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  • C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
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  • 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
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  • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
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  • C07F7/081—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te
  • C07F7/0812—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te comprising a heterocyclic ring
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  • 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
  • A61K31/4985—Pyrazines or piperazines ortho- or peri-condensed with heterocyclic ring systems
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  • 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
  • A61K31/50—Pyridazines; Hydrogenated pyridazines
  • A61K31/5025—Pyridazines; Hydrogenated pyridazines ortho- or peri-condensed with heterocyclic ring systems
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  • 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
  • A61K31/519—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with heterocyclic rings
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  • A61P35/00—Antineoplastic agents
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  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
  • C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
  • C07D417/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond
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  • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
  • C07D417/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing three or more hetero rings
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  • C07D513/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
  • C07D513/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains two hetero rings
  • C07D513/04—Ortho-condensed systems
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  • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
  • C07F9/02—Phosphorus compounds
  • C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
  • C07F9/645—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having two nitrogen atoms as the only ring hetero atoms
  • C07F9/6503—Five-membered rings
  • C07F9/65031—Five-membered rings having the nitrogen atoms in the positions 1 and 2
  • C07F9/65038—Five-membered rings having the nitrogen atoms in the positions 1 and 2 condensed with carbocyclic rings or carbocyclic ring systems
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  • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
  • C07F9/02—Phosphorus compounds
  • C07F9/547—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
  • C07F9/6558—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom containing at least two different or differently substituted hetero rings neither condensed among themselves nor condensed with a common carbocyclic ring or ring system
  • C07F9/65583—Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom containing at least two different or differently substituted hetero rings neither condensed among themselves nor condensed with a common carbocyclic ring or ring system each of the hetero rings containing nitrogen as ring hetero atom
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  • C07B2200/05—Isotopically modified compounds, e.g. labelled

Definitions

• HPK1 hematopoietic progenitor kinase 1
• pharmaceutical compositions comprising the inhibitors, methods of using the inhibitors for the treatment of various disorders associated with HPK1, and methods of preparing these compounds.
• Immunotherapy is treatment that uses the human body’s own immune system to help fight cancer and other disorders.
• This relatively new approach has achieved remarkable clinical successes in the treatment of a variety of tumor types in recent years, especially with the treatment of immune checkpoint inhibitors and chimeric antigen T-cell therapy.
• the most investigated checkpoint inhibitors including CTLA4, PD-1, or PD-L1 inhibitors have demonstrated significant antitumor activity by overcoming immunosuppressive mechanisms at the tumor site.
• Hematopoietic progenitor kinase 1 is a serine/threonine kinase and a member of MAP4K. HPK1 is prominently expressed in subsets of hematopoietic cell lineages. HPK1 is a newly identified as a critical negative regulator in the activation of T lymphocytes and dendritic cells. It has been recently demonstrated that the important roles for kinase activity of HPK1 in anti -cancer immunity as a new intracellular checkpoint molecule as well as potential advantages of combination therapy with current checkpoint regimens. HPK1 inhibition is expected to have dual functions, 1. prolonged activation of T cells; 2. enhanced APC functions by dendritic cells.
• HPK1 has been validated as a novel target for anticancer immunotherapy.
• cancers that are treatable using the compounds of the present disclosure include, but are not limited to, all forms of carcinomas, melanomas, blastomas, sarcomas, lymphomas and leukemias, including without limitation, bladder carcinoma, brain tumors, breast cancer, cervical cancer, colorectal cancer, esophageal cancer, endometrial cancer, hepatocellular carcinoma, laryngeal cancer, lung cancer, osteosarcoma, ovarian cancer, pancreatic cancer, prostate cancer, renal carcinoma and thyroid cancer, acute lymphocytic leukemia, acute myeloid leukemia, ependymoma, Ewing’s sarcoma, glioblastoma, medulloblastoma, neuroblastoma, osteosarcoma, rhabdomyosarcoma, r
• the present disclosure provides novel indazole compounds and pharmaceutically acceptable salts as effective HPK1 inhibitors and dual activators of T cell and dendritic cell.
• One embodiment of the invention is a compound represented by Formula (I): Formula (I) or a pharmaceutically acceptable salt, hydrate, solvate thereof, wherein R 1 , R 2 , R 3 , R 4 , R 5 , Het, M, and L are as defined in the detailed descriptions.
• a pharmaceutical composition comprising a pharmaceutically acceptable carrier or diluent and a compound of Formula (I) or a pharmaceutically acceptable salt thereof.
• a method of treating a subject with a disease or disorder associated with modulation of HPK1 comprising: administering to the subject a therapeutically effective amount of a compound of Formula (I) or a pharmaceutically acceptable salt thereof.
• alkoxy is RO — where R is alkyl.
• alkoxy groups include methoxy, ethoxy and propoxy.
• alkoxyalkyl refers to an alkyl moiety substituted with an alkoxy group.
• alkoxyalkyl groups include methoxymethyl, methoxyethyl, methoxypropyl and ethoxy ethyl.
• alkoxycarbonyl is ROC(O) — , where R is an alkyl group as defined herein. In various embodiments, R is a C1-C10 alkyl group or a Ci-Ce alkyl group.
• alkyl refers to a straight or branched chain hydrocarbonyl group. In an embodiment, alkyl has from 1 to 12 carbon atoms. In some embodiments, alkyl is a C1-C10 alkyl group or a Ci-Ce alkyl group. Examples of alkyl groups include, but are not limited to, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, pentyl, hexyl, heptyl, octyl, nonyl and decyl, "lower alkyl” means alkyl having from 1 to 4 carbon atoms.
