# US 11,897,876 B2 · Isoxazolidines as RIPK1 inhibitors and use thereof

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- Number: US 11,897,876 B2
- Document ID: US11897876B2
- Status: Granted
- Kind: B2
- Application number: 17/983,883
- Filed: 2022-11-09
- Published: 2023-06-29
- Granted: 2024-02-13
- Earliest claimed: 2022-11-09
- Assignees: Genzyme Corporation
- Applicants: Genzyme Corporation
- Inventors: Elisabeth Defossa; Uwe Heinelt; Hans Matter; Maria Mendez-Perez; Nils Rackelmann; Kurt Ritter; Hauke Szillat; Gernot Zech
- Web page: https://patentgrep.com/patent/US11897876B2

## CPC

- C07D 413/14: containing three or more hetero rings
- C07D 417/14: containing three or more hetero rings
- A61P 29/00: Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- A61P: SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS

## Abstract

The present disclosure relates to isoxazolidines and their use as receptor-interacting protein kinase 1 inhibitors, for example in the treatment of diseases and disorders mediated by RIP kinase 1.

## Claims

### Claim 1

A compound of formula I:
wherein
A represents a five-membered heteroaryl group in which 2 or 3 ring atoms are independently selected from nitrogen, which is optionally substituted by R3 and R4;
R1 represents H or CH3,
R2 represents Cl, F or CN,
R3 represents H or CH3,
R4 represents H, CH3 or cyclopropyl,
R5 represents H or F;
or a pharmaceutically acceptable salt, solvate, or stereoisomer thereof.

### Claim 2 (depends on 1)

A compound of the formula I according to claim 1, wherein A is selected from imidazole, pyrazole and triazole, which is optionally substituted by R3 and R4;
or a pharmaceutically acceptable salt, solvate, or stereoisomer thereof.

### Claim 3 (depends on 1)

A compound of the formula I according to claim 1,
wherein
A represents a heteroaryl selected from
wherein the dashed line indicates the bond to the pyrimidine ring of formula I;
R3 represents H or CH3,
R4 represents H, CH3 or cyclopropyl,
or a pharmaceutically acceptable salt, solvate, or stereoisomer thereof.

### Claim 4 (depends on 1)

A compound of the formula I according to claim 1,
wherein
A represents a heteroaryl selected from
1-imidazolyl and 3-pyrazolyl,
which is optionally substituted by R3 and R4;
or a pharmaceutically acceptable salt, solvate, or stereoisomer thereof.

### Claim 5 (depends on 1)

A compound of the formula I according to claim 1, wherein
A represents a heteroaryl selected from 1-imidazolyl and 3-pyrazolyl,
R1 represents H,
R2 represents CN,
R3 represents CH3,
R4 represents H,
R5 represents H or F;
or a pharmaceutically acceptable salt, solvate, or stereoisomer thereof.

### Claim 6 (depends on 1)

A compound of the formula I according to claim 1, wherein the compound of formula I is selected from
3-fluoro-5-[(3S)-2-[1-[6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-2-methyl-5-[(3S)-2-[1-[6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-5-[(3S)-2-[1-[6-(2-methylpyrazol-3-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
[(3S)-3-(3,5-difluorophenyl)isoxazolidin-2-yl]-[1-[6-(2-methylpyrazol-3-yl)pyrimidin-4-yl]-4-piperidyl]methanone;
[(3S)-3-(3-chloro-5-fluoro-phenyl)isoxazolidin-2-yl]-[1-[6-(2-methylpyrazol-3-yl)pyrimidin-4-yl]-4-piperidyl]methanone;
3-fluoro-5-[(3S)-2-[1-[6-(3-methyl-1H-pyrazol-4-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-[(3S)-2-[1-[6-(4-cyclopropyl-2-methyl-imidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]-5-fluoro-benzonitrile;
5-[(3S)-2-[1-[6-(4-cyclopropyl-2-methyl-imidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]-3-fluoro-2-methyl-benzonitrile;
3-[(3S)-2-[1-[6-(2,5-dimethylpyrazol-3-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]-5-fluoro-benzonitrile;
3-fluoro-5-[(3S)-2-[1-[6-(3-methyl-1,2,4-triazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-5-[(3S)-2-[1-[6-(5-methyl-1,2,4-triazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-5-[(3S)-2-[1-[6-(3-methyltriazol-4-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-5-[(3S)-2-[1-[5-fluoro-6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-5-[(3S)-2-[1-[5-fluoro-6-(4-methylpyrazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]-2-methyl-benzonitrile; and
[(3S)-3-(3,5-difluorophenyl)isoxazolidin-2-yl]-[1-[5-fluoro-6-(2-methylpyrazol-3-yl)pyrimidin-4-yl]-4-piperidyl]methanone;
or a pharmaceutically acceptable salt, solvate, or stereoisomer thereof.

