Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
  • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
  • A61K31/506—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim not condensed and containing further heterocyclic rings
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
  • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
  • A61K31/4427—Non condensed pyridines; Hydrogenated derivatives thereof containing further heterocyclic ring systems
  • A61K31/444—Non condensed pyridines; Hydrogenated derivatives thereof containing further heterocyclic ring systems containing a six-membered ring with nitrogen as a ring heteroatom, e.g. amrinone
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
  • A61K31/5375—1,4-Oxazines, e.g. morpholine
  • A61K31/5377—1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/54—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame
  • A61K31/541—Non-condensed thiazines containing further heterocyclic rings
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
  • A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
  • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
  • C07D471/04—Ortho-condensed systems
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2300/00—Mixtures or combinations of active ingredients, wherein at least one active ingredient is fully defined in groups A61K31/00 - A61K41/00

Definitions

• the present invention relates to compounds, compositions and methods for inhibiting Enhancer of Zeste Homolog (EZH2) , Polycomb Repressive Complex 2 (PRC2) , or a combination thereof.
• EZH2 Enhancer of Zeste Homolog
• PRC2 Polycomb Repressive Complex 2
• the site specific lysine methylation on histones is one of the important epigenetic mechanisms in controlling and mediating many fundamental biological processes.
• the Polycomb Repressive Complex 2 (PRC2) methylates the histone H3 lysine 27 (H3K27) at the genomic region of target genes, and thereby represses gene transcription.
• PRC2 requires minimally three core subunits including SUZ12 (suppressor of zeste 12) , EED (embryonic ectoderm development) and the catalytic subunit EZH1 or EZH2 (enhancer of zeste homolog 1/2) .
• EZH1 and EZH2 are homolog proteins and can both be integrated into PRC2 respectively, although with different tissue-and temporal distribution.
• EZH2 can directly bind the cofactor S-adenosyl methionine (SAM) and transfer the methyl group to histone H3K27 site to form mono-, di-, and tri-methylated lysine (H3K27me1, H3K27me2 and H3K27me3) , which repress gene transcription.
• SAM S-adenosyl methionine
• PRC2-EZH2 has higher activity than PRC2-EZH1, which predominantly catalyzes formation of H3K27me1 and some H3K27me2.
• EED may bind H3K27me2/3 and allosterically activate enzyme activity of PRC2 to promote spreading of the repressive marks.
• EZH2 plays a critical function in development and adult tissue homeostasis, and is closely associated with many diseases. EZH2, SUZ12 and EED are overexpressed in many cancers, including but not limited to breast cancer, prostate cancer and hepatocellular carcinoma. EZH2 activating mutations, which lead to increased H3K27me3, have been identified in DLBCL (diffuse large B cell lymphoma) , FL (follicular lymphoma) , melanoma, and parathyroid adenocarcinoma patients.
• DLBCL diffuse large B cell lymphoma
• FL follicular lymphoma
• melanoma melanoma
• parathyroid adenocarcinoma patients have been identified in DLBCL (diffuse large B cell lymphoma) , FL (follicular lymphoma) , melanoma, and parathyroid adenocarcinoma patients.
• EZH2 inhibitors may release the repression of Th1 chemokines in tumor cells and enhance T cell infiltration in ovarian and colorectal cancers.
• EZH2 provides a pharmacological target for DLBCL and other cancers.
• EZH2 also plays important roles in auto-immune diseases and other disorders. Together, there is a high need for small molecules that inhibit the activity of EZH2.
• the present invention provides compounds that inhibit EZH2; and compositions and methods for treating or preventing a disease or condition mediated by EZH2, PRC2, or a combination thereof.
• the present invention provides a compound of Formula (I) , or a stereoisomer, enantiomer, enantiomeric mixture or pharmaceutically acceptable salt thereof:
• Y is N or CR 4 ;
• R 1 , R 3 and R 4 are independently H, halogen or -C 1 -C 4 alkyl
• R 5a , R 5b , R 5c , R 5d and R c are independently H or -C 1 -C 4 alkyl;
• R 6 , R 7 , R 8 and R 9 are independently H, halogen or -C 1 -C 4 alkyl
• R 10 is H, halogen, -C 1 -C 4 alkyl, -C 1 -C 4 alkoxy, -C 1 -C 4 haloalkoxy or -NH (C 1 -C 4 alkyl) ;
• R 11 is H, -C 1 -C 4 alkyl, -SO 2 (C 1 -C 4 alkyl) , -hydroxyC 1 -C 4 alkylene, -cyanoC 1 -C 4 alkylene or -C 1 -C 4 alkyl substituted with -C 1 -C 4 alkoxy;
• R 12 is H or -C 1 -C 4 alkyl
• R 13 is H, halogen, -CN, -OH, -C 1 -C 4 alkyl or –hydroxyC 1 -C 4 alkylene;
• R 14 is H, halogen or -C 1 -C 4 alkyl
• R 16 if present, is halogen, -CN, -OH, -C 1 -C 4 alkyl or -hydroxyC 1 -C 4 alkylene;
• n 0, 1 or 2;
• each n is independently selected from 1 and 2;
• the compound of Formula (I) is not (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) (4-methylpiperazin-1-yl) methanone.
• the invention provides a pharmaceutical composition
• a pharmaceutical composition comprising a compound of Formula (I) or sub-formulae thereof, or a stereoisomer, enantiomer, enantiomeric mixture or pharmaceutically acceptable salt thereof; and one or more pharmaceutically acceptable carriers.
• the invention provides a combination, in particular a pharmaceutical combination, comprising a compound of Formula (I) or sub-formulae thereof, or a stereoisomer, enantiomer, enantiomeric mixture or pharmaceutically acceptable salt thereof; and one or more therapeutically active agent (s) .
• the compounds of the invention can be used for treating or preventing a disease or condition mediated by EZH2, PRC2 or a combination thereof.
• the present invention provides compositions and methods for treating or preventing a disease or condition mediated by EZH2, PRC2 or a combination thereof.
• -C 1 -C 6 alkyl or “-C 1-6 alkyl” refer to a straight or branched hydrocarbon chain radical consisting solely of carbon and hydrogen atoms, containing no unsaturation, having from one to six carbon atoms, and which is attached to the rest of the molecule by a single bond.
• -C 1 -C 4 alkyl or “-C 1-4 alkyl” are to be construed accordingly.
• Examples of -C 1 -C 6 alkyl include, but are not limited to, methyl, ethyl, n-propyl, 1-methylethyl (iso-propyl) , n-butyl, n-pentyl and 1, 1-dimethylethyl (t-butyl) .
• -C 1 -C 4 alkoxy refers to a radical of the formula -OR a where R a is a C 1-4 alkyl radical as generally defined above.
• Examples of C 1-6 alkoxy include, but are not limited to, methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, pentoxy, and hexoxy.
• cycloalkyl refers to a saturated, monocyclic, fused bicyclic, fused tricyclic or bridged polycyclic ring system.
• fused bicyclic or bridged polycyclic ring systems include bicyclo [1.1.1] pentane, bicyclo [2.1.1] hexane, bicyclo [2.2.1] heptane, bicyclo [3.1.1] heptane, bicyclo [3.2.1] octane, bicyclo [2.2.2] octane and adamantanyl.
• C 3 -C 6 cycloalkyl refers to a saturated monocyclic group having at least 3, and at most 6, carbon atoms.
• Non-limiting examples of such “C 3 -C 6 cycloalkyl” groups include cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl groups.
• Halo or “halogen” refer to bromo, chloro, fluoro or iodo.
• -hydroxyC 1-4 alkylene refers to a -C 1-4 alkyl radical as defined above, wherein one or more hydrogen atoms of the C 1-4 alkyl radical is replaced by OH.
• hydroxyC 1-4 alkyl include, but are not limited to, ethan-1-olyl, 2-methylpropan-1-olyl, hydroxy-methyl, 2-hydroxy-ethyl, 2-hydroxy-propyl and 3-hydroxy-propyl.
• -cyanoC 1-4 alkylene refers to a -C 1-4 alkyl radical as defined above, wherein one of the hydrogen atoms of the -C 1-4 alkyl radical is replaced by CN.
• haloalkoxy refers to a haloalkyl linked to an oxygen, which may also be represented as –O-R’, wherein the R’ represents the haloalkyl group.
• R represents the haloalkyl group.
• -C 1 -C 4 haloalkoxy is intended to include C 1 , C 2 , C 3 and C 4 haloalkoxy groups.
• haloalkoxy groups include, but are not limited to, fluoromethoxy, difluoromethoxy, trifluoromethoxy, chloromethoxy, dichloromethoxy, trichloromethoxy, pentafluoroethoxy, pentachloroethoxy, 2, 2, 2-trifluoroethoxy, heptafluoropropoxy, heptachloropropoxy, difluorochloromethoxy, dichlorofluoromethoxy, difluoroethoxy, trifluoroethoxy, difluoropropoxy, dichloroethoxy and dichloropropoxy.