• Ci-Ce alkyl means an alkyl which carbon number is any integer of from 1 to 6.
• alkylamino refers to an amino group substituted with one or more alkyl groups.
• N-(alkyl)amino is RNH — and “N,N-(alkyl)2amino” is R2N — , where the R groups are alkyl as defined herein and are the same or different.
• R is a C1-C10 alkyl group or a Ci-Ce alkyl group.
• alkylamino groups include methylamino, ethylamino, propylamino, butylamino, dimethylamino, diethylamino, and methylethylamno.
• alkylaminoalkyl refers to an alkyl moiety substituted with an alkylamino group, wherein alkylamino is as defined herein.
• alkylaminoakyl groups include methylaminomethyl and ethylaminomethyl.
• alkynyl refers to a straight or branched carbon-chain group with at least one site of unsaturation, i.e., a carbon-carbon, sp triple bond. In an embodiment, alkynyl has from 2 to 12 carbon atoms. In some embodiments, alkynyl is a C2-C10 alkynyl group or a C2-C6 alkynyl group. Examples of alkynyl groups include acetylenic ( — C ⁇ CH) and propargyl ( — C FEC ⁇ CH).
• aryl refers to any monocyclic or bicyclic carbon ring of up to 7 atoms in each ring, wherein at least one ring is aromatic, or an aromatic ring system of 5 to 14 carbon atoms which includes a carbocyclic aromatic group fused with a 5 -or 6-membered cycloalkyl group.
• Representative examples of aryl groups include, but are not limited to, phenyl, tolyl, xylyl, naphthyl, tetrahydronaphthyl, anthracenyl, fluorenyl, indenyl, azulenyl and indanyl.
• a carbocyclic aromatic group can be unsubstituted or optionally substituted.
• cycloalkyl is a hydrocarbyl group containing at least one saturated or partially unsaturated ring structure, and attached via a ring carbon. In various embodiments, it refers to a saturated or a partially unsaturated C3-C12 cyclic moiety, examples of which include cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cycloheptyl and cyclooctyl.
• Cycloalkyloxy is RO — , where R is cycloalkyl.
• halogen and “halo” refers to chloro ( — Cl), bromo ( — Br), fluoro ( — F) or iodo ( — I).
• Haloalkoxy refers to an alkoxy group substituted with one or more halo groups and examples of haloalkoxy groups include, but are not limited to, — OCF3, — OCHF2 and — OCH2F.
• Haloalkoxyalkyl refers to an alkyl moiety substituted with a haloalkoxy group, wherein haloalkoxy is as defined herein.
• haloalkoxyalkyl groups include trifluoromethoxymethyl, trifluoroethoxymethyl and trifluoromethoxy ethyl.
• Haloalkyl refers to an alkyl moiety substituted with one or more halo groups. Examples of haloalkyl groups include — CF3 and — CHF2.
• heteroalkyl refers to a straight- or branched-chain alkyl group having from 2 to 14 carbons (in some embodiments, 2 to 10 carbons) in the chain, one or more of which has been replaced by a heteroatom selected from S, O, P and N.
• exemplary heteroalkyls include alkyl ethers, secondary and tertiary alkyl amines, amides, alkyl sulfides, and the like.
• heterocyclyl includes the heteroaryls defined below and refers to a saturated or partially unsaturated monocyclic, bicyclic or tricyclic group of 2 to 14 ring -carbon atoms and, in addition to ring -carbon atoms, 1 to 4 heteroatoms selected from P, N, O and S.
• the heterocyclic group is attached to another moiety through carbon or through a heteroatom, and is optionally substituted on carbon or a heteroatom.
• heterocyclyl examples include azetidinyl, benzoimidazolyl, benzofuranyl, benzofurazanyl, benzopyrazolyl, benzotriazolyl, benzothiophenyl, benzoxazolyl, carbazolyl, carbolinyl, cinnolinyl, furanyl, imidazolyl, indolinyl, indolyl, indolazinyl, indazolyl, isobenzofuranyl, isoindolyl, isoquinolyl, isothiazolyl, isoxazolyl, naphthpyridinyl, oxadiazolyl, oxazolyl, oxazoline, isoxazoline, oxetanyl, pyranyl, pyrazinyl, pyrazolyl, pyridazinyl, pyridopyridinyl, pyridazinyl, pyridyl,
• Heterocyclyloxy is RO — , where R is heterocyclyl.
• Heterocyclylthio is RS — , where R is heterocyclyl.
• the term “3- or 4-membered heterocyclyl” refers to a monocyclic ring having 3 or 4 ring atoms wherein at least one ring atom is heteroatom selected from the group consisting of N, O and S.
• Non-limiting examples of 3- or 4-membered heterocyclyl include aziridinyl, 2H-azirinyl, oxiranyl, thiiranyl, azetidinyl, 2,3-dihyroazetyl, azetyl, 1,3-diazetidinyl, oxetanyl, 2H-oxetyl, thietanyl, and 2H-thietyl.
• heteroaryl refers to a monocyclic, bicyclic or tricyclic ring having up to 7 atoms in each ring, wherein at least one ring is aromatic and contains from 1 to 4 heteroatoms in the ring selected from the group consisting of N, O and S.
