric acid, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2-amino-4-(3-fluorophenyl)thiophene-3-carboxylic acid (0.5 g). MS(ES^) m/z 254 (MH+).
Step 3: To a solution of 2-amino-4-(3-fluorophenyI)fhiophene-3-carboxyHc acid (0.5 g) in ethanol (50 mL) was added a solution of hydrochloric acid (2 M, 20 mL) in one charge. The reaction mixture was stirred at 20 °C for 2 hours. Solvent was removed in vacuo, and the residue was triturated with ether to give 4-(3-fluorophenyl)thiophen-2-amine hydrochloride (0.7 g) as a grey solid. MS(ES+) m/z l94 (MH* .
Step 4: A suspension of 4-(3-fluorophenyl)thiophen-2-amine hydrochloride (0.5 g), 2-(4-
(ethylsulfonyl)-phenyl)acetic acid (intermediate la, 0.6 g) and BOP reagent (1.1 g) in DMF (8 mL) was stirred at 50 °C under nitrogen overnight. The mixture was poured into water (300 mL), and the solution was extracted with ethyl acetate (150 mL). The organic layer was washed with brine (200 mL x 3), dried over anhydrous sodium sulfate, and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc) to give 2-(4-(ethylsulfonyI)phenyl)-N-(4-(3- fluorophenyl)thiophen-2-yl)acetamide (2.7 g) as a black solid. MS(ES+) m/z 404 (MH+).
Step 5: To a solution of 2-chlorobenzoyl chloride (4 1 mg) and 2-(4-(ethylsulfonyl)phenyl)-N- (4-(3-fluorophenyl)thiophen-2-yI)acetamide (520 mg) in 1 ,2-dichloroethane (DCE) (16 mL) was added tin(IV) chloride (0.30 mL). The reaction mixture was stirred at reflux for 130 mins. The mixture was cooled to room temperature, poured into water (50 mL), and then extracted with DCM (150 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1: 1) to give the crude product, which was further purified by preparative HPLC to afford N-(5-(2-chlorobenzoyl)-4-(3- fluorophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl) acetamide (61 mg) as a yellow solid. Ή- NMR (400 MHz, DMSO-<¾) δ ppm 1.10 (t, J= 7.6 Hz, 3H), 3.28 (q, J~ 7.6 Hz, 2H), 3.95 (s, 2H), 6.76 (s, 1H), 6.99-7.05 (m, 3H), 7.18-7.30 (m, 5H), 6.10 (d, J= 8.0 Hz, 2H), 7.86 (d, J= 8.0 Hz, 2H), 12.16 (s, 1H); MS(ES+) m/z 542 (MH+). Example 30
2-[4-(ethylsulfonyl)phenylJ-ALf4-(3-fluorophenyl)-5-(phenylcarbonyl)-2-thienyl]acetamide
Figure imgf000038_0001
To a solution of 2-(4-(ethylsulfonyl)phenyl)-N(4-(3 -fluorophenyl)- thiophen-2-yl)acetamide
(183 mg, see step 4 for synthesis of Example 29) and benzoyl chloride (229 mg) in 1,2- dichloroethane (DCE) (8 mL) was added tin(IV) chloride (2.0 mL). The reaction mixture was heated at reflux for 90 mins. After cooling to room temperature, the mixture was poured into water (30 mL), and the solution was extracted with DCM (80 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1: 1) to give the crude product, which was further purified by preparative HPLC to afford 2-[4-(ethylsulfonyl)phenyl]-N-[4-(3-fluorophenyI)-5-(phenylcarbonyl)-2-thienyl]acetamide (102 mg) as a yellow solid. Ή- MR (400 MHz, DMSO-< ) δ ppm 1.10 (t, J= 7.2 Hz, 3H) , 3.29 (q, J= 7.2 Hz, 2H), 3.95 (s, 2H), 6.85 (s, IH), 6.98-7.04 (m, 3H), 7.17-7.25 (m, 3H), 7.37-7.39 (m, IH), 7.46 (d, J= 8.0 Hz, 2H), 7.62 (d, J= 8.0 Hz, 2H), 7.87 (d, J= 8.0 Hz, 2H), 12.08 (s, IH); MS(ES+) m/z 508 (MH+).
Example 31
7V-[4-(4-cyanophenyl)-S-(phenylcarbonyl)-2-thien l]-2-[4-(ethylsulfonyl)phenyl]acetamide
Figure imgf000038_0002
Step 1: A suspension of l-(4-bromophenyl)ethanone (5 g), ethyl 2-cyanoacetate (4,28 g), morpholine (4.35 g) and sulfur (1.03 g) in ethanol (50 mL) was stirred at 105 °C under nitrogen for 14 hours. Solvent was removed in vacuo, and the residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 :9) to give ethyl 2-amino-4-(4-bromophenyl)thiophene-3-carboxylate (2.3 g) as a white solid. MS(ES+) m/z 326 (MH+). Step 2: To a solution of ethyl 2-amino-4-(4-bromophenyl)thiophene-3-carboxylate (4.25 g) in ethanol (75 mL) and water (75 mL) was added potassium hydroxide (1.83 g). The reaction mixture was refluxed for 30 hours. Ethanol was removed in vacuo, and the aqueous phase was extracted with EtOAc. The organic phase was washed with water and brine, dried over anhydrous sodium sulfate, and concentrated to give 4-(4-bromophenyl)thiophen-2-amine (2.32 g) as a grey solid. MStES ) m/z 254 (MH+).