• heterocyclyl or “heterocyclic” refers to a stable 4-7 membered non-aromatic monocyclic ring radical comprising 1, 2, or 3, heteroatoms individually selected from nitrogen, oxygen and sulfur.
• the heterocyclyl radical may be bonded via a carbon atom or heteroatom.
• the term “5-6 membered heterocyclyl” is to be construed accordingly.
• heterocyclyl examples include, but are not limited to, azetidinyl, oxetanyl, pyrrolinyl, pyrrolidyl, tetrahydrofuryl, tetrahydrothienyl, piperidyl, piperazinyl, tetrahydropyranyl or morpholinyl or perhydroazepinyl.
• heteroaryl refers to a 5-9 membered aromatic monocyclic or fused ring radical comprising 1, 2, 3 or 4 heteroatoms individually selected from nitrogen, oxygen and sulfur.
• the heteroaryl radical may be bonded via a carbon atom or heteroatom.
• the term “5-6 membered heteroaryl” is to be construed accordingly.
• Examples of 5-6 membered monocyclic heteroaryls include, but are not limited to, furyl, pyrrolyl, thienyl, pyrazolyl, imidazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, triazolyl, tetrazolyl, pyrazinyl, pyridazinyl, pyrimidyl or pyridyl.
• fused heteroaryls include but are not limited to 9-membered heteroaryls such as benzofuranyl; 2, 3-dihydrobenzofuranyl, 1, 3-dihydroisobenzofuranyl; benzo [d] [1, 3] dioxol-5-yl; imidazo [1, 2-a] pyridinyl; pyrazolo [1, 5-a] pyridineyl; 1H-indazolyl and 1H-benzo [d] -imidazolyl.
• 9-membered heteroaryls such as benzofuranyl; 2, 3-dihydrobenzofuranyl, 1, 3-dihydroisobenzofuranyl; benzo [d] [1, 3] dioxol-5-yl; imidazo [1, 2-a] pyridinyl; pyrazolo [1, 5-a] pyridineyl; 1H-indazolyl and 1H-benzo [d] -imidazolyl.
• PRC2 refers to Polycomb Repressive Complex 2.
• PRC2-mediated disease or condition refers to a disease or condition that is directly or indirectly regulated by PRC2. This includes, but is not limited to, any disease or condition which is directly or indirectly regulated by EZH2.
• EZH2 Enhancer of Zeste Homolog
• PRC2 Polycomb Repressive Complex 2
• PRC2 Enhancer of Zeste Homolog 2
• PRC2 Polycomb Repressive Complex 2
• PRC2 or EZH2/PRC2 refer to a disease or condition that is directly or indirectly regulated by EZH2, PRC2 or EZH2 and PRC2.
• the term “subject” refers to mammals, primates (e.g., humans, male or female) , dogs, rabbits, guinea pigs, pigs, rats and mice.
• the subject is a primate. In yet other embodiments, the subject is a human.
• the term “inhibit” refers to the reduction or suppression of a given condition, symptom, or disorder, or disease, or a significant decrease in the baseline activity of a biological activity or process.
• the term “treat” , “treating” or “treatment” of any disease or disorder refers to alleviating or ameliorating the disease or disorder (i.e., slowing or arresting the development of the disease or at least one of the clinical symptoms thereof) ; or alleviating or ameliorating at least one physical parameter or biomarker associated with the disease or disorder, including those which may not be discernible to the patient.
• the term “prevent” refers to the prophylactic treatment of the disease or disorder; or delaying the onset or progression of the disease or disorder
• a subject is “in need of” a treatment if such subject would benefit biologically, medically or in quality of life from such treatment.
• a therapeutically effective amount of a compound of the present invention refers to an amount of the compound of the present invention that will elicit the biological or medical response of a subject, for example, reduction or inhibition of an enzyme or a protein activity, or ameliorate symptoms, alleviate conditions, slow or delay disease progression, or prevent a disease, etc.
• composition refers to a compound of the invention, or a pharmaceutically acceptable salt thereof, together with at least one pharmaceutically acceptable carrier, in a form suitable for oral or parenteral administration.
• the term "pharmaceutically acceptable carrier” refers to a substance useful in the preparation or use of a pharmaceutical composition and includes, for example, suitable diluents, solvents, dispersion media, surfactants, antioxidants, preservatives, isotonic agents, buffering agents, emulsifiers, absorption delaying agents, salts, drug stabilizers, binders, excipients, disintegration agents, lubricants, wetting agents, sweetening agents, flavoring agents, dyes, and combinations thereof, as would be known to those skilled in the art (see, for example, Remington The Science and Practice of Pharmacy, 22 nd Ed. Pharmaceutical Press, 2013, pp. 1049-1070) .
• the term “compounds of the present invention” or “compound of the present invention” refers to compounds of Formula (I) and subformulae thereof, including Formula (II) and subformulae thereof, and exemplified compounds and salts thereof; as well as stereoisomers (including diastereoisomers and enantiomers) , rotamers, tautomers, isotopically labeled compounds (including deuterium substitutions) , and inherently formed moieties.
• the “compounds of the present invention” further includes N-oxide derivatives of such compounds.
• the present invention provides compounds that inhibit EZH2; and compositions and methods for treating or preventing a condition mediated by EZH2, PRC2 or a combination thereof.
• Embodiment 1 A compound of Formula (I) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; as described above.
• Embodiment 2 A compound of Formula (I) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof;
• R 11 is H, -C 1 -C 4 alkyl, -SO 2 (C 1 -C 4 alkyl) or -C 1 -C 4 alkyl substituted with one R b ;
• each R 13 is independently selected from H, halogen, CN, -OH, and -C 1 -C 4 alkyl substituted with 0-1 –OH groups;
• R a is -OH, -CH 2 OH, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, or -N (C 1 -C 4 alkyl) 2 ;
• R b is independently selected from -CN, -OH and C 1 -C 4 alkoxy;
• n 0, 1 or 2;
• each n is independently selected from 1 and 2.
• Embodiment 3 A compound according to Embodiment 1 or Embodiment 2, wherein said compound is of Formula (I-2) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof:
• Embodiment 4 A compound according to Embodiment 1 or Embodiment 2, wherein said compound is of Formula (I-3) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof:
• Embodiment 5 A compound according to Embodiment 1 or Embodiment 2, wherein said compound is of Formula (I-4) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof:
• Embodiment 6 A compound according to Embodiment 1 or Embodiment 2, wherein said compound is of Formula (I-5) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof:
• Embodiment 7 A compound according to Embodiment 1 or Embodiment 2, wherein said compound is of Formula (I-6) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof:
• Embodiment 8 A compound according to Embodiment 1 or Embodiment 2, wherein said compound is of Formula (I-7) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof:
• R a , R b and R c are as defined in Embodiment 2.
• R a , R b and R c are as defined in Embodiment 2.
• R a and R b are as defined in Embodiment 2.
• R a is as defined in Embodiment 2.
• Embodiment 13 A compound according to any one of Embodiments 1-2 and 9-12, or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; wherein R 12 is H or -CH 3 .
• Embodiment 14 A compound according to any one of Embodiments 1-13, or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; wherein R 2 is
• R a is as defined in Embodiment 2.
• Embodiment 15 A compound according to any one of Embodiments 2-14, or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; wherein R a is -OH or -OCH 3 .
• Embodiment 17 A compound according to Embodiment 16, or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; wherein R 15 is a 4-to 6-membered heterocycoalkyl having 1-2 heteroatoms independently selected from O, S and N; wherein said 4-to 6-membered heterocycloalkyl is unsubstituted or substituted with one substituent selected from -OH, -CH 2 OH, -C 1 -C 4 alkyl, -C 1 -C 4 alkoxy and -N (C 1 -C 4 alkyl) 2 .
• Embodiment 18 A compound according to Embodiment 16, or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; wherein R 15 is
• R 16 if present, is halogen, -CN, -OH, -C 1 -C 4 alkyl or -hydroxyC 1 -C 4 alkylene;
• n 0, 1 or 2.
• Embodiment 19 A compound according to Embodiment 16, or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; wherein R 15 is
• Embodiment 21 A compound according to any one of Embodiments 1-19, or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; wherein R 2 is
• Embodiment 22 A compound according to Embodiment 1, wherein said compound is of Formula (II) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof;
• Y is CH or N
• R 1 , R 3 , R 5a , R 5b , R 5c and R 5d are independently H or -C 1 -C 4 alkyl;
• R 6 , R 7 , R 8 and R 9 are independently is H, halogen or -C 1 -C 4 alkyl
• R 10 is halogen or –C 1 -C 4 alkoxy
• R 11 is H, C 1 -C 4 alkyl, -hydroxyC 1 -C 4 alkylene or -cyanoC 1 -C 4 alkylene;
• R 13 is H, halogen, -OH, -C 1 -C 4 alkyl or –hydroxyC 1 -C 4 alkylene;
• R 14 is H, halogen or -C 1 -C 4 alkyl
• R 15 is a 4-to 6-membered heterocycloalkyl having 1-2 heteroatoms independently selected from O, S and N; and wherein said 4-to 6-membered heterocycloalkyl is unsubstituted or substituted with 1-2 substituents selected from -OH, -C 1 -C 4 alkyl, -hydroxyC 1 -C 4 alkylene, -C 1 -C 4 alkoxy and -N (C 1 -C 4 alkyl) 2 .