• heteroaryl examples include pyridyl, thienyl, furanyl, pyrimidyl, imidazolyl, pyranyl, pyrazolyl, thiazolyl, thiadiazolyl, isothiazolyl, oxazolyl, isoxazoyl, pyrrolyl, pyridazinyl, pyrazinyl, quinolinyl, isoquinolinyl, benzofuranyl, dibenzofuranyl, dibenzothiophenyl, benzothienyl, indolyl, benzothiazolyl, benzooxazolyl, benzimidazolyl, isoindolyl, benzotriazolyl, purinyl, thianaphthenyl and pyrazinyl.
• heteroaryl can occur via an aromatic ring, or, if heteroaryl is bicyclic or tricyclic and one of the rings is not aromatic or contains no heteroatoms, through a non-aromatic ring or a ring containing no heteroatoms.
• Heteroaryl is also understood to include the N-oxide derivative of any nitrogen containing heteroaryl.
• Heteroaryloxy is RO — , where R is heteroaryl.
• hydroxyalkoxy refers to an alkoxy group substituted with a hydroxyl group ( — OH), wherein alkoxy is as defined herein.
• alkoxy is as defined herein.
• An example of hydroxyalkoxy is hydroxyethoxy.
• hydroxyalkyl refers to a linear or branched monovalent Ci- C io hydrocarbon group substituted with at least one hydroxy group and examples of hydroxyalkyl groups include, but are not limited to, hydroxymethyl, hydroxyethyl, hydroxypropyl and hydroxybutyl.
• the term “pharmaceutically acceptable” means suitable for use in pharmaceutical preparations, generally considered as safe for such use, officially approved by a regulatory agency of a national or state government for such use, or being listed in the U.S. Pharmacopoeia or other generally recognized pharmacopoeia for use in animals, and more particularly in humans.
• the term “pharmaceutically acceptable carrier” refers to a diluent, adjuvant, excipient, or carrier, or other ingredient which is pharmaceutically acceptable and with which a compound of the invention is administered.
• the term “pharmaceutically acceptable salt” refers to a salt which may enhance desired pharmacological activity.
• pharmaceutically acceptable salts include acid addition salts formed with inorganic or organic acids, metal salts and amine salts.
• acid addition salts formed with inorganic acids include salts with hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid and phosphoric acid.
• Examples of acid addition salts formed with organic acids such as acetic acid, propionic acid, hexanoic acid, heptanoic acid, cyclopentanepropionic acid, glycolic acid, pyruvic acid, lactic acid, malonic acid, succinic acid, malic acid, maleic acid, fumaric acid, tartaric acid, citric acid, benzoic acid, o-(4-hydroxy-benzoyl)-benzoic acid, cinnamic acid, mandelic acid, methane sulfonic acid, ethane sulfonic acid, 1,2-ethanedisulfonic acid, 2-hydroxyethane-sulfonic acid, benzenesulfonic acid, p- chlorobenzene sulfonic acid, 2-naphthalenesulfonic acid, p-toluenesulfonic acid, camphorsulfonic acid, 4- methyl-bicyclo[2.2.2]oct-2-enel
• substituted means any of above groups (i.e., alkyl, aryl, heteroaryl, heterocycle or cycloalkyl) wherein at least one hydrogen atom of the moiety being substituted is replaced with a substituent.
• each carbon atom of the group being substituted is substituted with no more than two substituents.
• each carbon atom of the group being substituted is substituted with no more than one substituent.
• two hydrogen atoms are replaced with an oxygen which is attached to the carbon via a double bond.
• the term “therapeutically effective amount” means when applied to a compound of the invention is intended to denote an amount of the compound that is sufficient to ameliorate, palliate, stabilize, reverse, slow or delay the progression of a disorder or disease state, or of a symptom of the disorder or disease.
• the method of the present invention provides for administration of combinations of compounds.
• the “therapeutically effective amount” is the amount of a compound of the present invention in the combination sufficient to cause the intended biological effect.
• treatment means ameliorating or reversing the progress or severity of a disease or disorder, or ameliorating or reversing one or more symptoms or side effects of such disease or disorder.
• Treatment or “treating”, as used herein, also means to inhibit or block, as in retard, arrest, restrain, impede or obstruct, the progress of a system, condition or state of a disease or disorder.
• treatment or “treating” further means an approach for obtaining beneficial or desired clinical results, where “beneficial or desired clinical results” include, without limitation, alleviation of a symptom, diminishment of the extent of a disorder or disease, stabilized (i.e., not worsening) disease or disorder state, delay or slowing of a disease or disorder state, amelioration or palliation of a disease or disorder state, and remission of a disease or disorder, whether partial or total.
• the present disclosure provides a compound of Formula (I): or a pharmaceutically acceptable salt, hydrate, or solvate, thereof, wherein:
• X is O or S
• L is a bond, -O-, -S-, or -NR 6 -;
• R 1 is alkyl, cycloalkyl, aryl, heteroaryl, or heterocyclyl, wherein R 1 is optionally substituted with one or more substituents independently selected from R 7 ;
• R 6 is -H or Ci-6 alkyl
• R 9 is -H, Ci-6 alkyl, Ci-6 haloalkyl, C 2 -6 alkenyl, C 2 -6 alkynyl, cycloalkyl, aryl, heteroaryl, or heterocyclyl;
• Het is selected from the group consisting of:
• R a , R b and R c is independently -H, -D, halo, CF3, CF2H, CH2F, CN, OR 9 or NR 10 R n ;
• M is a bond, -O-, -S-, or -NR 6 -;
• R 6 is -H or C1-6 alkyl
• R 5 is -H, -D, -CD3, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, cycloalkyl, halo, hydroxyl, -CH2OH, -CD2OH, - CN or haloalkyl.