Step 3: To a solution of 4-(4-bromophenyl)thiophen-2-amine (2.3 g) in dichloromethane (DCM) (100 mL) was added HOBt (1.66 g,), EDC (5.20 g) and DIPEA (9.48 mL). The reaction mixture was refluxed under nitrogen overnight. Solvent was removed in vacuo, and the residue was purified by column chromatography (silica gel, EtOAc : PE = 0: 1 to 4: 1) to give N-(4-(4-bromophenyl)thiophen- 2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (2 g) as a grey solid. S(ES m/z 464 (MH+).
Step 4: To a solution of N-(4-(4-bromophenyl)thiophen-2-yl)-2-(4- (etliylsulfonyl)phenyl)acetamide (500 mg) in ΝΜΡ (3 mL) was added copper(I) cyanide (192 mg). The reaction mixture was heated at 1 0 °C in the microwave for 3 hours. The reaction mixture was filtered to remove the solid, and the residue was partitioned between ethyl acetate (20 mL) and water (20 mL). The organic phase was washed with water and brine, dried over anhydrous sodium sulfate, and concentrated to give N-(4-(4-cyanophenyl)tliiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (200 mg) as a dark red solid. MS(ES") m/z 411 (MH+).
Step 5: To a solution of N-(4-(4-cyanophenyI)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)acetamide (200 mg) in 1,2-dichloroethane (DCE) (30 mL) was added tin(IV) chloride (254 mg) and benzoyl chloride (137 mg). The reaction mixture was refluxed for 1 hour. The mixture was partitioned between water (100 mL) and DCM (50 mL). The organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated. The residue was purified with preparative HPLC to give N-(5-benzoyl-4-(4-cyanophenyl)thiophen-2-yl)-2-(4-(ethylsulfonyl)phenyl)acetamide (75 mg) as a white solid. Ή-NMR (400 MHz, CDC13) δ ppm 1.11 (t, J= 7.2 Hz, 3H), 3.30 (q, J= 7.2 Hz, 2H), 3.96 (s, 2H), 6.88 (s, 1H), 7.26 (t, J= 8.0 Hz, 2H), 7.41-7.49 (m, 5H), 7.62 (d, J= 8.4 Hz, 2H), 7.65 (d, J= 8.4 Hz, 2H), 7.87 (d, J= 8.4 Hz, 2H), 12.16 (s, 1H); MS(ES > m/z 515 (MH .
Example 32
2-[4-(ethyisulfonyl)phenyl]-Ar-{4-(4-fIuorophenyl)-5-[(3-fluorophenyl)carbonyl]-2- thienyl}acetamide
Figure imgf000040_0001
To a solution of 2-(4-(ethylsulfonyl)phenyl)-N-(4-(4-fluorophenyl) thiophen-2-yl)acetamide (1.1 g, see step 4 for synthesis of Example 26) and 3-fluorobenzoyl chloride (0.9 g) in 1,2- dichloroethane (DCE) (8 mL) was added tin(IV) chloride (10.0 mL). The reaction mixture was heated at reflux for 3 hours. After cooling to room temperature, the mixture was poured into water (80 mL). The solution was extracted with DCM (200 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography (silica gel, EtOAc : PE = 1 : 1) to give 2-[4-(ethylsulfonyl)phenyl]-N-{4-(4-fluorophenyl)-5-[(3-fluorophenyl)carbonyl]-2- thienyl}acetamide (210 mg) as a yellow solid. Ή- MR (400 MHz, DMSO-c¾ δ ppm 1.10 (t, J= 7.2 Hz, 3H) , 3.30 (q, J= 7.2 Hz, 2H), 3.96 (s, 2H), 6.83 (s, 1H), 6.99 (t, J= 8.8 Hz, 2H), 7.14-7.26 (m, 6H), 7.62 (d, J= 8.4 Hz, 2H), 7.88 (d, J= 8.4 Hz, 2H), 12.11 (s, 1H); MSiES") m/z 526 (MM").