• Embodiment 23 A compound according to Embodiment 22, wherein said compound is of Formula (II-1) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof;
• Embodiment 24 A compound according to Embodiment 22, wherein said compound is of Formula (II-2) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof;
• Embodiment 25 A compound according to Embodiment 22, wherein said compound is of Formula (II-3) , or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof;
• Embodiment 26 A compound according to any one of Embodiments 1-2, 9-19 and 22-25, or a stereoisomer, enantiomer, enantiomeric mixture of a pharmaceutically acceptable salt thereof; wherein R 11 is H, -C 1 -C 4 alkyl or -C 1 -C 4 alkyl substituted with one R b ; and R b is -CN, -OH or -OCH 3 .
• Embodiment 27 A compound according to any one of Embodiments 1-2, 9-19 and 22-26, or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; wherein R 13 is H, F, -CN, -OH, -CH 3 or -CH 2 OH.
• Embodiment 28 A compound according to any one of Embodiments 1-2, 9-19 and 22-27, or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; wherein R 14 is H, F or -CH 3 .
• Embodiment 29 A compound according to any one of Embodiments 1-2, 9-19 and 22-28, or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; wherein R 15 is azetidinyl or oxetanyl, each of which is unsubstituted or substituted with -OH, -C 1 -C 4 alkyl or -hydroxyC 1 -C 4 alkylene.
• Embodiment 30 A compound according to Embodiment 29, or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof; wherein R 15 is
• R 16 if present, is -C 1 -C 4 alkyl; and m is 0-1. In a particular embodiment, R 15 is
• Embodiment 31 A compound according to Embodiment 1, wherein said compound is selected from Examples C1 to C22 and Examples C24 to C77; or a pharmaceutically acceptable salt thereof
• Embodiment 32 A compound according to Embodiment 1, wherein said compound is selected from:
• Embodiment 33 A compound according to Embodiment 1, wherein said compound is selected from Examples C1-C7, C9, C12-C21 and Examples C25-C77; or a pharmaceutically acceptable salt thereof.
• Embodiment 34 A compound according to Embodiment 1 or Embodiment 22, wherein said compound is selected from Examples C13, C36-C37, C42, C49, C51-57 and C72-C77; or a pharmaceutically acceptable salt thereof.
• Embodiment 35 A compound according to Embodiment 1 or Embodiment 22, wherein said compound is 2- (2- ( ( (4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) acetamide; or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof.
• Embodiment 36 A compound according to Embodiment 1 or Embodiment 22, wherein said compound is 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) acetamide; or a pharmaceutically acceptable salt thereof.
• the compound is also known as 2- (2- ( ( ( (1r, 4r) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) acetamide (Example C36) .
• Embodiment 37 A compound according to Embodiment 1 or Embodiment 22, wherein said compound is 2- (2- ( ( (4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) propanamide; or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof.
• Embodiment 38 A compound according to Embodiment 1 or Embodiment 22, wherein said compound is 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) propanamide; or a stereoisomer, enantiomer, enantiomeric mixture or a pharmaceutically acceptable salt thereof.
• the compound is also known as 2- (2- ( ( ( (1r, 4r) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) propanamide (Example C52) .
• Embodiment 39 A compound according to Embodiment 1 or Embodiment 22, wherein said compound is (S) -2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) propanamide; or a pharmaceutically acceptable salt thereof.
• the compound is also known as (S) -2- (2- ( ( ( (1r, 4S) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) propanamide (Example C53) .
• Embodiment 40 A compound according to Embodiment 1 or Embodiment 22, wherein said compound is (R) -2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) propanamide; or a pharmaceutically acceptable salt thereof.
• the compound is also known as (R) -2- (2- ( ( ( (1r, 4R) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) propanamide (Example C54) .
• Embodiment 41 A pharmaceutical composition comprising a compound according to any one of Embodiments 1-40 and one or more pharmaceutically acceptable carrier.
• Embodiment 42 A combination comprising a compound according to any one of Embodiments 1-40 and one or more additional therapeutically active agent.
• Embodiment 43 The combination according to Embodiment 42, wherein said one or more additional therapeutically active agent is an anti-cancer agent, an analgesic, an anti-inflammatory agent, immunomodulator, or a combination thereof.
• Embodiment 44 A compound according to any one of Embodiments 1-40 and optionally in combination with a second therapeutic agent, for use in treating a disease or condition mediated by EZH2, PRC2 or EZH2/PRC2.
• Embodiment 45 The compound according to Embodiment 44, wherein said second therapeutic agent is an anti-cancer agent, an analgesic, an anti-inflammatory agent or a combination thereof.
• Embodiment 46 Use of a compound according to any one of Embodiments 1-40 and optionally in combination with a second therapeutic agent, in the manufacture of a medicament for a disease or condition mediated by EZH2, PRC2 or EZH2/PRC2.
• Embodiment 47 A method for treating a disease or condition mediated by EZH2, PRC2 or EZH2/PRC2, comprising administering to a subject in need thereof, a therapeutically effective amount of a compound according to any one of Embodiments 1-40 and optionally in combination with a second therapeutic agent; thereby treating said disease or condition mediated by EZH2, PRC2 or EZH2/PRC2.
• Embodiment 48 A method for treating a disease or condition that benefit from or is treatable by inhibition of EZH2, PRC2 or EZH2/PRC2, comprising administering to a subject in need thereof, a therapeutically effective amount of a compound according to any one of Embodiments 1-40 and optionally in combination with a second therapeutic agent; thereby treating said disease or condition that benefit from or is treatable by inhibition by EZH2, PRC2, or EZH2/PRC2.
• Embodiment 49 The use of a compound according to Embodiment 46, or the method according to Embodiment 47 or 48, wherein said disease or condition mediated by EZH2, PRC2 or EZH2/PRC2, or said disease or condition that benefit from or is treatable by inhibition of EZH2, PRC2 or EZH2/PRC2, is diffuse large B cell lymphoma (DLBCL) , follicular lymphoma, leukemia, multiple myeloma, gastric cancer, malignant rhabdoid tumor, hepatocellular carcinoma, prostate cancer, breast carcinoma, bile duct and gallbladder cancers, bladder carcinoma, neuroblastoma, glioma, glioblastoma and astrocytoma, cervical cancer, colon cancer, melanoma, endometrial cancer, esophageal cancer, head and neck cancer, lung cancer, nasopharyngeal carcinoma, ovarian cancer, pancreatic cancer, renal cell carcinoma, rectal cancer
• Embodiment 50 The use of a compound according to Embodiment 46, or the method according to Embodiment 47 or 48, wherein said disease or condition mediated by EZH2, PRC2 or EZH2/PRC2, or said disease or condition that benefit from or is treatable by inhibition of EZH2, PRC2 or EZH2/PRC2, is diffuse large B cell lymphoma (DLBCL) , follicular lymphoma, leukemia, multiple myeloma, gastric cancer, malignant rhabdoid tumor, and hepatocellular carcinoma.
• DLBCL diffuse large B cell lymphoma
• the compounds can be present in the form of one of the possible stereoisomers or as mixtures thereof, for example as pure optical isomers, or as stereoisomer mixtures, such as racemates and diastereoisomer mixtures, depending on the number of asymmetric carbon atoms.
• the present invention is meant to include all such possible stereoisomers, including racemic mixtures, diasteriomeric mixtures and optically pure forms.
• Optically active (R) -and (S) -stereoisomers may be prepared using chiral synthons or chiral reagents, or resolved using conventional techniques.
• Substituents at atoms with unsaturated double bonds may, if possible, be present in cis- (Z) -or trans- (E) -form. If the compound contains a disubstituted cycloalkyl, the cycloalkyl substituent may have a cis-or trans-configuration.
• any asymmetric atom (e.g., carbon or the like) of the compound (s) of the present invention can be present in racemic or enantiomerically enriched, for example the (R) -, (S) -or (R, S) - configuration.
• each asymmetric atom has at least 50 %enantiomeric excess, at least 60 %enantiomeric excess, at least 70 %enantiomeric excess, at least 80 %enantiomeric excess, at least 90 %enantiomeric excess, at least 95 %enantiomeric excess, or at least 99 %enantiomeric excess in the (R) -or (S) -configuration.
• a compound of the present invention can be in the form of one of the possible stereoisomers, rotamers, atropisomers, tautomers or mixtures thereof, for example, as substantially pure geometric (cis or trans) stereoisomers, diastereomers, optical isomers (antipodes) , racemates or mixtures thereof.
• Any resulting mixtures of stereoisomers can be separated on the basis of the physicochemical differences of the constituents, into the pure or substantially pure geometric or optical isomers, diastereomers, racemates, for example, by chromatography and/or fractional crystallization.