• L is a bond
• R 1 is cycloalkyl which is optionally substituted with one or more groups selected from the group consisting of C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, cycloalkyl, halo, cyano, hydroxy, -C(O)R 9 , -C(O)OR 9 , -C(O)NR 10 R n , -OR 9 , -OC(O)R 9 , -OC(O)NR 10 R n , -NR 10 R n , -N(R 6 )NR 10 R n , -N(R 6 )OR 9 , -N(R 6 )C(O)R 9 , -N(R 6 )C(O)OR 9 , and -N(R 6 )C(O)NR 10 R n
• each of R 2 and R 3 is independently -H, halo, al
• R 1 , R 2 , R 3 , R 4 , R 5 , R a , R b , M, and L are as defined above for Formula (I).
• L is a bond
• R 1 is cyclopropyl which is optionally substituted with one or more groups selected from the group consisting of halo, C1-3 alkylthio, C1-3 alkyl, C1-3 hydroxyalkyl and C1-3 haloalkyl
• R 2 is -H, alkyl, halo, haloalkyl, or alkylthio
• R 3 is -H, alkyl, or halo
• M is a bond, -O-, -S- or -NR 6 -
• R 4 is -H, halo, alkyl, hydroxyalkyl, haloalkyl, haloalkenyl, cycloalkyl, cyanoalkyl, dimethylamino, dimethylaminoethyl, dimethylaminocarbonyl, methylaminooxoethyl, aminocarbonylalkyl, acetamindoethyl, propiona
• Non-limiting examplery compounds of Formula (II) include the compound of Examples 1-145 of Table 1.
• the compound is selected from the group consisting of: the compounds of Examples 58, 80, 82, 85, 87, 92, 94, 97, 98, 110, 111, 118, 123, 125, 129, and 134.
• R 1 , R 2 , R 3 , R 4 , R 5 , R a , R b , M, and L are as defined above for Formula (I).
• L is a bond
• R 1 is cyclopropyl which is optionally substituted with one or more groups selected from the group consisting of halo, C1-3 alkyl, C1-3 hydroxyalkyl and C1-3 haloalkyl
• R 2 is -H, alkyl, halo, haloalkyl, or alkylthio
• R 3 is -H, alkyl, or halo
• M is a bond, -O-, -S- or - NR 6 -
• R 4 is -H, halo, alkyl, hydroxyalkyl, dimethylamino, dimethylaminoethyl, dimethylaminocarbonyl, methylaminooxoethyl, aminocarbonylalkyl, acetamindoethyl, or alkoxyalkyl
• R 5 is -H, alkyl, or halo.
• Non-limiting examplery comounds of Formula (III) include the compound of Examples 146-218 of Table 1.
• the compound is selected from the group consisting of the compounds of Examples 149, 152, 156, 159, 161-163, 167, 169, 170, 172-175, 178, 184, 193, 194, 196, 199, and 218.
• R 1 , R 2 , R 3 , R 4 , R 5 , R a , R b , M, and L are as defined above for Formula (I).
• L is a bond
• R 1 is cyclopropyl which is optionally substituted with one or more groups selected from the group consisting of halo, C1-3 alkyl, C1-3 hydroxyalkyl and C1-3 haloalkyl
• R 2 is -H, alkyl, halo, haloalkyl, or alkylthio
• R 3 is -H, alkyl, or halo
• M is a bond, -O-, -S- or - NR 6 -
• R 4 is -H, halo, alkyl, hydroxyalkyl, haloalkyl, haloalkenyl, cycloalkyl, cyanoalkyl, dimethylamino, dimethylaminoethyl, dimethylaminocarbonyl, methylaminooxoethyl, aminocarbonylalkyl, acetamindoethyl, propionamidoethyl,
• Non-limiting examplery compounds of Formula (IV) include the compound of Examples 219 and 220 of Table 1.
• R 1 , R 2 , R 3 , R 4 , R 5 , R a , R b , M, and L are as defined above for Formula (I).
• L is a bond
• R 1 is cycloalkyl which is optionally substituted with one or more groups selected from the group consisting of C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, cycloalkyl, halo, cyano, hydroxy, -C(O)R 9 , -C(O)OR 9 , -C(O)NR 10 R n , -OR 9 , -OC(O)R 9 , -OC(O)NR 10 R n , -NR 10 R n , -N(R 6 )NR 10 R 11 , -N(R 6 )OR 9 , -N(R 6 )C(O)R 9 , -N(R 6 )C(O)OR 9 , and -N(R 6 )C(O)NR 10 R n
• R 1 is cycloalkyl which is optionally substituted with one or
• Non-limiting examplery compounds of Formula (V) include the compound of Examples 221-445 of Table 1.
• R 1 is cyclopropyl which is optionally substituted with one or more groups selected from the group consisting of halo, C1-C3 alkyl, C1-C3 hydroxyalkyl and C1-C3 haloalkyl;
• R 2 is -H, alkyl, alkylthio, haloalkyl, or halo;
• R 3 is -H, alkyl, or halo;
• M is a bond, -O-, or -NR 6 -;
• R 4 is -H, halo, alkyl, monoalkylamino, or dialkylamino;
• R 5 is -H, alkyl, or halo.
• Non-limiting examplery compounds include one selected from the group consisting of:
• R 1 is cyclopropyl which is optionally substituted with one or more groups selected from the group consisting of halo, C1-3 alkyl, C1-3 hydroxyalkyl and C1-3 haloalkyl;
• R 2 is - H, alkyl, halo, haloalkyl, or alkylthio;
• R 3 is -H, alkyl, or halo;
• M is a bond, -O-, -S- or -NR 6 -;
• R 4 is -H, halo, alkyl, hydroxyalkyl, haloalkyl, haloalkenyl, cycloalkyl, monoalkylamino, or dialkylamino; and
• R 5 is -H, alkyl, or halo.