Example 33
2-[4-(ethylsulfonyl)phenyl]-/V-[4-(4-fluorophenyl)-5-(phenylcarbonyI)-2-thienyl]acetamide
Figure imgf000040_0002
To a solution of 2-(4-(ethyIsulfonyl)phenyl)-N-(4-(4-fluorophenyl)- thiophen-2-yl)acetamide
(343 mg, see step 4 for synthesis of Example 26) and benzoyl chloride (306 mg) in 1,2- dichloroethane (DCE) (8 mL) was added tin(FV) chloride (2.0 mL). The reaction mixture was heated at reflux for 100 mins. After cooling to room temperature, the mixture was poured into water (30 mL), and the solution was extracted with DCM (80 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated. The residue was purified by flash chromatography (silica gel,
EtOAc : PE = 1: 1) to give 2-[4-(etliylsulfonyl)phenyl]-N-[4-(4-fluorophenyl)-5-(phenylcarbonyl)-2- thienyl]acetamide (300 mg) as a yellow solid. Ή-NMR (400 MHz, DMSO-rf6) δ ppm 1.10 (t, J= 7.2 Hz, 3H) , 3.29 (q, J~ 7.2 Hz, 2H), 3.95 (s, 2H), 6.83 (s, 1H), 6.98 (t, J- 7.2 Hz, 2H), 7.22-7.25 (m, 4H), 7.37-7.40 (m, 1H), 7.43-7.45 (m, 2H), 7.62 (d, J= 6.4 Hz, 2H), 7.87 (d, J— 6.4 Hz, 2H), 12.05 (s, 1H); MS(ES+) m/z 508 (MH+). Example 34
iV-{4-(3-chlorophenyl)-5-[(2-chlorophenyl)carbonyI]-2-thienyl}-2-[4- (ethylsulfonyl)phcnyljpropanamide
Figure imgf000041_0001
Step 1: To a solution of 2-(4-nitrophenyI)propanoic acid (10 g) in methanol (200 mL) was added Pd/C (10%, 300 mg). The mixture was stirred at room temperature under hydrogen for 1 d. The mixture was filtered, and the filtrate was concentrated to give 2-(4-aminophenyl)propanoic acid (8 g) as a brown oil. MS(ES+) m/z 166 (MET).
Step 2: A solution of sodium nitrite (3.35 g) in water (20 mL) was added dropwise to a suspension of 2-(4-aminophenyl)propanoic acid (8 g) in water (26 mL) and concentrated hydrochloric acid (60 mL) stirred at 0 °C. After the addition was complete, the reaction mixture was stirred at the same temperature for a further 45 minutes. This cold diazonium salt solution was then added dropwise at room temperature to a mixture of potassium O-ethyl carbonodithioate (9.0 g) in 40 mL of water and 40 mL of a 2 M sodium carbonate solution, and the mixture was heated at 45 °C until gas evolution stopped. The mixture was subsequently cooled to room temperature. The pH was adjusted to 1 with concentrated hydrochloric acid. The oiled xanthogenate ester was extracted with EtOAc (100 mL x 3). The solvent was evaporated to give 2-(4-(ethoxycarbonothioylthio)phenyl)propanoic acid (13 g) as a red liquid. MS(ES ) m/z Til (MlT).
Step 3: 2-(4-(ethoxycarbonothioylthio)phenyl)propanoic acid (13 g) was taken up in 60 mL of ethanol, and a solution of KOH (19.88 g) in 60 mL of water was added. The reaction mixture was refluxed for 3 hours. The major portion of ethanol was subsequently removed in vacuo. The aqueous phase was cooled with ice, and was rendered acid with concentrated hydrochloric acid while stirring well. The desired product was extracted with DCM (50 mL x 3). The combined organic phases were washed with brine, dried over anhydrous sodium sulfate, filtered, and concentrated to afford 2-(4- mercaptophenyI)propanoic acid (8 g) as a yellow solid. MSiES4) m/z 183 (MH+).
Step 4: To a solution of 2-(4-mercaptophenyl)propanoic acid (8 g) in NN-dimethylformamide (100 mL) was added bromoethane (14.35 g) and potassium carbonate (24.27 g). The reaction mixture was stirred at room temperature overnight. The mixture was partitioned between ethyl acetate (200 mL) and water (200 mL). The organic phase was washed with water (100 mL x 4) and brine (50 mL), dried with sodium sulfate, filtered, and concentrated to give ethyl 2-(4-(ethylthio)phenyl)propanoate (12 g) as red oil. MS(ES+) m/z 239 (MH+).
Step 5: To a solution of ethyl 2-(4-(ethylthio)phenyl)propanoate (12 g) in dichloromethane (100 mL) was added wCPBA (26.1 g). The reaction mixture was stirred at room temperature overnight. The reaction mixture was filtered to remove the solid. The filtrate was washed with sat, sodium carbonate solution (200 mL x 2), water (100 mL), brine (50 mL), dried over sodium sulfate, filtered, and concentrated. The residue was purified by column chromatography (silica gel, EtOAc : PE = 0: 1 to 1 :2) to give ethyl 2-(4-(ethylsulfonyl)phenyl)propanoate (8 g) as a white solid. MSfES ) m/z 271 (MH4).
Step 6: To a solution of ethyl 2-(4-(ethylsulfonyl)phenyl)propanoate (8 g) in ethanol (60 mL) was added a solution of NaOH (4.73 g) in water (60 mL). The reaction mixture was stirred at room temperature overnight. Ethanol was removed under reduced pressure, and 100 mL of water was added. The aqueous phase was washed with dichloromethane (50 mL x 2), and then acidified with 6 M HC1 to pH = 1. The product was extracted with ethyl acetate (100 mL x 2). The combined organic phases were washed with brine (50 mL), dried over sodium sulfate, filtered, and concentrated to give 2-(4- (ethylsulfonyi)phenyl)propanoic acid (6 g) as a dark red oil, which slowly solidified to give a yellow solid. MS(ES+) m/z 243 (MH+).