• Any resulting racemates of compounds of the present invention or of intermediates can be resolved into the optical antipodes by known methods, e.g., by separation of the diastereomeric salts thereof, obtained with an optically active acid or base, and liberating the optically active acidic or basic compound.
• a basic moiety may thus be employed to resolve the compounds of the present invention into their optical antipodes, e.g., by fractional crystallization of a salt formed with an optically active acid, e.g., tartaric acid, dibenzoyl tartaric acid, diacetyl tartaric acid, di-O, O'-p-toluoyl tartaric acid, mandelic acid, malic acid or camphor-10-sulfonic acid.
• Racemic compounds of the present invention or racemic intermediates can also be resolved by chiral chromatography, e.g., high pressure liquid chromatography (HPLC) using a chiral adsorbent.
• any formula given herein is also intended to represent unlabeled forms as well as isotopically labeled forms of the compounds.
• lsotopically labeled compounds have structures depicted by the formulas given herein except that one or more atoms are replaced by an atom having a selected atomic mass or mass number.
• Isotopes that can be incorporated into compounds of the invention include, for example, isotopes of hydrogen.
• isotopes particularly deuterium (i.e., 2 H or D) may afford certain therapeutic advantages resulting from greater metabolic stability, for example increased in vivo half-life or reduced dosage requirements or an improvement in therapeutic index or tolerability.
• deuterium in this context is regarded as a substituent of a compound of Formula (I) or sub-formulae thereof.
• concentration of deuterium may be defined by the isotopic enrichment factor.
• isotopic enrichment factor as used herein means the ratio between the isotopic abundance and the natural abundance of a specified isotope.
• a substituent in a compound of this invention is denoted as being deuterium, such compound has an isotopic enrichment factor for each designated deuterium atom of at least 3500 (52.5%deuterium incorporation at each designated deuterium atom) , at least 4000 (60%deuterium incorporation) , at least 4500 (67.5%deuterium incorporation) , at least 5000 (75% deuterium incorporation) , at least 5500 (82.5%deuterium incorporation) , at least 6000 (90%deuterium incorporation) , at least 6333.3 (95%deuterium incorporation) , at least 6466.7 (97%deuterium incorporation) , at least 6600 (99%deuterium incorporation) , or at least 6633.3 (99.5%deuterium incorporation) .
• isotopic enrichment factor can be applied to any isotope in the same manner as described for deuterium.
• isotopes that can be incorporated into compounds of the invention include isotopes of hydrogen, carbon, nitrogen, oxygen, phosphorous, fluorine, and chlorine, such as 3 H, 11 C, 13 C, 14 C, 15 N, 18 F 31 P, 32 P, 35 S, 36 Cl, 123 I, 124 I, 125 I respectively. Accordingly it should be understood that the invention includes compounds that incorporate one or more of any of the aforementioned isotopes, including for example, radioactive isotopes, such as 3 H and 14 C, or those into which non-radioactive isotopes, such as 2 H and 13 C are present.
• Such isotopically labelled compounds are useful in metabolic studies (with 14 C) , reaction kinetic studies (with, for example 2 H or 3 H) , detection or imaging techniques, such as positron emission tomography (PET) or single-photon emission computed tomography (SPECT) including drug or substrate tissue distribution assays, or in radioactive treatment of patients.
• PET positron emission tomography
• SPECT single-photon emission computed tomography
• an 18 F or labeled compound may be particularly desirable for PET or SPECT studies.
• Isotopically-labeled compounds of Formula (I) or sub-formulae thereof can generally be prepared by conventional techniques known to those skilled in the art or by processes analogous to those described in the accompanying examples using an appropriate isotopically-labeled reagents in place of the non-labeled reagent previously employed.
• the compounds of the present invention are either obtained in the free form, as a salt thereof.
• the terms “salt” or “salts” refers to an acid addition or base addition salt of a compound of the invention. “Salts” include in particular “pharmaceutical acceptable salts” .
• pharmaceutically acceptable salts refers to salts that retain the biological effectiveness and properties of the compounds of this invention and, which typically are not biologically or otherwise undesirable. In many cases, the compounds of the present invention are capable of forming acid and/or base salts by virtue of the presence of amino and/or carboxyl groups or groups similar thereto.
• Pharmaceutically acceptable acid addition salts can be formed with inorganic acids and organic acids.
• Inorganic acids from which salts can be derived include, for example, hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, and the like.
• Organic acids from which salts can be derived include, for example, acetic acid, propionic acid, glycolic acid, oxalic acid, maleic acid, malonic acid, succinic acid, fumaric acid, tartaric acid, citric acid, benzoic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid, toluenesulfonic acid, sulfosalicylic acid, and the like.
• Pharmaceutically acceptable base addition salts can be formed with inorganic and organic bases.
• Inorganic bases from which salts can be derived include, for example, ammonium salts and metals from columns I to XII of the periodic table.
• the salts are derived from sodium, potassium, ammonium, calcium, magnesium, iron, silver, zinc, and copper; particularly suitable salts include ammonium, potassium, sodium, calcium and magnesium salts.
• Organic bases from which salts can be derived include, for example, primary, secondary, and tertiary amines, substituted amines including naturally occurring substituted amines, cyclic amines, basic ion exchange resins, and the like.
• Certain organic amines include isopropylamine, benzathine, cholinate, diethanolamine, diethylamine, lysine, meglumine, piperazine and tromethamine.
• the present invention provides compounds of the present invention in acetate, ascorbate, adipate, aspartate, benzoate, besylate, bromide/hydrobromide, bicarbonate/carbonate, bisulfate/sulfate, camphorsulfonate, caprate, chloride/hydrochloride, chlorotheophyllinate, citrate, ethanedisulfonate, fumarate, gluceptate, gluconate, glucuronate, glutamate, glutarate, glycolate, hippurate, hydroiodide/iodide, isethionate, lactate, lactobionate, laurylsulfate, malate, maleate, malonate, mandelate, mesylate, methylsulphate, mucate, naphthoate, napsylate, nicotinate, nitrate, octadecanoate, oleate, oxalate, palmitate, pamo
• EZH2 is the catalytic subunit in PRC2; the other homolog, EZH1, is redundant with EZH2 in mouse and required for adult progenitor maintenance at EZH2-loss condition.
• Cofactor SAM-competitive or EED binding PRC2 inhibitors have been identified and represent variable selectivity on EZH2 compared with EZH1.
• targeting EZH2 of PRC2 selectively may offer a novel and unique angle to be advantageous to, or complementary to, directly targeting the SAM competitive or EED mechanisms of PRC2. Therefore, targeting EZH2 selectively represents a highly attractive strategy for the development of a novel therapy for the treatment of cancer.
• the compounds of the invention were assessed for their ability to inhibit PRC2 activity in a pentameric complex of EZH2/EZH1, SUZ12, EED, Rbap48 and AEBP in biochemical assays.
• the ability of compounds of the invention to inhibit cellular activity of PRC2 was assessed by analysing H3K27me3 in human cell lines.
• the ability of compounds of the invention to inhibit cancers was derived from their ability to modulate proliferation of human cancer cell lines bearing specific dependence to PRC2 activity to maintain cancerous growth.
• the compounds of the invention selectively target EZH2, with MOI distinct from the SAM-competitive inhibitors and the EED K27me3-pocket binders.
• the invention provides compounds of Formula (I) or subformulae thereof, or a pharmaceutically acceptable salt thereof, that are useful for therapy; particularly, for treating or preventing a disease or condition that is mediated by EZH2, PRC2 or a combination thereof, such as cancers that depend on PRC2 activity to maintain cancerous growth.
• the invention provides the use of a compound of Formula (I) or subformulae thereof, or a pharmaceutically acceptable salt thereof, for treating a disease or condition that benefit from or is treatable by inhibition of EZH2, PRC2 or a combination thereof; and for the manufacture of a medicament for treating a disease or condition that is treatable by inhibition of EZH2, PRC2 or a combination thereof.
• Examples of diseases or conditions that are mediated by EZH2, PRC2 or EZH2/PRC2, or that benefit from or are treatable by inhibition of EZH2, PRC2 or EZH2/PRC2, include but is not limited to diffuse large B cell lymphoma (DLBCL) , follicular lymphoma, leukemia, multiple myeloma, gastric cancer, malignant rhabdoid tumor, hepatocellular carcinoma, prostate cancer, breast carcinoma, bile duct and gallbladder cancers, bladder carcinoma, neuroblastoma, glioma, glioblastoma and astrocytoma, cervical cancer, colon cancer, melanoma, endometrial cancer, esophageal cancer, head and neck cancer, lung cancer, nasopharyngeal carcinoma, ovarian cancer, pancreatic cancer, renal cell carcinoma, rectal cancer, thyroid cancers, parathyroid tumors, uterine tumors, rhabdomyosarcoma, Kaposi
• the present invention provides a pharmaceutical composition
• a pharmaceutical composition comprising a compound of the present invention, or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier.
• the composition comprises at least two pharmaceutically acceptable carriers, such as those described herein.
• the pharmaceutical composition can be formulated for particular routes of administration such as oral administration, parenteral administration (e.g. by injection, infusion, transdermal or topical administration) , and rectal administration. Topical administration may also pertain to inhalation or intranasal application.