• Non-limiting examplery compounds include one selected from the group consisting of: the compounds of Examples 258, 261, 265, 266, 269, 272, 275, 280, 288, 291, 293, 296, 297, 300, 304, 306, 310, 318, 320, 324, 327, 329, 330, 332, 334, 336, 341, 345, 349, 353, 356, 358, 359, 361, 366, 371, 372, 374, 390, 391, 393, 404, 405, 408, 410, 414, 417, 419, 422, 423, 425, 426, 428, 430, 433, 434, 436, 439, 441, and 445.
• R 1 is cyclopropyl which is optionally substituted with one or more groups selected from the group consisting of halo, C1-3 alkyl, C1-3 hydroxyalkyl and C1-3 haloalkyl;
• R 2 is - H, alkyl, halo, haloalkyl, or alkylthio;
• R 3 is -H, alkyl, or halo;
• M is a bond, -O-, -S- or -NR 6 -;
• R 4 is -H, halo, alkyl, alkylcarbonyl, dialkylaminocarbonyl, oxopyrrolidinyl, hydroxyalkyl, haloalkyl, haloalkenyl, cycloalkyl, pyridinyl, monoalkylamino, or dialkylamino; and
• R 5 is -H, alkyl, or halo.
• Non-limiting examplery compounds include one selected from the group consisting of the compounds of Examples 258, 261, 265, 266, 268, 269, 271-273 275, 280, 281, 288, 290, 291, 293, 296-298, 300, 304, 306, 307, 310, 316, 318, 320, 324, 326, 327, 329, 330-334, 336, 339, 341, 345, 346, 349, 353, 356, 358, 359, 361-363, 365-367, 370- 374, 377-379, 383, 388, 390, 391, 393, 398, 401, 404- 406, 408-410, 414, 415, 417, 419, 421-426, 428, 430, 433, 434, 436, 439, 441, and 445.
• R 1 , R 2 , R 3 , R 4 , R 5 , R a , R b , M, and L are as defined above for Formula (I).
• L is a bond
• R 1 is cyclopropyl which is optionally substituted with one or more groups selected from the group consisting of halo, C1-3 alkyl, C1-3 hydroxyalkyl and C1-3 haloalkyl
• R 2 is -H, alkyl, halo, haloalkyl, or alkylthio
• R 3 is -H, alkyl, or halo
• M is a bond, -O-, -S- or - NR 6 -
• R 4 is -H, halo, alkyl, hydroxyalkyl, haloalkyl, haloalkylamidoalkyl, haloalkylcarbonylaminoalkyl, alkylamidoalkyl, hydroxyhaloalkyl, haloalkenyl, cycloalkyl, cyano, cyanoalkyl, dimethylamino, dimethylaminoethyl, methyla
• Non-limiting examplery compounds of Fromula (VI) include the compound of Examples 446-666 of Table 1.
• the compound is selected from the group consisting of the compounds of Examples 464, 466, 467, 476, 477, 480, 484, 485, 487, 488, 490-494, 496, 497, 502-505, 509, 513, 514, 519-521, 523-525, 529-532, 534, 541, 543, 548, 550, 552, 556-558, 561-565, 568-574, 577, 579, 581, 585, 586, 588, 592, 596-600, 602, 607, 612, 615, 617-619, 621, 623, 625, 629, 634, 636-642, 644, 646, 650-652, 655-657, and 659-665.
• a pharmaceutical composition comprising a pharmaceutically acceptable carrier or diluent and a compound of Formula (I) or a pharmaceutically acceptable salt thereof.
• the present disclosure provides a method of treating a subject with a disease or disorder associated with modulation of HPK1 comprising: administering to the subject in need thereof a therapeutically effective amount of the compound of claim 1 or a pharmaceutically acceptable salt thereof.
• the disease or disorder associated with modulation of HPK1 is a cancer, metastasis, inflammation, or immune disease including autoimmune disease.
• the disease is cancer, metastasis, inflammation or autoimmune disease.
• the cancer is selected from the group consisting of carcinomas, melanomas, blastomas, sarcomas, lymphomas and leukemias, including without limitation, bladder carcinoma, brain tumors, breast cancer, cervical cancer, colorectal cancer, esophageal cancer, endometrial cancer, hepatocellular carcinoma, laryngeal cancer, lung cancer, osteosarcoma, ovarian cancer, pancreatic cancer, prostate cancer, renal carcinoma and thyroid cancer, acute lymphocytic leukemia, acute myeloid leukemia, ependymoma, Ewing’s sarcoma, glioblastoma, medulloblastoma, neuroblastoma, osteosarcoma, rhabdomyosarcoma, rhabdoid cancer, and nephroblastoma (Wilm’s tumor).
• the autoimmune disease is an inflammatory bowel disease, Addison's disease, alopecia areata, ankylosing spondylitis, antiphospholipid syndrome, hemolytic anemia, autoimmune hepatitis, Behcet's disease, Berger's disease, bullous pemphigoid, cardiomyopathy, celiac sprue, chronic fatigue immune dysfunction syndrome (CFIDS), chronic inflammatory demyelinating polyneuropathy, Churg-Strauss syndrome, cicatricial pemphigoid, cold agglutinin disease, type 1 diabetes, discoid lupus, essential mixed cryoglobulinemia, Graves' disease, Guillain-Barre syndrome, Hashimoto's thyroiditis, hypothyroidism, autoimmune lymphoproliferative syndrome (ALPS), idiopathic pulmonary fibrosis, idiopathic thrombocytopenia purpura (ITP), juvenile arthritis, lichen planus,
• APS autoimmune lympho
• a compound of Formula (I) or a pharmaceutically acceptable salt thereof for the manufacture of a medicament for inhibiting HPK1 activity in a subject in need of inhibition of HPK1 activity.