Step 7: To a solution of 4-(3-chlorophenyl)thiophen-2-amine hydrochloride (200 mg, see step 3 for synthesis of Example 2) in dichloromethane (40 mL) was added 2-(4-
(ethylsulfonyl)phenyl)propanoic acid (462 mg), HOBt (175 mg), EDC (549 mg) and DIPEA (1 mL). The reaction mixture was refluxed under nitrogen overnight. The mixture was partitioned between dichloromethane (60 mL) and water (50 mL). The organic phase was washed with water (50 mL x 2), dried over anhydrous sodium sulphate, filtered, and concentrated. The residue was purified by column chromatography (silica gel, PE : EtOAc = 7:1) to give N-(4-(3-chlorophenyl)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)propanamide (170 mg) as a yellow oil. MSfTEiS^ m/z 434 (MH+).
Step 8: To a solution of N-(4-(3-chlorophenyI)thiophen-2-yl)-2-(4- (ethylsulfonyl)phenyl)propanamide (170 mg) in dry 1 ,2-dichloroethane (DCE) (20 mL) was added tin(IV) chloride (254 mg) and benzoyl chloride (137 mg). The reaction mixture was refluxed for 1 hour. Water (50 mL) and DCM (50mL) were added. The organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated. The residue was purified with preparative HPLC to give N- {4-(3 -chl orophenyl)-5- [(2 -chlorophenyl)carbonyl]-2-thienyl } -2- [4-
(ethylsulfonyl)phenyl]propanamide (34 mg) as a white solid. Ή- MR (400 MHz, DMSO-<¾) δ ppm 1.10 (t, J= 7.2 Hz, 3H), 1.50 (d, J= 6.8 Hz, 3H), 3.28 (q, J= 7.2 Hz, 2H), 4.06 (q, J= 6.8 Hz, 1H), 6.73 (s, 1H), 7.18-7.31 (m, 8H), 7.64 (d, J= 8.0 Hz.2H), 7.88 (d, J= 8.0 Hz, 2H), 12.07 (s, 1H); MS(ES+) m z 572 (MH+).
Example 35
2-(4-(ethylsulfonyl)phenyl)-iY-(5-(3-fluorobenzoyl)-4-(3-(trifluoromethyl)pheny])thiophen-2- yl)acetamide
Figure imgf000043_0001
Step 1: A mixture of l-(3-(trifluoromethyl)phenyl)ethanone (4.9 g), ethyl 2-cyanoacetate (10 g), morpholine (4.5 g) and sulfur (1.1 g) in ethanol (80 mL) was stirred at 105 °C for 14 hours. Solvent was removed, and the residue was purified by flash chromatography (EtOAc : PE = 1 :9) to give ethyl 2-amino-4-(3-fluorophenyl)thiophene-3-carboxylate (1.5 g) as a yellow solid. MS(ES+) m/z 316
(MH+).
Step 2: A mixture of ethyl 2-amino-4-(3-fluorophenyl)thiophene-3-carboxylate (1.5 g) and potassium hydroxide (1.6 g) in ethanol (30 mL) and water (30 mL) was stirred at 105 °C overnight, ethanol was removed, and to the residue was added water (200 mL). The solution was acidified to pH ~ 7 with 2 M HC1 solution, at which point solid precipitated from the solution. The solid was collected by filtration, washed with water, and dried in air to give 2-amino-4-(3- fluorophenyI)thiophene-3-carboxylic acid (1.2 g). MS(ES^ m/z 288 (MH*).
Step 3: To a solution of 2-amino-4-(3-(trifluoromethyl)phenyl)thiophene-3-carboxylic acid (1.2 g) in ethanol (30 mL) was added hydrochloric acid (2 M, 30 mL) in one charge. The reaction mixture was stirred at 20 °C for 2 hours. Solvent was removed, and the residue was triturated with diethyl ether to give 4-(3-(trifluoromethyl)phenyl)thiophen-2-ainine hydrochloride (0.7 g) as a grey solid. MS(ES+) m/z 244 (MH+).
Step 4: A mixture of 4-(3-(trifluoromethyl)phenyl)thiophen-2-amine hydrochloride (0.5 g), 2- (4-(ethylsulfonyl)-phenyl)acetic acid (intermediate la, 0.6 g), BOP (1.1 g), and DIPEA (0.6 g) in DMF (12 mL) was stirred at 50 °C overnight. The reaction mixture was poured into water (300 mL) and extracted with ethyl acetate (150 mL). The organic layer was washed with brine, dried and concentrated. The residue was purified by flash chromatography (ethyl acetate) to give 2-(4- (ethylsuIfonyl)phenyl)-N-(4-(3-(trifluoromemyl)phenyl)miophen-2-yl)acetamide (0.5 g) as a black solid. MS(ES+) m/z 404 (MH*). Step 5: To a mixture of 2-chlorobenzoyl chloride (184 mg) and 2-(4-(ethylsulfonyl)phenyl)-N- (4-(3-(trifluoromethyl)phenyl)thiophen-2-yl)acetamide (436 mg) in 1,2-dichloroethane (DCE) (16 mL) was added tin(IV) chloride (0.30 mL). The reaction mixture was heated at reflux for 24 hours. After cooling to RT, the mixture was poured into water (50 mL), The solution was extracted with DCM (150 mL), and the organic phase was dried and concentrated. The residue was purified by flash chromatography (EtOAc : PE = 1 : 1) to give the crude product. Further purification by prep-HPLC afforded 2-(4-(ethylsulfonyl)phenyl)-N-(5-(3-fluorobenzoyl)-4-(3-(trifluoromethyl)phenyl)diiophen- 2-yl)acetamide (61 mg) as a yellow solid. Ή-NMR (400 MHz, DMSO-i 6) δ ppm 1.10 (t, J= 7.6 Hz, 3H), 3.28 (q, J= 7.6 Hz, 2H), 3.97 (s, 2H), 6.89 (s, 1H), 7.14-7.22 (m, 4H), 7.42-7.48 (m, 2H)} 7.53- 7.58 (m, 2H), 7.62 (d, 7= 8.0 Hz, 2H), 7.88 (d, J= 8.0 Hz, 2H), 12.15 (s, 1H); 19F-NMR (376 MHz, DMSO-<¾ δ ppm -1 13.32; -61.26; MS(ES+) m/z 542 (MH+).