• the pharmaceutical compositions of the present invention can be made up in a solid form (including, without limitation, capsules, tablets, pills, granules, powders or suppositories) , or in a liquid form (including, without limitation, solutions, suspensions or emulsions) . Tablets may be either film coated or enteric coated according to methods known in the art.
• the pharmaceutical compositions are tablets or gelatin capsules comprising the active ingredient together with one or more of:
• diluents e.g., lactose, dextrose, sucrose, mannitol, sorbitol, cellulose and/or glycine;
• lubricants e.g., silica, talcum, stearic acid, its magnesium or calcium salt and/or polyethyleneglycol; for tablets also
• lubricants e.g., silica, talcum, stearic acid, its magnesium or calcium salt and/or polyethyleneglycol
• binders e.g., magnesium aluminum silicate, starch paste, gelatin, tragacanth, methylcellulose, sodium carboxymethylcellulose and/or polyvinylpyrrolidone; if desired
• disintegrants e.g., starches, agar, alginic acid or its sodium salt, or effervescent mixtures
• the compounds of the present invention are combined with other therapeutic agents, such as other anti-cancer agents, anti-allergic agents, anti-nausea agents (or anti-emetics) , pain relievers, cytoprotective agents, immunomodulator and combinations thereof.
• other therapeutic agents such as other anti-cancer agents, anti-allergic agents, anti-nausea agents (or anti-emetics) , pain relievers, cytoprotective agents, immunomodulator and combinations thereof.
• the other therapeutic agent is an anti-cancer agent or chemotherapeutic agent.
• General chemotherapeutic agents considered for use in combination therapies include anastrozole bicalutamide bleomycin sulfate busulfan busulfan injection capecitabine N4-pentoxycarbonyl-5-deoxy-5-fluorocytidine, carboplatin carmustine chlorambucil cisplatin cladribine cyclophosphamide ( or ) , cytarabine, cytosine arabinoside cytarabine liposome injection dacarbazine dactinomycin (Actinomycin D, Cosmegan) , daunorubicin hydrochloride daunorubicin citrate liposome injection dexamethasone, docetaxel doxorubicin hydrochloride etoposide fludarabine phosphate 5-fluorouracil flutamide tezacitibine, Gemcitabine (difluor
• Anti-cancer agents of particular interest for combinations with the compounds of the invention include:
• Cyclin-Dependent Kinase (CDK) inhibitors (Chen, S. et al., Nat Cell Biol., 12 (11) : 1108-14 (2010) ; Zeng, X. et al., Cell Cycle, 10 (4) : 579-83 (2011) ) Aloisine A; Alvocidib (also known as flavopiridol or HMR-1275, 2- (2-chlorophenyl) -5, 7-dihydroxy-8- [ (3S, 4R) -3-hydroxy-1-methyl-4-piperidinyl] -4-chromenone, and described in US Patent No.
• CDK Cyclin-Dependent Kinase
• CHK Checkpoint Kinase (CHK) inhibitors: (Wu, Z. et al., Cell Death Differ., 18 (11) : 1771-9 (2011) ) 7-Hydroxystaurosporine (UCN-01) ; 6-Bromo-3- (1-methyl-1H-pyrazol-4-yl) -5- (3R) -3-piperidinyl-pyrazolo [1, 5-a] pyrimidin-7-amine (SCH900776, CAS 891494-63-6) ; 5- (3-Fluorophenyl) -3-ureidothiophene-2-carboxylic acid N- [ (S) -piperidin-3-yl] amide (AZD7762, CAS 860352-01-8) ; 4- [ ( (3S) -1-Azabicyclo [2.2.2] oct-3-yl) amino] -3- (1H-benzimidazol-2-yl) -6-chloroquinolin-2 (1H) -
• PKT Protein Kinase B
• AKT inhibitors (Rojanasakul, Y., Cell Cycle, 12 (2) : 202-3 (2013) ; Chen B. et al., Cell Cycle, 12 (1) : 112-21 (2013) ) 8- [4- (1-Aminocyclobutyl) phenyl] -9-phenyl-1, 2, 4-triazolo [3, 4-f] [1, 6] naphthyridin-3 (2H) -one (MK-2206, CAS 1032349-93-1) ; Perifosine (KRX0401) ; 4-Dodecyl-N-1, 3, 4-thiadiazol-2-yl-benzenesulfonamide (PHT-427, CAS 1191951-57-1) ; 4- [2- (4-Amino-1, 2, 5-oxadiazol-3-yl) -1-ethyl-7- [ (3S) -3-piperidinylmethoxy] -1H-imidazo [4, 5-
• Phosphoinositide 3-kinase (PI3K) inhibitors (Gonzalez, M. et al., Cancer Res., 71 (6) : 2360-2370 (2011) ) 4- [2- (1H-Indazol-4-yl) -6- [ [4- (methylsulfonyl) piperazin-1-yl] methyl] thieno [3, 2-d] pyrimidin-4-yl] morpholine (also known as GDC 0941 and described in PCT Publication Nos.
• BCL-2 inhibitors (Béguelin, W. et al., Cancer Cell, 23 (5) : 677-92 (2013) ) 4- [4- [ [2- (4-Chlorophenyl) -5, 5-dimethyl-1-cyclohexen-1-yl] methyl] -1-piperazinyl] -N- [ [4- [ [ (1 R) -3- (4-morpholinyl) -1- [ (phenylthio) methyl] propyl] amino] -3- [ (trifluoromethyl) sulfonyl] phenyl] sulfonyl] benzamide (also known as ABT-263 and described in PCT Publication No.
• Mitogen-activated protein kinase (MEK) inhibitors (Chang, C.J. et al., Cancer Cell, 19 (1) : 86-100 (2011) )
• XL-518 also known as GDC-0973, Cas No. 1029872-29-4, available from ACC Corp. )
• Selumetinib (5- [ (4-bromo-2-chlorophenyl) amino] -4-fluoro-N- (2-hydroxyethoxy) -1-methyl-1H-benzimidazole-6-carboxamide, also known as AZD6244 or ARRY 142886, described in PCT Publication No.
• Benimetinib (6- (4-bromo-2-fluorophenylamino) -7-fluoro-3-methyl-3H-benzoimidazole-5-carboxylic acid (2-hydroxyethyoxy) -amide, also known as MEK162, CAS 1073666-70-2, described in PCT Publication No. WO2003077914) ; 2- [ (2-Chloro-4-iodophenyl) amino] -N- (cyclopropylmethoxy) -3, 4-difluoro-benzamide (also known as CI-1040 or PD184352 and described in PCT Publication No.
• Aromatase inhibitors (Pathiraja, T. et al., Sci. Transl. Med., 6 (229) : 229 ra41 (2014) ) Exemestane Letrozole and Anastrozole
• Topoisomerase II inhibitors (Bai, J. et al., Cell Prolif., 47 (3) : 211-8 (2014) ) Etoposide (VP-16 and Etoposide phosphate, and ) ; Teniposide (VM-26, ) ; and Tafluposide.
• SRC inhibitors (Hebbard, L., Oncogene, 30 (3) : 301-12 (2011) ) Dasatinib Saracatinib (AZD0530, CAS 379231-04-6) ; Bosutinib (SKI-606, CAS 380843-75-4) ; 5- [4- [2- (4-Morpholinyl) ethoxy] phenyl] -N- (phenylmethyl) -2-pyridineacetamide (KX2-391, CAS 897016-82-9) ; and 4- (2-Chloro-5-methoxyanilino) -6-methoxy-7- (1-methylpiperidin-4-ylmethoxy) quinazoline (AZM475271, CAS 476159-98-5) .
• Histone deacetylase (HDAC) inhibitors (Yamaguchi, J. et al., Cancer Sci., 101 (2) : 355-62 (2010) ) Voninostat Romidepsin Treichostatin A (TSA) ; Oxamflatin; Vorinostat ( Suberoylanilide hydroxamic acid) ; Pyroxamide (syberoyl-3-aminopyridineamide hydroxamic acid) ; Trapoxin A (RF-1023A) ; Trapoxin B (RF-10238) ; Cyclo [ ( ⁇ S, 2S) - ⁇ -amino- ⁇ -oxo-2-oxiraneoctanoyl-O-methyl-D-tyrosyl-L-isoleucyl-L-prolyl] (Cyl-1) ; Cyclo [ ( ⁇ S, 2S) - ⁇ -amino- ⁇ -oxo-2-oxiraneoctanoyl-O-methyl-D-tyros
• Anti-tumor antibiotics (Bai, J. et al., Cell Prolif., 47 (3) : 211-8 (2014) ) Doxorubicin ( and ) ; Bleomycin Daunorubicin (dauorubicin hydrochloride, daunomycin, and rubidomycin hydrochloride, ) ; Daunorubicin liposomal (daunorubicin citrate liposome, ) ; Mitoxantrone (DHAD, ) ; Epirubicin (Ellence TM ) ; Idarubicin ( Idamycin ) ; Mitomycin C Geldanamycin; Herbimycin; Ravidomycin; and Desacetylravidomycin.