### Claim 7 (depends on 1)

A compound of the formula I according to claim 1, wherein the compound of formula I is 3-fluoro-5-[(3S)-2-[1-[6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
or a pharmaceutically acceptable salt, solvate, or stereoisomer thereof.

### Claim 8 (depends on 1)

A compound of the formula I according to claim 1, wherein the compound of formula I is 3-fluoro-5-[(3S)-2-[1-[6-(2-methylpyrazol-3-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
or a pharmaceutically acceptable salt, solvate, or stereoisomer thereof.

### Claim 9 (depends on 1)

A compound of the formula I according to claim 1, wherein the compound of formula I is 3-fluoro-5-[(3S)-2-[1-[5-fluoro-6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
or a pharmaceutically acceptable salt, solvate, or stereoisomer thereof.

### Claim 10 (depends on 1)

A pharmaceutical composition comprising a compound according to claim 1 and at least one pharmaceutically acceptable carrier.

### Claim 11 (depends on 1)

A pharmaceutical composition comprising a compound according to claim 1, at least one pharmaceutically acceptable carrier and one or more additional active pharmaceutical agent selected from a thrombolytic agent, a tissue plasminogen activator, an anticoagulant, a platelet aggregation inhibitor, an antimicrobial agent, a long acting beta agonist, a combination of an inhaled corticosteroid and a long acting beta agonist, a short acting beta agonist, a leukotriene modifier, an anti-IgE, a methylxanthine bronchodilator, a mast cell inhibitor, a protein tyrosine kinase inhibitor, a CRTH2/D prostanoid receptor antagonist, an epinephrine inhalation aerosol, a phosphodiesterase inhibitor, a combination of a phosphodiesterase-3 inhibitor and a phosphodiesterase-4 inhibitor, a long-acting inhaled anticholinergic, a muscarinic antagonist, a long-acting muscarinic antagonist, a low dose steroid, an inhaled corticosteroid, an oral corticosteroid, a topical corticosteroid, anti-thymocyte globulin, thalidomide, chlorambucil, a calcium channel blocker, a topical emollient, an ACE inhibitor, a serotonin reuptake inhibitor, an endothelin-I receptor inhibitor, an anti-fibrotic agent, a proton-pump inhibitor, a cystic fibrosis transmembrane conductance regulator potentiator, a mucolytic agent, pancreatic enzymes, a bronchodilator, an opthalmalic intravitreal injection, an anti-vascular endothelial growth factor inhibitor, a ciliary neurotrophic growth factor agent, a trivalent (IIV3) inactivated influenza vaccine, a quadrivalent (IIV4) inactivated influenza vaccine, a trivalent recombinant influenza vaccine, a quadrivalent live attenuated influenza vaccine, an antiviral agent, inactivated influenza vaccine, a ciliary neurotrophic growth factor, a gene transfer agent, a topical immunomodulator, calcineurin inhibitor, an interferon gamma, an antihistamine, a monoclonal antibody, a polyclonal anti-Tcell antibody, an anti-thymocyte gamma globulin-equine antibody, an antithymocyte globulin-rabbit antibody, an anti-CD40 antagonist, a JAK inhibitor, and an anti-TCR murine mAb.