Biological Data
As stated above, the compounds according to Formula I are RORy modulators, and are useful in the treatment of diseases mediated by RORy. The biological activities of the compounds according to Formula I can be determined using any suitable assay for determining the activity of a candidate compound as a RORy modulator, as well as tissue and in vivo models.
Dual Fluorescence Energy Transfer (FRET) Assay
This assay is based on the knowledge that nuclear receptors interact with cofactors (transcription factors) in a ligand dependent manner. RORy is a typical nuclear receptor in that it has an AF2 domain in the ligand binding domain (LBD) which interacts with co-activators. The sites of interaction have been mapped to the LXXLL motifs in the co-activator SRC 1(2) sequences. Short peptide sequences containing the LXXLL motif mimic the behavior of full-length co-activator.
The assay measures ligand-mediated interaction of the co-activator peptide with the purified bacterial -expressed RORy ligand binding domain (RORy-LBD) to indirectly assess ligand binding. RORy has a basal level of interaction with the co-activator SRC 1(2) in the absence of ligand, thus it is possible to find ligands that inhibit or enhance the RORy/SRCI(2) interaction.
Materials
Generation ofRORy-LBD bacterial expression plasmid
Human RORy Ligand Binding Domain (RORy-LBD) was expressed in E.coli strain
BL21(DE3) as an amino-terminal polyhistidine tagged fusion protein. DNA encoding this
recombinant protein was sub-cloned into a modified pET21a expression vector (Novagen). A modified polyhistidine tag (MK HHHHHHLVPRGS) was fused in frame to residues 263-518 of the human RORy sequence. Protein Purification
Approximately 50 g E.coli cell pellet was resuspended in 300 mL of lysis buffer (30 mM imidazole pH 7.0 and 150 mM NaCl). Cells were lysed by sonication and cell debris was removed by centrifugation for 30 minutes at 20,000g at 4°C. The cleared supernatant was filtered through a 0.45 uM cellulose acetate membrane filter. The clarified lysate was loaded onto a column (XK-26) packed with ProBond Nickel Chelating resin (InVitrogen), pre-equilibrated with 30 mM imidazole pH 7.0 and 150 mM NaCl. After washing to baseline absorbance with the equilibration buffer, the column was developed with a gradient from 30 to 500 mM imidazole pH 7.0. Column fractions containing the RORy-LBD protein were pooled and concentrated to a volume of 5 mis. The concentrated protein was loaded onto a Superdex 200 column pre-equilibrated with 20 mM Tris-Cl pH 7.2 and 200 mM NaCl. The fractions containing the desired RORy-LBD protein were pooled together.
Protein Biotinylation
Purified RORy-LBD was buffer exchanged by exhaustive dialysis [3 changes of at least 20 volumes (>8000x)] against PBS [lOOmM NaPhosphate, pH 8 and 150mM NaCl]. The concentration of RORy-LBD was approximately 30uM in PBS. Five-fold molar excess of NHS-LC-Biotin (Pierce) was added in a minimal volume of PBS. This solution was incubated with occasional gentle mixing for 60 minutes at ambient room temperature. The modified RORy-LBD was dialyzed against 2 buffer changes - TBS pH 8.0 containing 5mM DTT, 2mM EDTA and 2% sucrose - each at least 20 times of the volume. The modified protein was distributed into aliquots, frozen on dry ice and stored at -80°C. The biotinylated RORy-LBD was subjected to mass spectrometric analysis to reveal the extent of modification by the biotinylation reagent. In general, approximately 95% of the protein had at least a single site of biotinylation and the overall extent of biotinylation followed a normal distribution of multiple sites ranged from one to five.
A biotinylated peptide corresponding to amino acid 676 to 700
(CP S SHS SLTERHKILHRLLQEGSP S) of the co-activator steroid receptor coactivator SRC 1(2) was generated using similar method.
Assay
Preparation of Europium labeled SRC1(2) peptide: biotinylated SRC1(2) solution was prepared by adding an appropriate amount of biotinylated SRC 1(2) from the lOOuM stock solution to a buffer containing 10 mM of freshly added DTT from solid to give a final concentration of 40 nM. An appropriate amount of Europium labeled Streptavidin was then added to the biotinylated SRC 1(2) solution in a tube to give a final concentration of 10 nM. The tube was inverted gently and incubated for 15 minutes at room temperature. Twenty-fold excess biotin from the 10 mM stock solution was added and the tube was inverted gently and incubated for 10 minutes at room temperature.