• the use includes treatment of cancer.
• Suitable subjects to be treated according to the present disclosure include mammalian subjects. Mammals according to the present disclosure include, but are not limited to, human, canine, feline, bovine, caprine, equine, ovine, porcine, rodents, lagomorphs, primates, and the like, and encompass mammals in utero. Subjects may be of either gender and at any stage of development. In one embodiment, the suitable subject to be treated according to the present disclosure is human.
• the compounds of the present disclosure are generally administered in a therapeutically effective amount.
• the compounds of the present disclosure can be administered by any suitable route in the form of a pharmaceutical composition adapted to such a route, and in a dose effective for the treatment intended.
• An effective dosage is typically in the range of about 0.01 to about 1000 mg per kg body weight per day, preferably about 0.01 to about 500 mg/kg/day, in single or divided doses. Depending on age, species and disease or condition being treated, dosage levels below the lower limit of this range may be suitable. In other cases, still larger doses may be used without harmful side effects. Larger doses may also be divided into several smaller doses, for administration throughout the day. Methods for determining suitable doses are well known in the art to which the present disclosure pertains. For example, Remington: The Science and Practice of Pharmacy, Mack Publishing Co., 20 th ed., 2000 can be used.
• compositions for oral administration include solid, liquid, gel or powder formulations, and have a dosage form such as tablet, lozenge, capsule, granule or powder.
• Compositions for oral administration may be formulated as immediate or modified release, including delayed or sustained release, optionally with enteric coating.
• Liquid formulations can include solutions, syrups and suspensions, which can be used in soft or hard capsules.
• Such formulations may include a pharmaceutically acceptable carrier, for example, water, ethanol, polyethylene glycol, cellulose, or an oil.
• the formulation may also include one or more emulsifying agents and/or suspending agents.
• a tablet dosage form the amount of drug present may be from about 0.05% to about 95% by weight, more typically from about 2% to about 50% by weight of the dosage form.
• tablets may contain a disintegrant, comprising from about 0.5% to about 35% by weight, more typically from about 2% to about 25% of the dosage form.
• disintegrants include, but are not limited to, lactose, starch, sodium starch glycolate, crospovidone, croscarmellose sodium, maltodextrin, or mixtures thereof.
• Suitable lubricants for use in a tablet, may be present in amounts from about 0.1 % to about 5% by weight, and include, but are not limited to, talc, silicon dioxide, stearic acid, calcium, zinc or magnesium stearate, sodium stearyl fumarate and the like.
• Suitable binders for use in a tablet, include, but are not limited to, gelatin, polyethylene glycol, sugars, gums, starch, polyvinyl pyrrolidone, hydroxypropyl cellulose, hydroxypropylmethyl cellulose and the like.
• Suitable diluents, for use in a tablet include, but are not limited to, mannitol, xylitol, lactose, dextrose, sucrose, sorbitol, microcrystalline cellulose and starch.
• Suitable solubilizers for use in a tablet, may be present in amounts from about 0.1% to about 3% by weight, and include, but are not limited to, polysorbates, sodium lauryl sulfate, sodium dodecyl sulfate, propylene carbonate, diethyleneglycol monoethyl ether, dimethyl isosorbide, polyethylene glycol (natural or hydrogenated) castor oil, HCORTM (Nikkol), oleyl ester, GelucireTM, caprylic/caprylic acid mono/diglyceride, sorbitan fatty acid esters, and Solutol HSTM.
• polysorbates sodium lauryl sulfate, sodium dodecyl sulfate, propylene carbonate, diethyleneglycol monoethyl ether, dimethyl isosorbide, polyethylene glycol (natural or hydrogenated) castor oil, HCORTM (Nikkol), oleyl ester, GelucireTM, caprylic/
• Compounds of the present disclosure may be administered directly into the blood stream, muscle, or internal organs.
• Suitable means for parenteral administration include intravenous, intramuscular, subcutaneous intraarterial, intraperitoneal, intrathecal, intracranial, and the like.
• Suitable devices for parenteral administration include injectors (including needle and needle-free injectors) and infusion methods.
• compositions for parenteral administration may be formulated as immediate or modified release, including delayed or sustained release.
• Most parenteral formulations are aqueous solutions containing excipients, including salts, buffering agents and isotonic agents.
• Parenteral formulations may also be prepared in a dehydrated form (e.g., by lyophilization) or as sterile non-aqueous solutions. These formulations can be used with a suitable vehicle, such as sterile water. Solubility-enhancing agents may also be used in preparation of parenteral solutions.
• compositions for topical administration may be administered topically to the skin or transdermally.
• Formulations for this topical administration can include lotions, solutions, creams, gels, hydrogels, ointments, foams, implants, patches and the like.
• Pharmaceutically acceptable carriers for topical administration formulations can include water, alcohol, mineral oil, glycerin, polyethylene glycol and the like.
• Topical or transdermal administration can also be performed by electroporation, iontophoresis, phonophoresis and the like.
• Compositions for topical administration may be formulated as immediate or modified release, including delayed or sustained release.