• Immunomodulators of particular interest for combinations with the compounds of the invention include one or more of: an activator of a costimulatory molecule or an inhibitor of an immune checkpoint molecule (e.g., one or more inhibitors of PD-1, PD-L1, LAG-3, TIM-3 or CTLA4) or any combination thereof.
• an activator of a costimulatory molecule or an inhibitor of an immune checkpoint molecule (e.g., one or more inhibitors of PD-1, PD-L1, LAG-3, TIM-3 or CTLA4) or any combination thereof.
• the immunomodulator is an activator of a costimulatory molecule.
• the agonist of the costimulatory molecule is chosen from an agonist (e.g., an agonistic antibody or antigen-binding fragment thereof, or a soluble fusion) of OX40, CD2, CD27, CDS, ICAM-1, LFA-1 (CD11a/CD18) , ICOS (CD278) , 4-1 BB (CD137) , GITR, CD30, CD40, BAFFR, HVEM, CD7, LIGHT, NKG2C, SLAMF7, NKp80, CD160, B7-H3 or CD83 ligand.
• the immunomodulator is an inhibitor of an immune checkpoint molecule.
• the immunomodulator is an inhibitor of PD-1, PD-L1, PD-L2, CTLA4, TIM3, LAG3, VISTA, BTLA, TIGIT, LAIR1, CD160, 2B4 and/or TGFR beta.
• the inhibitor of an immune checkpoint molecule inhibits PD-1, PD-L1, LAG-3, TIM-3 or CTLA4, or any combination thereof.
• the term “inhibition” or “inhibitor” includes a reduction in a certain parameter, e.g., an activity, of a given molecule, e.g., an immune checkpoint inhibitor. For example, inhibition of an activity, e.g., a PD-1 or PD-L1 activity, of at least 5%, 10%, 20%, 30%, 40%or more is included by this term. Thus, inhibition need not be 100%.
• the present invention provides pharmaceutical compositions comprising at least one compound of the present invention (e.g., a compound of Formula (I) or a sub- formulae theref) or a pharmaceutically acceptable salt thereof, together with a pharmaceutically acceptable carrier suitable for administration to a human or animal subject, either alone or together with other anti-cancer agents.
• a pharmaceutically acceptable carrier suitable for administration to a human or animal subject, either alone or together with other anti-cancer agents.
• compositions will either be formulated together as a combination therapeutic, or as separate compositions.
• the compound of the invention and the other therapeutic agent may be manufactured and/or formulated by the same or different manufacturers.
• the structure of therapeutic agents identified by code numbers, generic or trade names may be taken from the actual edition of the standard compendium “The Merck Index” or from databases, e.g. Patents International (e.g. IMS World Publications) .
• the other therapeutic agents, which can be used in combination with a compound of the present invention can be prepared and administered as described in the art, such as in the documents cited above.
• the pharmaceutical composition may comprise a pharmaceutically acceptable carrier, as described above.
• the pharmaceutical composition or combination of the present invention may, for example, be in unit dosage of about 0.5 mg to 1000 mg of active ingredient (s) for a subject of about 50-70 kg.
• the present invention provides methods of treating human or animal subjects suffering from a cellular proliferative disease, such as cancer, comprising administering to the subject a therapeutically effective amount of a compound of the present invention or a pharmaceutically acceptable salt thereof, either alone or in combination with other anti-cancer agents.
• a cellular proliferative disease such as cancer
• the compound of the present invention and other anti-cancer agent (s) may be administered either simultaneously, concurrently or sequentially with no specific time limits, wherein such administration provides therapeutically effective levels of the two compounds in the body of the patient.
• the compound of the invention and the other therapeutic may be brought together into a combination therapy: (i) prior to release of the combination product to physicians (e.g.
• kits comprising the compound of the invention and the other therapeutic agent
• the physician themselves or under the guidance of the physician
• shortly before administration or in the patient themselves, e.g. during sequential administration of the compound of the invention and the other therapeutic agent.
• the compound of the present invention and the other anti-cancer agent (s) is generally administered sequentially in any order by infusion or orally.
• the dosing regimen may vary depending upon the stage of the disease, physical fitness of the patient, safety profiles of the individual drugs, and tolerance of the individual drugs, as well as other criteria well-known to the attending physician and medical practitioner (s) administering the combination.
• the compound of the present invention and other anti-cancer agent (s) may be administered within minutes of each other, hours, days, or even weeks apart depending upon the particular cycle being used for treatment.
• the cycle could include administration of one drug more often than the other during the treatment cycle and at different doses per administration of the drug.
• compounds of the present invention may be combined with other anti-cancer agents, anti-allergic agents, anti-nausea agents (or anti-emetics) , pain relievers, cytoprotective agents, and combinations thereof.
• anti-allergic agents may be administered to minimize the risk -of an allergic reaction.
• Suitable anti-allergic agents include corticosteroids, such as dexamethasone (e.g., ) , beclomethasone (e.g., ) , hydrocortisone (also known as cortisone, hydrocortisone sodium succinate, hydrocortisone sodium phosphate; e.g., hydrocortisone phosphate, HYDROCORT and ) , prednisolone (e.g., and ) , prednisone (e.g., LIQUID and ) , methylprednisolone (also known as 6-methylprednisolone, methylprednisolone acetate, methylprednisolone sodium succinate; e.g., and SOLU- ) ;
• corticosteroids such as dexamethasone (e.g., ) , beclomethasone (e
• anti-emetics may be administered in preventing nausea (upper stomach) and vomiting.
• Suitable anti-emetics include aprepitant ondansetron granisetron HCl lorazepam ( dexamethasone prochlorperazine casopitant ( and ) , and combinations thereof.
• medication to alleviate the pain experienced during the treatment period is prescribed to make the patient more comfortable.
• analgesics such are often used.
• Opioid analgesic drugs such as hydrocodone/paracetamol or hydrocodone/acetaminophen (e.g., ) , morphine (e.g., or ) , oxycodone (e.g., or ) , oxymorphone hydrochloride and fentanyl (e.g., ) are also useful for moderate or severe pain.
• cytoprotective agents such as neuroprotectants, free-radical scavengers, cardioprotectors, anthracycline extravasation neutralizers, nutrients and the like
• Suitable cytoprotective agents include amifostine glutamine, dimesna mesna dexrazoxane ( or ) , xaliproden and leucovorin (also known as calcium leucovorin, citrovorum factor and folinic acid) .
• a compound of the present invention may be used in combination with known therapeutic processes, for example, with the administration of hormones or in radiation therapy.
• a compound of the present invention may be used as a radiosensitizer, especially for the treatment of tumors which exhibit poor sensitivity to radiotherapy.
• kits comprising one or more compounds of the present invention and another therapeutic agent as described above.
• Representative kits include (a) compound of Formula (I) or sub-formulae thereof or a pharmaceutically acceptable salt thereof; and (b) at least one other therapeutic agent e.g., as indicated above; whereby such kit may further comprise a package insert or other labeling including directions for administration.
• the kits of the invention may be used for administering different dosage forms, for example, oral and parenteral; for administering two or more separate pharmaceutical compositions at different dosage intervals; or for titrating the separate compositions against one another; wherein at least one pharmaceutical composition comprises a compound a Formula (I) or sub-formulae thereof.
• the compounds of the invention can be prepared using the methods described below, or by variations thereon as appreciated by one skilled in the art of organic synthesis.
• Compounds of Formula (I) that possess a chiral center can be made substantially optically pure by using substantially optically pure starting material or by separation chromatography, recrystallization or other separation techniques well-known in the art.
• Schemes 1-8 describe potential routes for producing the compounds of the invention, which include compounds of Formula (I-3) :
• Compounds of Formula (I) that possess a chiral center can be made substantially optically pure by either using substantially optically pure starting material or by separation chromatography, recrystallization or other separation techniques well-known in the art. For a more detailed description, see the Example section below.
• the nitro intermediate 14 (prepared as in scheme 1, where R’ is methyl and R 2 is NO 2 ) was reacted with POCl 3 to give the chloro-azaquinoline 17, which upon treatment with NH 2 CH 3 furnished displacement product 20.
• Reverse phase preparative HPLC was carried out using C18 columns with UV 214 nm and 254 nm detection or prep LC-eluting with gradients of Solvent A (water with 0.1%TFA) and Solvent B (acetonitrile with 0.1%TFA) , or with gradients of Solvent A (water with 0.05% TFA) and Solvent B (acetonitrile with 0.05%TFA) , or with gradients of Solvent A (water with 0.05%ammonia) and Solvent B (acetonitrile with 0.05%ammonia) .
• the compounds of the present invention can be produced by organic synthesis methods known to one of ordinary skill in the art as shown in the following examples.
• conventional protecting groups are used to protect reactive functional groups in accordance with standard practice, for example, see T.W. Greene and P.G.M. Wuts in “Protecting Groups in Organic Synthesis” , John Wiley and Sons, 1991.