Preparation of APC labeled RORy-LBD: biotinylated RORy-LBD solution was prepared by adding an appropriate amount of biotinylated RORy-LBD from the stock solution to a buffer containing 10 mM of freshly added DTT from solid to give a final concentration of 40 nM. An appropriate amount of APC labeled Streptavidin was then added to the biotinylated RORy-LBD solution in a tube to give a final concentration of 20 nM. The tube was inverted gently and incubated for 15 minutes at room temperature. Twenty-fold excess biotin from the 10 mM stock solution was then added and the tube was inverted gently and incubated for 10 minutes at room temperature.
Equal volumes of the above-described Europium labeled SRC 1(2) peptide and the APC labeled RORy-LBD were gently mixed together to give 20nM RORy-LBD, ΙΟηΜ APC-Strepavidin, 20nM SRC1(2) and 5nM Europium- Streptavidin. The reaction mixtures were incubated for 5 minutes. Using a Thermo Combi Multidrop 384 stacker unit, 25 ul of the reaction mixtures per well was added to the 384-well assay plates containing lul of test compound per well in 100% DMSO. The plates were incubated for lhour and then read on ViewLux in Lance mode for EU/APC.
Jurkat Cell Luciferase Assay
RORy is known to bind to a CNS (conserved non-coding sequences) enhancer element in the IL17 promoter. In this assay, RORy activity is indirectly assessed using a luciferase reporter construct which contains the human IL 17 promoter having the RORy-specific CNS enhancer element.
Inhibition of RORy activity by a compound will result in a decrease in luciferase activity of Jurkat cells transfected with the reporter construct.
Materials
Jurkat cell line
For the luciferase reporter plasmid, the 3 Kb human IL17 promoter containing the RORy- specific CNS enhancer element was PCR amplified from human genomic DNA and cloned into a pGL4-Luc2/hygro reporter plasmid sequencially as Xhol-Hindlll (1.1 Kb) and Kpnl-Xhol (1.9 Kb) fragments. For the 1.1 Kb fragment, PCR was used to amplify human IL17 proximal promoter region from genomic DNA of 293T cells using primers as follows: forward primer, 5'- CTCG AGT AG AGCAGGAC AGGG AGG AA-3 ' (Xhol site is underlined) and reverse primer, 5'- AAGCTTGG ATGG ATG AGTTTGTGCCT-3 ' (Hindlll site is underlined). The 1.1 kb DNA bands were excised, purified, and inserted into pMD19-T Simple Vector (Takara). After DNA sequencing confirmation, the 1.1 kb DNA was digested with Xhol and Hindlll and inserted into Xhol/Hindlll sites of pGL4.31[luc2P/GAL4UAS/Hygro] (Promega) to generate the pIL17-lkb-luc reporter construct. For the 1.9 Kb fragment, PCR was used to amplify human IL17 promoter region from genomic DNA using primers as follows: forward primer, 5'-
GGT ACCTGCCCTGCTCT ATCCTG AGT-3 ' (Kpnl site is underlined) and reverse primer, 5'- CTCG AGTGGTGAGTGCTG AG AGATGG-31 (Xhol site is underlined). The resulting 1.9 kb DNA bands were excised, gel purified, and cloned into a MD19-T Simple Vector (Takara). DNA sequencing analysis revealed that there were three point mutations but none of which affected RORy binding. The 1.9 kb DNA fragment was released by double digestion with Kpnl and Xhol and inserted into pIL17-lkb-luc to generate the luciferase reporter plasmid "pIL17-3kb-CNS-luc." To overexpress RORyt, the full-length cDNA of human RORyt identical to the published sequence NM_001001523 was cloned into pcDNA3.1 at the Kpnl-Notl cloning sites to generate the RORyt overexpression plasmid "CDNA3.1DhRORy49-8".
The luciferase reporter plasmid and the RORyt overexpression plasmid were transfected into Jurkat cell line and a stable clone was identified. The stable clone was grown in 10% dialyzed FBS in RPMI (1640) with 800ug/ml geneticin and 400ug/ml hygromecin.
Assay
Compounds were dissolved in DMSO at three concentrations, lOmM, 400uM and 16uM, and were dispensed into 384-wells assay plate at 40nl, 12.5nl, 5nl respectively. The volume was adjusted with pure DMSO to a give a final uniform volume of 40 nl Jurkat cells described above were counted and centrifuged. The growth medium was discarded and the cells were resuspended with assay medium (phenol red free RPMI) at lE-6/ml. Cells were added to each of the compounds in the assay plates. Cells were either untreated or treated with CD3 microbeads (Miltenyi Biotec) at 1 ul beads per 500,000 cells. Cells were culture overnight and luciferase assay (Promega) was performed. Data were collected by ViewLux (using luciferase greiner 384 setting).
Thl7 ELISA/Intracellular Staining Studies
ELISA
Mouse CD4+ cells were purified using the CD4+ T Cell Isolation II Kit according to manufacturer's instructions (Miltenyi Biotec). 96 well plates were pre-coated with anti-CD3 antibody. Un-coated wells were used as controls. CD4+ Cells were resuspended in RPMI complete medium and were added to the 96-well plates at 3E5 cells/well, with the total volume being 90 ul. Cytokine cocktail and 20ul of each compound were then added to the wells (DMSO final volume 0.1%). The final concentrations of antibodies (R&D Systems) and cytokines (R&D Systems) were: anti-mCD3, 5ug ml; anti-mCD28, 2ug ml; anti-mlFNy, lOug/ml; Anti-mIL4, lOug/ml; mIL-6, 20ng/ml; mIL-23, lOng ml; mIL-Ιβ, lOng ml; TGF-β, lOng/ml, The culture was incubated in 37°C for 3 days and supernatants were collected for ELISA. The IL-17 ELISAs were performed according to manufacturer's instructions (R&D Systems).