### Claim 12 (depends on 1)

A method of treating a disease or disorder comprising administering to the subject in need thereof a compound according to claim 1, wherein the disease or disorder is selected from necrotizing enterocolitis, tuberous sclerosis, Tangier's Disease, Wohlman's Syndrome, inflammatory bowel disease, Crohn's disease, ulcerative colitis, psoriasis, retinal detachment, retinitis pigmentosa, macular degeneration, pancreatitis, atopic dermatitis, rheumatoid arthritis, psoriatic arthritis, spondyloarthritis, gout, systemic onset juvenile idiopathic arthritis (SoJIA), systemic lupus erythematosus, Sjogren's syndrome, systemic scleroderma, anti-phospholipid syndrome, vasculitis, osteoarthritis, non-alcohol steatohepatitis, alcohol steatohepatitis, autoimmune hepatitis autoimmune hepatobiliary diseases, primary sclerosing cholangitis, nephritis, Celiac disease, autoimmune ITP, transplant rejection, ischemia, ischemia reperfusion injury of solid organs, cerebral ischemia, sepsis, systemic inflammatory response syndrome, cerebrovascular accident, myocardial infarction, Huntington's disease, Alzheimer's disease, Parkinson's disease, allergic diseases, asthma, atopic dermatitis, multiple sclerosis, type I diabetes, Wegener's granulomatosis, pulmonary sarcoidosis, Behçet's disease, interleukin-1 converting enzyme associated fever syndrome, chronic obstructive pulmonary disease, tumor necrosis factor receptor-associated periodic syndrome, periodontitis, infection, bacterial infection, staphylococcus infection, mycobacterium infection, influenza, transplant rejection, burns, hypoxia, trauma, stroke, cardiac infarction, lysosomal storage disease, Niemann-Pick disease, Gaucher's disease, Krabbe disease, amyotrophic lateral sclerosis (ALS/Lou Gehrig's Disease), HIV-associated dementia, encephalopathy, retinal degenerative disease, glaucoma, age-related macular degeneration, Friedreich's ataxia, Lewy body disease, diabetic neuropathy, polyglutamine (polyQ) diseases, Fahr disease, Menke's disease, Wilson's disease, a prion disorder, atherosclerosis, Guillain-Barre syndrome, chronic inflammatory demyelinating polyneuropathy, major depressive disorder, bipolar disorder, delirium, post-operative cognitive impairment, autism, schizophrenia, hidradenitis suppurativa and incontinentia pigmenti.

### Claim 13 (depends on 12)

The method according to claim 12, wherein the disease or disorder is selected from Alzheimer's disease, multiple sclerosis, amyotrophic lateral sclerosis (ALS) and incontinentia pigmenti.

### Claim 14 (depends on 12)

The method according to claim 12, wherein the disease or disorder is Alzheimer's disease.

### Claim 15 (depends on 12)

The method according to claim 12, wherein the disease or disorder is multiple sclerosis.

### Claim 16 (depends on 12)

The method according to claim 12, wherein the disease or disorder is amyotrophic lateral sclerosis (ALS).

### Claim 17 (depends on 12)

The method according to claim 12, wherein the disease or disorder is incontinentia pigmenti.

### Claim 18

A compound of formula I:
wherein
A represents a five-membered heteroaryl group in which 2 or 3 ring atoms are independently selected from nitrogen, which is optionally substituted by R3 and R4;
R1 represents H or CH3,
R2 represents Cl, F or CN,
R3 represents H or CH3,
R4 represents H, CH3 or cyclopropyl,
R5 represents H or F;
or a pharmaceutically acceptable salt thereof.