• a pharmaceutical composition according to the present disclosure may contain one or more additional therapeutic agents, for example, to increase the efficacy or decrease the side effects.
• a pharmaceutical composition further contains one or more additional therapeutic agents selected from active ingredients useful to treat or inhibit diseases mediated directly or indirectly by HPK1. Examples of such active ingredients are, without limitation, agents to treat cancer, metastasis, inflammation, or auto-immune pathogenesis.
• the compound of Formula (I) is administered with anti-PD-1 agent, anti-PD-Ll agent, or anti-CTLA4 agent.
• the present disclosure provides a compound having various pharmacological effects by inhibiting HPK1 activity, a pharmaceutical composition having the compound as an effective agent, a medical use, particularly for treating a disease or disorder modulated by HPK1, of the compound, and a method of treatment or prevention comprising administering the compound to a subject in need of such treatment or prevention.
• the compounds of the present disclosure and pharmaceutically acceptable salts thereof have good safety and high selectivity for HPK1, and thus exhibit superior property as a drug.
• Step 1) 3 -bromo-4-chloro-5-fluoro-2 -methylaniline
• Step 2) 4-bromo-5-chloro-6-fluoro-lH-indazole
• Step 3 4-bromo-5-chloro-6-fluoro-l-(tetrahydro-2H-pyran-2-yl)-lH-indazole
• Step 2) 4-bromo-5-chloro-6-fluoro-7-iodo-2-(tetrahydro-2H-pyran-2-yl)-2H-indazole
• Step 2) 4-bromo-5-chloro-6-fluoro-7-nitro-2-(tetrahydro-2H-pyran-2-yl)-2H-indazole
• Step 2) 4-bromo-5-chloro-6-fluoro-7-nitro-l-(tetrahydro-2H-pyran-2-yl)-lH-indazole
• TSOH.H2O 58.14 mg, 305.64 umol, 0.1 eq
• DHP 771.27 mg, 9.17 mmol, 838.34 uL, 3 eq
• reaction mixture was diluted with dichloromethane (20 mL), and the mixture was washed with saturated aqueous solution of NaHCO 3 (15 mL*2), the organic layer was dried over Na2SC>4, filtered and concentrated under reduced pressure to give a residue.
• Step 4) 4-bromo-5-chloro-6-fluoro-N,N-dimethyl-l-(tetrahydro-2H-pyran-2-yl)-lH- indazol-7-amine
• Step 3 4-bromo-5-chloro-N-ethyl-6-fluoro-lH-indazol-7-amine
• reaction mixture was then poured into ice water (200 mL), and the mixture was extracted with ethyl acetate (100 mL*2), the combined organic layers were washed with saturated aqueous solution of NaHCCh (100 mL*2) and brine (100 mL), dried over Na2SC>4, filtered and concentrated under reduced pressure to give a residue.
• reaction mixture was poured into water (50 mL), then the mixture was concentrated to remove MeOH, after then the mixture was extracted with ethyl acetate (50 mL*2), and the combined organic layers were washed with brine (50 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure to give a residue.
• Step 5 4-bromo-6-fluoro-N,N-dimethyl-5-(methylthio)-lH-indazol-7-amine
• Step 2) 4-bromo-5-ethyl-6-fluoro-lH-indazole
• Step 2) 6-fhioro-5-nitro-l-(tetrahydro-2H-pyran-2-yl)-lH-indazole
• 6-fhioro-l-(tetrahydro-2H-pyran-2-yl)-lH-indazol-5-amine (1.5 g, 5.87 mmol, 53.65% yield, 92% purity) was obtained as a brick-red solid.
• Step 1) 4-bromo-5-chloro-6-fluoro-l-(tetrahydro-2H-pyran-2-yl)-lH-indazole-7- carbaldehyde
• Step 2) l-(4-bromo-5-chloro-6-fluoro-l-(tetrahydro-2H-pyran-2-yl)-lH-indazol-7-yl)but-
• Step 9) 4-bromo-6-fluoro-N-isopropyl-2-(tetrahydro-2H-pyran-2-yl)-5-(trifluoromethyl)-
• Step 2) 3-bromo-5-fluoro-4-iodo-2 -methylaniline
• Step 5 4-bromo-5-cyclopropyl-6-fluoro-l-(tetrahydro-2H-pyran-2-yl)-lH-indazole
• Step 1) 4-bromo-6-fluoro-5-(prop-l-en-2-yl)-l-(tetrahydro-2H-pyran-2-yl)-lH-indazole
• Step 2) 4-bromo-6-fluoro-5 -isopropyl- l-(tetrahydro-2H-pyran-2-yl)-lH-indazole
• the reaction mixture was diluted with ice water (100 mL), and the mixture was adjusted to pH 7 by using KOH, then the mixture was extracted with EA (100 mL*2), the combined organic layers were washed with brine (50 mL*2), dried over Na2SO4, filtered and concentrated under reduced pressure to give a residue.