Intracellular staining
The Thl 7 differentiation culture described above was maintained for 5 days and cells were analyzed by IL-17 and IFN-γ intracellular staining according to manufacturer's instructions (BD Biosciences).
Assay Data
The data described below represents a mean pIC50 value of multiple test results if the test was performed more than once. It is understood that the data illustrated below may have reasonable variation depending on the specific conditions and procedures used by the person conducting the testing.
As shown in the Table below, all exemplified compounds (Examples 1-35) were tested in the dual FRET assay described above and were found to have a pIC50 between 7 and 9.
As shown in the Table below, all exemplified compounds (Examples 1-35) were tested in the Jurkat cell luciferase assay described above and were found to have a pIC50 between 7 and 9.
As shown in the Table below, all exemplified compounds except Examples 17, 19-21 and 29- 31 were tested in the Thl 7 ELISA assay described above and were found to have a pIC50 greater than 6.
Example ROR Dual FRET Assay Jurkat Cell Luciferase Assay Thl7 Assay
No (pICSO) (pICSO) (pICSO)
1 7.9 7.5 7.1
2 8.2 8.4 7.6
3 8.3 8.3 7.6
4 8.0 8.5 7.7
5 8.3 8.1 7.1
6 8.1 7.6 7.1
7 8.2 8.1 7.0
8 8.2 7.9 7.1
9 8.1 8.0 6.7
10 8.4 8.4 7.2
11 8.1 8.4 6.9
12 8.1 8.2 7.1
13 8.0 8.4 7.4
14 8.1 8.6 7.5
15 8.3 8.3 6.2
16 8.0 8.3 7.4
17 8.2 8.2
18 8.0 8.1 6.7
19 8.2 7.6
20 8.1 8.4
21 7.7 8.4
22 8.0 7.5 6.8
23 8.2 8.8 7.6
24 8.0 8.4 7.4
25 8.1 8.4 6.7
26 8.1 8.4 7.1
27 8.0 8.7 8.5
28 8.1 8.2 7.2
29 8.1 8.5
30 8.1 7.7
31 8.1 7.1
32 8.0 8.1 7.6
33 8.1 8.6 8.1
34 8.0 8.2 6.3
35 7.8 7.8 7.7
EAE Studies
Experimental Autoimmune Encephalomyelitis (EAE) is an animal model of multiple sclerosis. The ability of a test compound to ameliorate EAE was measured in the EAE studies. Wild- type mice of the C57BL/6 (B6) strain were obtained from Shanghai Laboratory Animal Resource Center. EAE was induced by intravenous injections of 100 ng of pertussis toxin (List Biological Laboratories) and then subcutaneous immunization with 200 μΐ of an emulsion composed of MOG35. 55 peptide (300 μg mouse) in PBS and an equal volume of complete Freund's adjuvant containing 5 mg/ml heat-killed Mycobacterium tuberculosis H37Ra (Difco Laboratories) on day 0, followed by another intravenous injections of 100 ng of pertussis toxin on day 2 as described previously (Wang et al. (2006) J. Clin. Invest. 116: 2434-2441). Each compound was given orally on day 0 at 100 mg kg twice a day. Mice were scored for disease severity daily using a EAE scoring system (Wang et al. (2006) J. Clin. Invest. 116: 2434-2441): 0, no overt signs of disease; 1, limp tail or hind limb weakness but not both; 2, limptail and paraparesis (weakness, incomplete paralysis of one or two hind limbs); 3, paraplegia (complete paralysis of two hind limbs); 4, paraplegia with forelimb weakness or paralysis; and 5, moribund state or death. Clinical score data can be expressed as means ± s.e.m.
Example 2 was tested and found to delay EAE onset.
CIA Studies
Collagen-induced arthritis (CIA) is an animal model of rheumatoid arthritis. CIA was induced in 8-week old male DBA/1 mice via an initial intradermal (i.d.) injection of an emulsion consisting of bovine type II collagen in CFA. Mice were intraperitoneally (i.p.) injected with bovine type II collagen 21 days later to boost the immune system, resulting in chronic inflammation in both the hind and the front paws. Each compound was given to the mice at lOOmg kg twice a day starting from day 20 after the first immunization. Mice were examined for onset and severity of disease in a blinded manner. Arthritis symptoms were graded by the following scoring system: grade 0, normal appearance; grade 1 , slight erythema/ edema (1-3 digits); grade 2, erythema/ edema in more than 3 digits or mild swelling in ankle/wrist joint; grade 3, erythema edema in entire paw; grade 4, massive erythema/ edema of entire paw extending into proximal joints, ankylosis, loss of function. Each limb was graded, giving a maximum possible score of 16 per mouse. Clinical score data were expressed as means ± s.e.m. Foot volume of the mice was detennined using a YLS-7B foot volume measuring instrument (Shandong Academy of Medical Science).