### Claim 19 (depends on 18)

A compound of the formula I according to claim 18, wherein A is selected from imidazole, pyrazole and triazole, which is optionally substituted by R3 and R4;
or a pharmaceutically acceptable salt thereof.

### Claim 20 (depends on 18)

A compound of the formula I according to claim 18,
wherein
A represents a heteroaryl selected from
wherein the dashed line indicates the bond to the pyrimidine ring of formula I;
R3 represents H or CH3,
R4 represents H, CH3 or cyclopropyl,
or a pharmaceutically acceptable salt thereof.

### Claim 21 (depends on 18)

A compound of the formula I according to claim 18, wherein the compound of formula I is selected from
3-fluoro-5-[(3S)-2-[1-[6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-2-methyl-5-[(3S)-2-[1-[6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-5-[(3S)-2-[1-[6-(2-methylpyrazol-3-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
[(3S)-3-(3,5-difluorophenyl)isoxazolidin-2-yl]-[1-[6-(2-methylpyrazol-3-yl)pyrimidin-4-yl]-4-piperidyl]methanone;
[(3S)-3-(3-chloro-5-fluoro-phenyl)isoxazolidin-2-yl]-[1-[6-(2-methylpyrazol-3-yl)pyrimidin-4-yl]-4-piperidyl]methanone;
3-fluoro-5-[(3S)-2-[1-[6-(3-methyl-1H-pyrazol-4-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-[(3S)-2-[1-[6-(4-cyclopropyl-2-methyl-imidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]-5-fluoro-benzonitrile;
5-[(3S)-2-[1-[6-(4-cyclopropyl-2-methyl-imidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]-3-fluoro-2-methyl-benzonitrile;
3-[(3S)-2-[1-[6-(2,5-dimethylpyrazol-3-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]-5-fluoro-benzonitrile;
3-fluoro-5-[(3S)-2-[1-[6-(3-methyl-1,2,4-triazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-5-[(3S)-2-[1-[6-(5-methyl-1,2,4-triazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-5-[(3S)-2-[1-[6-(3-methyltriazol-4-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-5-[(3S)-2-[1-[5-fluoro-6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
3-fluoro-5-[(3S)-2-[1-[5-fluoro-6-(4-methylpyrazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]-2-methyl-benzonitrile; and
[(3S)-3-(3,5-difluorophenyl)isoxazolidin-2-yl]-[1-[5-fluoro-6-(2-methylpyrazol-3-yl)pyrimidin-4-yl]-4-piperidyl]methanone;
or a pharmaceutically acceptable salt thereof.

### Claim 22 (depends on 18)

A compound of the formula I according to claim 18, wherein the compound is 3-fluoro-5-[(3S)-2-[1-[6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
or a pharmaceutically acceptable salt thereof.

### Claim 23 (depends on 22)

A compound of the formula I according to claim 22, wherein the compound is 3-fluoro-5-[(3S)-2-[1-[6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile.

### Claim 24 (depends on 18)

A compound of the formula I according to claim 18, wherein the compound is 3-fluoro-5-[(3S)-2-[1-[6-(2-methylpyrazol-3-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
or a pharmaceutically acceptable thereof.

### Claim 25 (depends on 24)

A compound of the formula I according to claim 24, wherein the compound is 3-fluoro-5-[(3S)-2-[1-[6-(2-methylpyrazol-3-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile.

### Claim 26 (depends on 18)

A compound of the formula I according to claim 18, wherein the compound is 3-fluoro-5-[(3S)-2-[1-[5-fluoro-6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile;
or a pharmaceutically acceptable salt thereof.

### Claim 27 (depends on 26)

A compound of the formula I according to claim 26, wherein the compound is 3-fluoro-5-[(3S)-2-[1-[5-fluoro-6-(2-methylimidazol-1-yl)pyrimidin-4-yl]piperidine-4-carbonyl]isoxazolidin-3-yl]benzonitrile.