• Step 4 (E) -6-chloro-N- ( (dimethylamino) methylene) -3-methylpicolinamide (1-4)
• Step 6 2-chloro-8-methoxy-1, 7-naphthyridine (1-6)
• Step 7 tert-butyl ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) carbamate (1-7)
• Step 8 N- ( (1, 4-trans) -4- (aminomethyl) cyclohexyl) -8-methoxy-1, 7-naphthyridin-2-amine (1-8)
• Step 9 8-methoxy-N- ( (1, 4-trans) -4- ( ( (5-nitropyrimidin-2-yl) amino) methyl) cyclohexyl) -1, 7-naphthyridin-2-amine (1-9)
• Step 10 N 2 - ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) pyrimidine-2, 5-diamine (1)
• Step 1 tert-butyl 3- ( (2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) carbamoyl) azetidine-1-carboxylate (2-1)
• Step 2 N- (2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) azetidine-3-carboxamide (C2)
• Step 1 Ethyl 2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidine-5-carboxylate (8-1)
• Step 2 2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidine-5-carboxylic acid (8-2)
• Step 3 (2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) (piperazin-1-yl) methanone (C8)
• Step 1 N- ( (E) - (dimethylamino) methylene) -2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidine-5-carboxamide (12-1)
• Step 2 N- ( (1, 4-trans) -4- ( ( (5- (1H-1, 2, 4-triazol-5-yl) pyrimidin-2-yl) amino) methyl) cyclohexyl) -8-methoxy-1, 7-naphthyridin-2-amine (C12)
• Step 1 N- ( (1, 4-trans) -4- ( ( (5-iodopyrimidin-2-yl) amino) methyl) cyclohexyl) -8-methoxy-1, 7-naphthyridin-2-amine (13-1)
• Step 2 tert-butyl 2- (2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) acetate (13-2)
• Step 3 2- (2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) acetic acid (13-3)
• Step 4 2- (2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) acetamide (C13)
• Step 1 8-chloro-N- ( (1, 4-trans) -4- ( ( (5-nitropyrimidin-2-yl) amino) methyl) cyclohexyl) -1, 7-naphthyridin-2-amine (14-1)
• Step 2 N 2 - ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) pyrimidine-2, 5-diamine (C14)
• the title compound was prepared using a procedure similar to that in Step 1 of Example 2, with (C1) being replaced with (C14) and 1- (tert-butoxycarbonyl) azetidine-3-carboxylic acid being replaced with 2-hydroxyacetic acid.
• Step 1 4- ( (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) amino) -4-oxobutanoic acid (20-1)
• Step 2 N- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -4-morpholino-4-oxobutanamide (C20)
• the title compound was prepared by using a procedure similar to that in Step 4 of Example 13, with (13-3) being replaced with (20-1) and oxetan-3-amine being replaced with morpholine.
• Step 1 2- ( ( (1, 4-trans) -4- (aminomethyl) cyclohexyl) amino) -1, 7-naphthyridin-8-ol (21-1)
• Step 2 2- ( ( ( (1, 4-trans) -4- ( (8-hydroxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidine-5-carbonitrile (21-2)
• the title compound was prepared by using a procedure similar to that in Step 9 of Example 1, with (1-8) being replaced with (21-1) and 2-chloro-5-nitropyrimidine being replaced with 2-chloropyrimidine-5-carbonitrile.
• the product was purified by column chromatography (petroleum ether/EtOAc from 1/1 to 0/100, then CH 2 Cl 2 /CH 3 OH 20/1) to give 2- ( ( ( (1, 4-trans) -4- ( (8-hydroxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidine-5-carbonitrile (21-2) .
• Step 3 2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidine-5-carbonitrile (C21)
• Step 1 2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidine-5-carbonyl chloride (22-1)
• Step 2 (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) (morpholino) methanone (C22)
• Step 1 N- ( (1, 4-trans) -4- (aminomethyl) cyclohexyl) -8-chloro-1, 7-naphthyridin-2-amine (26-1)
• Step 2 Ethyl 2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidine-5-carboxylate (26-2)
• the title compound was prepared by using a procedure similar to that of in Step 1 of Example 8, and purified by column chromatography on silica gel (petroleum ether/EtOAc from 3/1 to 3/2) to give ethyl 2- ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidine-5-carboxylate (26-2) .
• Step 3 (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) methanol (26-3)
• Step 4 2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidine-5-carbaldehyde (26-4)
• Step 5 8-chloro-N- ( (1, 4-trans) -4- ( ( (5- ( (4- (methylsulfonyl) piperazin-1-yl) methyl) pyrimidin-2-yl) amino) methyl) cyclohexyl) -1, 7-naphthyridin-2-amine (C26)
• Step 2 8-chloro-N- ( (1, 4-trans) -4- ( ( (5- ( (oxetan-3-yloxy) methyl) pyrimidin-2-yl) amino) methyl) cyclohexyl) -1, 7-naphthyridin-2-amine (C35)
• Step 1 Ethyl 2- (2- ( ( ( (1, 4-trans) -4- ( (8-hydroxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) acetate (36-1)
• Step 2 Ethyl 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) acetate (36-2)
• Step 3 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) acetic acid (36-3)
• Step 4 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (oxetan-3-yl) acetamide (C36)
• Step 1 Isopropyl 2- (2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) acetate (46-1)
• Step 2 Isopropyl 2- (2- ( ( ( (1, 4-trans) -4- ( (8-hydroxy-1, 7-naphthyridin-2 yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) acetate (46-2)
• Step 3 Isopropyl 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) acetate (46-3)
• Step 4 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) ethan-1-ol (C46)
• Step 1 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) ethyl methanesulfonate (47-1)
• Step 2 8-chloro-N- ( (1, 4-trans) -4- ( ( (5- (2- ( (3-methyloxetan-3-yl) amino) ethyl) pyrimidin-2-yl) amino) methyl) cyclohexyl) -1, 7-naphthyridin-2-amine (C47)
• reaction mixture was diluted with CH 2 Cl 2 (100 mL) , and the organic phase was washed with saturated aqueous NaHCO 3 solution (100 mL) and brine (50 mL) , dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to 3- (oxetan-3-ylamino) propanenitrile (49-1) , which was used directly for next step.
• Step 2 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -N- (2-cyanoethyl) -N- (oxetan-3-yl) acetamide (C49)
• the title compound was prepared by using a procedure similar to that in Step 2 of Example 49 with 3- (oxetan-3-ylamino) propanenitrile (49-1) being replaced with 2- (oxetan-3-ylamino) ethan-1-ol.
• the title compound was prepared by using a procedure similar to that of Example 36, except (13-2) was replaced with which was prepared by using a procedure similar to that in Step 2 of Example 13, with tert-butyl 2-bromoacetate being replaced with tert-butyl 2-bromopropanoate.
• the title compound was prepared by using a procedure similar to that of Example 52, except in Step 4 of Example 36 oxetan-3-amine is replaced with N-methyloxetan-3-amine.
• Step 1 2- ( (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) methyl) isoindoline-1, 3-dione (58-1)
• Step 2 N- ( (1, 4-trans) -4- ( ( (5- (aminomethyl) pyrimidin-2-yl) amino) methyl) cyclohexyl) -8-chloro-1, 7-naphthyridin-2-amine (58-2)
• Step 3 N- ( (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) methyl) azetidine-2-carboxamide (C58)
• Step 1 N 8 -methyl-N 2 - ( (1, 4-trans) -4- ( ( (5-nitropyrimidin-2-yl) amino) methyl) cyclohexyl) -1, 7-naphthyridine-2, 8-diamine (62-1)
• the title compound was prepared by using a procedure similar to that of Example 60, except Compound (C21) was replaced with (14-1)
• the product was purified by column chromatography (petroleum ether/EtOAc from 1/1 to 0/1) to give N 8 -methyl-N 2 - ( (1, 4-trans) -4- ( ( (5-nitropyrimidin-2-yl) amino) methyl) cyclohexyl) -1, 7-naphthyridine-2, 8-diamine (62-1) .
• Step 2 N 2 - ( (1, 4-trans) -4- ( ( (5-aminopyrimidin-2-yl) amino) methyl) cyclohexyl) -N 8 -methyl-1, 7-naphthyridine-2, 8-diamine (C62)
• Step 1 N- ( (1, 4-trans) -4- ( ( (5-bromopyrimidin-2-yl) amino) methyl) cyclohexyl) -8-methoxy-1, 7-naphthyridin-2-amine (64-1)
• Step 2 3- (2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) oxazolidin-2-one (64-2)
• Step 3 3- (2- ( ( ( (1, 4-trans) -4- ( (8-hydroxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) oxazolidin-2-one (64-3)
• Step 4 3- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) oxazolidin-2-one (C64)
• Step 1 N 2 - ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) -N 5 -methylpyrimidine-2, 5-diamine (65-1)
• the title compound was prepared by using a procedure similar to that of Example 60, except Compound (C21) was replaced with (64-1) and the product was purified by column chromatography (petroleum ether/EtOAc from 1/1 to 0/100) to give N 2 - ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) -N 5 -methylpyrimidine-2, 5-diamine (65-1) .