Example 2 and Example 4 were tested and found to reduce disease severity in CIA mice.
Methods of Use
The compounds of the invention are modulators of RORy and can be useful in the treatment of diseases mediated by RORy, particularly autoimmune or inflammatory diseases. The Inflammatory or autoimmune diseases of the invention include multiple sclerosis, rheumatoid arthritis, psoriasis, Crohn's disease, inflammatory bowel disease, Sjorgen's syndrome, optic neuritis, chronic obstructive pulmonary disease, asthma, type I diabetes, neuromyelitis optica, Myasthenia Gavis, uveitis, Guillain- Barre syndrome, psoriatic arthritis, Gaves' disease and allergy. Accordingly, in another aspect the invention is directed to methods of treating such diseases.
The methods of treatment of the invention comprise administering a safe and effective amount of a compound according to Formula I or a pharmaceutically-acceptable salt thereof to a patient in need thereof.
As used herein, "treat" in reference to a condition means: (I) to ameliorate or prevent the condition or one or more of the biological manifestations of the condition, (2) to interfere with (a) one or more points in the biological cascade that leads to or is responsible for the condition or (b) one or more of the biological manifestations of the condition, (3) to alleviate one or more of the symptoms or effects associated with the condition, or (4) to slow the progression of the condition or one or more of the biological manifestations of the condition.
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 treat the patient's condition 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 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 to be treated; the duration of the treatment; the nature of concurrent therapy; the desired therapeutic effect; and like factors, but can nevertheless be routinely 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 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 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 may vary depending upon the particular route of administration chosen. Typical daily dosages for oral administration range from 0.1 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.
In one embodiment, the invention relates to the use of the compounds of the invention in the preparation of a medicament for the treatment of diseases mediated by RORy. In another embodiment, the invention relates to the compounds of the invention for use in the treatment of diseases mediated by RORy. Examples of such diseases include autoimmune or inflammatory diseases such as multiple sclerosis, rheumatoid arthritis, psoriasis, Crohn's disease, inflammatory bowel disease, Sjorgen's syndrome, optic neuritis, chronic obstructive pulmonary disease, asthma, type I diabetes, neuromyelitis optica, Myasthenia Gavis, uveitis, Guillain-Barre syndrome, psoriatic arthritis, Gaves' disease and allergy.
Compositions
The compounds of the invention will normally, but not necessarily, be formulated into pharmaceutical compositions prior to administration to a patient. Accordingly, in another aspect the invention is directed to pharmaceutical compositions comprising a compound of the invention and one or more 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 or syrups. 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 0.1 mg to 1000 rag.
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.
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 excipient or excipients 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 dry powders, aerosols, suspensions, 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 of 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 Reminigton'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.

Claims

What is Claims is:
1. A compound of Formula I or a pharmaceutically acceptable salt thereof
Figure imgf000056_0001
Formula I
wherein:
each Rl is selected from the group consisting of:
- halo;
- CN;
- OH;
- C1-C3 alkoxy optionally substituted with one to three F; and
- C1-C3 alkyl optionally substituted with one to three F;
each R2 is selected from the group consisting of:
- halo;
- CN;
- OH;
- C1-C3 alkoxy optionally substituted with one to three F; and
- C1 -C3 alkyl optionally substituted with one to three F;
m is 0, 1 or 2;
n is 0, 1 or 2;
R3 is H or Cl-C3 alkyl;
R4 is H or Cl-C3 alkyl;
R5 is selected from the group consisting of:
- C1-C6 alkyl optionally substituted with one to three F, OH or C1-C3 alkoxy; and
- NHRa wherein Ra is C1-C6 alkyl.
2. A compound or salt according to claim 1, wherein m is 0.
3. A compound or salt according to claim 1 , wherein m is 1.
4. A compound or salt according to claim 3, wherein l is CI or F.
5. A compound or salt according to claim 3, wherein Rl is CN or CF3.
6. A compound or salt according to any of claims 1 to 5, wherein n is 0.
7. A compound or salt according to any of claims 1 to 5, wherein n is 1.
8. A compound or salt according to claim 7, wherein R2 is CI or F.
9. A compound or salt according to claim 7, wherein R2 is methoxy.
10. A compound or salt according to any of claims 1 to 9, wherein R3 is H or methyl.
1 1. A compound or salt according to any of claims 1 to 10, wherein R4 is H or methyl.
12. A compound or salt according to any of claims 1 to 1 1 , wherein R5 is methyl or ethyl.
13. A pharmaceutical composition which comprises a compound according to any of claims 1 to 12 and a pharmaceutically acceptable carrier or excipient.
14. A method for treating multiple sclerosis which comprises administering to a host in need thereof a safe and effective amount of a compound according to Formula I or a pharmaceutically acceptable salt thereof according to any one of claims 1 to 12.
15. A method for treating rheumatoid arthritis which comprises administering to a host in need thereof a safe and effective amount of a compound according to Formula I or a pharmaceutically acceptable salt thereof according to any one of claims 1 to 12.
PCT/CN2012/070676 2011-01-24 2012-01-20 Retinoid-related orphan receptor gamma modulators, composition containing them and uses thereof WO2012100732A1 (en)

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