• Example 58 (lS.2S)-N-(6-(5-chloro-6-fluoro-7-(methylthio)-lH-indazol-4- yl)benzo[d1thiazol-2-yl)-2-fluorocvclopropane-l-carboxamide. 2 TFA
• Step 1) (lS,2S)-N-(6-(5-chloro-6-fluoro-7-(methylthio)-2-(tetrahydro-2H-pyran-2-yl)- 2H-indazol-4-yl)benzo[d]thiazol-2-yl)-2-fluorocyclopropane-l -carboxamide
• Step 2 (lS,2S)-N-(6-(5-chloro-6-fluoro-7-(methylthio)-lH-indazol-4- yl)benzo[d]thiazol-2-yl)-2-fluorocyclopropane-l-carboxamide. 2 TFA salt
• Example 149 (lS.2S)-N-(5-(5-chloro-7-ethoxy-6-fluoro-lH-indazol-4-yl)thiazolo[5.4- b1pyridin-2-yl)-2-fluorocyclopropane-l-carboxamide. 2 TFA
• Step 1) (lS,2S)-2-fluoro-N-(5-(tributylstannyl)thiazolo[5,4-b]pyridin-2-yl)cyclopropane- 1 -carboxamide
• Step 2 (lS,2S)-N-(5-(5-chforo-7-ethoxy-6-fluoro-lH-indazol-4-yl)thiazolo[5,4- b]pyridin-2-yl)-2-fluorocyclopropane-l-carboxamide. 2 TFA
• Example 149 (60 mg, 112.36 umol, 42.43% yield) was obtained as a yellow oil.
• Example 152 (lS.2S)-N-(5-(5-ethyl-6-fluoro-lH-indazol-4-yl)thiazolo[5,4-blpyridin-2- yl)-2-fluorocyclopropane-l-carboxamide
• Example 22 ( 1 S.2S)-2-fluoro-N-(6-(5 -methyl- lH-indazol-4-yl)imidazo[ 1 ,2-alpyridin- 2-yl)cyclopropane- 1 -carboxamide
• Step 1) (lS,2S)-2-fluoro-N-(6-iodoimidazo[l,2-a]pyridin-2-yl)cyclopropane-l- carboxamide
• Step 1) (2-amino-6-iodoimidazo[l,2-a]pyridin-3-yl)(cyclopropyl)methanone
• Step 2 (lS,2S)-2-fhioro-N-(6-(5-methyl-lH-indol-4-yl)imidazo[l,2-a]pyridin-2- yl)cyclopropane- 1 -carboxamide dihydrochloride [0299] To a solution of Compound 9 (10.22 g, 31.27 mmol, 1 eq) and 4, 4, 5, 5 -tetramethyl -2-
• Step 1) (lS,2S)-N-(6-(5-chloro-7-(dimethylamino)-6-fluoro-l-(tetrahydro-2H-pyran-2- yl)-lH-indazol-4-yl)imidazo[l,2-a]pyridin-2-yl)-2-fluorocyclopropane-l-carboxamide
• Step 2 (lS,2S)-N-(6-(5-chloro-7-(dimethylamino)-6-fluoro-lH-indazol-4- yl)imidazo[l,2-a]pyridin-2-yl)-2-fluorocyclopropane-l-carboxamide
• Example 258 (8.7 mg, 13.05 umol, 22.72% yield, 2 TLA) was obtained as a white solid.
• Step 1) l-(4-bromo-5-chloro-6-fluoro-l-(tetrahydro-2H-pyran-2-yl)-lH-indazol-7- yl)ethan-l-one
• Step 2) l-(4-bromo-5-chloro-6-fluoro-l-(tetrahydro-2H-pyran-2-yl)-lH-indazol-7- yl)ethan-l-ol
• Step 3 7-(l-(2H-tetrazol-2-yl)ethyl)-4-bromo-5-chloro-6-fluoro-l-(tetrahydro-2H-pyran-
• Step 4 (lS,2S)-N-(6-(7-(l-(2H-tetrazol-2-yl)ethyl)-5-chloro-6-fluoro-l-(tetrahydro-2H- pyran-2-yl)-lH-indazol-4-yl)imidazo[l,2-a]pyridin-2-yl)-2-fluorocyclopropane-l-carboxamide
• Step 5 (lS,2S)-N-(6-(7-(l-(2H-tetrazol-2-yl)ethyl)-5-chloro-6-fluoro-lH-indazol-4- yl)imidazo[l,2-a]pyridin-2-yl)-2-fluorocyclopropane-l-carboxamide
• Step 1) (lS,2S)-N-(5-bromopyrazolo[l,5-a]pyridin-2-yl)-2-fluorocyclopropane-l- carboxamide
• Step 2 (lS,2S)-2-fluoro-N-(5-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2-yl)pyrazolo[l,5- a]pyridin-2-yl)cyclopropane- 1 -carboxamide
• Table 1 shows the compounds of Examples along with general synthetic methods used to make the compound and characterization data.
• HPK1 kinase activity was measured by Promega's ADP-Glo TM kinase assay.
• 5 ng of recombinant human HPK1 (signalchem) is incubated with 5 pL of compounds (0.5% DMSO), 5 pL ofMBP (0.5 pg/pl) and 5 pL of ATP (25 pM) in buffer (40mM Tris, 7.5; 20mM MgCL; O.lmg/ml BSA; 50pM DTT.).
• the assay was started by incubating the reaction mixture in a 96-well plate at 30° C for 40 minutes.
• ADP-Glo reagent was added and the reaction was incubated at room temperature for 40-min to stop the reaction and degrade residual ATP.
• the ADP product was then converted to ATP by adding 50 uL per well of detection reagent.
• Luminescence was detected after 30-min room temperature incubation with the Molecular device I3X plate reader.
• the IC50 values were calculated from a series of percent inhibition values determined at a range of inhibitor concentration using software routines as implemented in the GraphPad Prism 7 software and SigmaPlotl3.0.
• Table 2 shows IC50 values of the invented compounds which represent + for >1000nM, ++ for 501-1000 nM, +++ for 101-500 nM, ++++ for ⁇ 100 nM.
• Human peripheral blood pan T cells were purchased from STEMCELLTM Technologies.

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