• Step 2 Methyl (2- ( ( ( (1, 4-trans) -4- ( (8-methoxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) (methyl) carbamate (65-2)
• Step 3 Methyl (2- ( ( ( (1, 4-trans) -4- ( (8-hydroxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) (methyl) carbamate (65-3)
• Step 3 methyl (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) (methyl) carbamate (C65)
• the title compound was prepared by using a procedure similar to that of in Step 4 of Example 64, except (64-3) was replaced with (65-3) .
• Step 1 2-chloro-8- (difluoromethoxy) -1, 7-naphthyridine (66-1)
• Step 2 tert-butyl ( ( (1, 4-trans) -4- ( (8- (difluoromethoxy) -1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) carbamate (66-2)
• Step 3 N- ( (1, 4-trans) -4- (aminomethyl) cyclohexyl) -8- (difluoromethoxy) -1, 7-naphthyridin-2-amine (66-3)
• Step 4 8- (difluoromethoxy) -N- ( (1, 4-trans) -4- ( ( (5-nitropyrimidin-2-yl) amino) methyl) cyclohexyl) -1, 7-naphthyridin-2-amine (66-4)
• the title compound was prepared by using a procedure similar to that in Step 9 of Example 1, with (1-8) being replaced with (66-3) and the product was purified by column chromatography (petroleum ether/EtOAc from 3/1 to 1/1) to give 8- (difluoromethoxy) -N- ( (1, 4-trans) -4- ( ( (5-nitropyrimidin-2-yl) amino) methyl) cyclohexyl) -1, 7-naphthyridin-2-amine (66-4) .
• Step 4 N 2 - ( ( (1, 4-trans) -4- ( (8- (difluoromethoxy) -1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) pyrimidine-2, 5-diamine (C66)
• Step 1 Ethyl 2- ( (2- ( ( ( (1, 4-trans) -4- ( (8-hydroxy-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) oxy) propanoate (68-1)
• Step 2 Ethyl 2- ( (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) oxy) propanoate (68-2)
• Step 3 2- ( (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) oxy) propan-1-ol (C68)
• Example 73 and Example 74
• Step 1 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -2-oxoacetic acid (75-1)
• Step 2 Ethyl 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -2-oxoacetate (75-2)
• Step 3 Ethyl 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -2-hydroxyacetate (75-3)
• Step 4 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -2-hydroxy-N- (oxetan-3-yl) acetamide (75-4)
• Step 4 (S) -2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -2-hydroxy-N- (oxetan-3-yl) acetamide (C75) and (R) -2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) -amino) pyrimidin-5-yl) -2-hydroxy-N- (oxetan-3-yl) acetamide (C76)
• Step 2 Ethyl 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -2, 2-difluoroacetate (77-2)
• Step 3 2- (2- ( ( ( (1, 4-trans) -4- ( (8-chloro-1, 7-naphthyridin-2-yl) amino) cyclohexyl) methyl) amino) pyrimidin-5-yl) -2, 2-difluoro-N- (oxetan-3-yl) acetamide (C77)
• the compounds of the present invention may be evaluated for their ability to inhibit PRC2 using assays described below, as well as other assays known in the art.
• Representative compounds of the invention were serially and separately diluted 3-fold in DMSO to obtain twelve concentrations. Then the test compounds at each concentration (120 nL of each) were transferred by Mosquito into a 384-well Perkin Elmer ProxiPlate 384 plus plates. Solutions (6 ⁇ L) of 80 nM wild type PRC2 (wtPRC2) complex and 60 ⁇ M SAM in reaction buffer (20 mM Tris, pH 8.0, 0.1%BSA, 0.01%Triton, 0.5 mM DTT) were added to the wells that were then incubated with the test compound for 20 min.
• reaction buffer A 6 ⁇ L solution of 3 ⁇ M of the substrate peptide H3K27me1 (histone H3 [21-44] -K27me1-biotin) and 6 ⁇ M regulatory peptide H3K27me3 (histone H3 [21-44] -K27me3) in reaction buffer was added to initiate each reaction.
• the final components in the reaction solution include 40 nM wtPRC2 complex, 30 ⁇ M SAM, 1.5 ⁇ M H3K27me1 and 3 ⁇ M H3K27me3 peptides with varying concentration of the compounds.
• a positive control consisted of the enzyme at 40 nM, 30 ⁇ M SAM, 1.5 ⁇ M H3K27me1 and 3 ⁇ M H3K27me3 in the absence of the test compound, and a negative control consisted of 30 ⁇ M SAM, 1.5 ⁇ M H3K27me1 and 3 ⁇ M H3K27me3 only.
• Each reaction was incubated at room temperature for 120 min, then stopped by addition of 3 ⁇ L per of quench solution (2.5%TFA with 320 nM d4-SAH) .
• the reaction mixture was centrifuged (Eppendorf centrifuge 5810, Rotor A-4-62) for 2 min at 2000 rpm and read on an API 4000 triple quadrupole mass spec with Turbulon Spray (Applied Biosystem) coupled with Prominence UFLC (Shimadzu) .
• the levels of SAH production were normalized based on the values coming from the positive and negative controls to give percent enzyme activities.
• the data were fit to a dose response equation using the program Helios to get the IC 50 values of the test compound.
• Representative compounds of the invention were serially and separately diluted 3-fold in DO to obtain a total of eight or twelve concentrations. Then the compounds were added to G401 cell cultured in 384-well plate at 1: 500 dilution to obtain the highest concentration of 20 ⁇ M. The cells were further cultured for 48 h before ELISA procedure.
• Histone extraction Cells, in 384-well plate, were washed with PBS (10 x PBS buffer (80 g NaCl (Sigma, S3014) , 2 g KCl (Sigma, 60128) , 14.4 g Na 2 HPO 4 (Sigma, S5136) , 2.4 g KH 2 PO 4 (Sigma, P9791) to 1 L water, pH to 7.4) and lysed with the addition of lysis buffer (0.4N HCl; 45 ⁇ L per well) . The plate was gently agitated at 4°C for 30 min. The cell lysate was neutralized with neutralization buffer (0.5 M sodium phosphate dibasic, pH 12.5, 1 mM DTT; 36 ⁇ L per well) . The plate was agitated to ensure the lysates were well mixed prior to the ELISA protocol.
• PBS 10 x PBS buffer (80 g NaCl (Sigma, S3014) , 2 g KCl (Sigma, 60128) , 14.4
• ELISA protocol Cell lysates were transferred to the wells of a 384-well plate and the final volume was adjusted to 50 ⁇ L per well with PBS. The plate was sealed, centrifuged at 2,000 rpm for 2 min and incubated at 4°C for about 16 h. The plate was washed with TBST buffer (1 x TBS (10x TBS: 24.2 g Tris (Sigma, T6066) , 80 g NaCl (Sigma, S3014) to 1 L of water and adjust pH to 7.6 with HCl) with 0.1%Tween-20) . Blocking buffer (TBST, 5%BSA; 50 ⁇ L per well) was added and the plate was incubated for 1 h at rt.
• TBST buffer 5%BSA; 50 ⁇ L per well
• the blocking buffer was removed and primary antibody was added (30 ⁇ L per well) .
• the following dilutions were performed with blocking buffer: for anti-H3K27me3 antibody (Cell Signaling Technology, #9733) , dilution was 1: 1000; for anti-H3K27me2 antibody (Cell Signaling Technology, #9288) , dilution was 1: 100; for anti-H3 antibody (Abcam, Cat#24834) , dilution was 1: 1000.
• the primary antibody was incubated in the plate at rt for 1 h.
• the wells were washed with TBST and incubated with secondary antibody for 1 h at rt.
• B cell lymphoma cell KARPAS422 was cultured using standard cell culture conditions in RPMI-1640 (Invitrogen, cat #11875) supplemented with 15%FBS (Invitrogen, cat #10099-141) in humidified incubator at 37°C, 5%CO 2 .
• RPMI-1640 Invitrogen, cat #11875
• 15%FBS Invitrogen, cat #10099-141
• PRC2 inhibition was assessed by PRC2 inhibition on cell proliferation.
• exponentially growing cells were seeded at a density of 1 ⁇ 10 5 cells/mL in 12-well plate (Corning, cat #CLS3513) . After cell seeding, a compound of the invention was added to the cell media (in concentrations ranging from 0 to 100 ⁇ M, 3x dilution series) .
• Viable cell numbers were determined every 3–4 days for up to 14 days using Vi-CELL (Beckman Coulter) . On days of cell counting, fresh growth media and compound were replenished and cells split back to a density of 1 ⁇ 10 5 cells/mL. Total cell number is expressed as split-adjusted viable cells per mL. The dose response curves and IC 50 values were generated using Prism.
• Table 3 lists IC 50 values in the EZH2 (a) LC-Qualified and/or (b) ELISA Qualified assays measured for the following examples.
• Table 4 lists antiproliferative activities (IC 50 values) in B cell lymphoma cell KARPAS422 after 14 days of treatment for the following examples.

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