# US 10,308,659 B2 · Pyridine derivatives

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- Number: US 10,308,659 B2
- Document ID: US10308659B2
- Status: Granted
- Kind: B2
- Application number: 14/868,305
- Filed: 2015-09-28
- Published: 2016-01-21
- Granted: 2019-06-04
- Earliest claimed: 2013-03-26
- Assignees: Hoffmann-La Roche Inc.
- Applicants: Hoffmann-La Roche Inc.
- Inventors: Olivier Gavelle; Uwe Grether; Atsushi Kimbara; Matthias Nettekoven; Roever Stephan; Mark Rogers-Evans; Didier Rombach; Tanja Schulz-Gasch
- Web page: https://patentgrep.com/patent/US10308659B2

## CPC

- C07D 491/107: with only one oxygen atom as ring hetero atom in the oxygen-containing ring
- A61P 1/02: Stomatological preparations, e.g. drugs for caries, aphtae, periodontitis
- A61P 1/04: for ulcers, gastritis or reflux esophagitis, e.g. antacids, inhibitors of acid secretion, mucosal protectants
- A61P 1/16: for liver or gallbladder disorders, e.g. hepatoprotective agents, cholagogues, litholytics
- A61P 3/10: for hyperglycaemia, e.g. antidiabetics
- A61P 9/00: Drugs for disorders of the cardiovascular system
- A61P 9/04: Inotropic agents, i.e. stimulants of cardiac contraction; Drugs for heart failure
- A61P 9/10: for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
- A61P 11/00: Drugs for disorders of the respiratory system
- A61P 13/12: of the kidneys
- A61P 17/02: for treating wounds, ulcers, burns, scars, keloids, or the like
- A61P 19/08: for bone diseases, e.g. rachitism, Paget's disease
- A61P 21/00: Drugs for disorders of the muscular or neuromuscular system
- A61P 25/00: Drugs for disorders of the nervous system
- A61P 25/04: Centrally acting analgesics, e.g. opioids
- A61P 25/16: Anti-Parkinson drugs
- A61P 25/28: for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
- A61P 27/02: Ophthalmic agents
- A61P 27/06: Antiglaucoma agents or miotics
- A61P 29/00: Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
- A61P 29/02: without antiinflammatory effect
- A61P 35/00: Antineoplastic agents
- A61P 37/06: Immunosuppressants, e.g. drugs for graft rejection
- A61P 43/00: Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
- C07D 401/04: directly linked by a ring-member-to-ring-member bond
- C07D 401/14: containing three or more hetero rings
- C07D 403/04: directly linked by a ring-member-to-ring-member bond
- C07D 413/04: directly linked by a ring-member-to-ring-member bond
- C07D 413/14: containing three or more hetero rings
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- A61P: SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS

## Abstract

The invention relates to a compound of formula (I) wherein A and R1 to R4 are defined as in the description and in the claims. The compound of formula (I) can be used as a medicament.

## Claims

### Claim 1

A compound selected from the group consisting of:
5-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-3-methyl-1,2,4-oxadiazole;
5[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-3-phenyl-1,2,4-oxadiazole;
3-cyclopropyl-5-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
3-cyclopentyl-5-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
3-benzyl-5-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]1,2,4-oxadiazole;
3-tert-butyl-5-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
3-cyclopropyl-5-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-3-(trifluoromethyl)-1,2,4-oxadiazole;
5-cyclopropyl-3-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
3-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-5-(methoxymethyl)-1,2,4-oxadiazole;
3-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-5-ethyl-1,2,4-oxadiazole;
3-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-5-propan-2-yl-1,2,4-oxadiazole;
[3-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-1,2,4-oxadiazol-5-yl]methanol;
3-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-5-(trifluoromethyl)-1,2,4-oxadiazole;
1-[3-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-1,2,4-oxadiazol-5-yl]cyclopropan-1-ol;
3-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-5-(1-methylcyclopropyl)-1,2,4-oxadiazole;
1-[3-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-1,2,4-oxadiazol-5-yl]cyclopropane-1-carboxamide;
2-[3-[5-cyclopropyl-4-(cyclopropylmethoxy)pyridin-2-yl]-1,2,4-oxadiazol-5-yl]propan-2-ol;
5-tert-butyl-3-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
3-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-5-(1-methylcyclopropyl)-1,2,4-oxadiazole;
3-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-5-propan-2-yl-1,2,4-oxadiazole;
1-[3-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazol-5-yl]cyclopropan-1-ol;
3-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
3-tert-butyl-5-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-3 -propan-2-yl-1,2,4-oxadiazole;
5-tert-butyl-3-[4-(cyclopropylmethoxy)-5-methylsulfonylpyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[(2S)-1,1,1-trifluoropropan-2-yl]oxypyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[(2R)-1,1,1-trifluoropropan-2-yl]oxypyridin-2-yl]-1,2,4-oxadiazole;
3-tert-butyl-5-[5-cyclopropyl-4-[(2R)-1,1,1-trifluoropropan-2-yl]oxypyridin-2-yl]-1,2,4-oxadiazole;
3-tert-butyl-5-[5-cyclopropyl-4-[(2S)-1,1,1-trifluoropropan-2-yl]oxypyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3[5-cyclopropyl-4-[(4-fluorophenyl)methoxy]pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[(3-methyloxetan-3-yl)methoxy]pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(oxolan-2-ylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[[(2S)-1-methylpyrrolidin-2-yl]methoxy]pyridin -2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(oxetan-2-ylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(4-fluorophenoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-methylsulfonyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-chloro-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
3-[5-chloro-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-5-cyclopropyl-1,2,4-oxadiazole;
5-cyclopropyl-3-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(4-methylsulfonylphenoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-(5-cyclopropyl-4-cyclopropylsulfonylpyridin-2-yl)-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(2-ethoxyethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(1-methoxybutan-2-yloxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3[5-cyclopropyl-4-[2-[(2-methylpropan-2-yl)oxy]ethoxy]pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[1-[(2-methylpropan-2-yl)oxy]propan-2-yloxy]pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5cyclopropyl-4-(1-methoxypropan-2-yloxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(3-methoxybutoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(oxetan-3-ylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-cyclopropyl-3-[5-cyclopropyl-4-[(2S)-1,1,1-trifluoropropan-2-yl]oxypyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(2-pyrrolidin-l-ylethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(2-piperidin-l-ylethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(1-piperidin-1-ylpropan-2-yloxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[(1-methylpiperidin-2-yl)methoxy]pyridin-2-yl]-1,2,4-oxadiazole;
2-[2-(5-tert-butyl-1,2,4-oxadiazol-3-yl)-5-cyclopropylpyridin-4-yl]oxy-N,N-diethylpropan-1-amine;
3-[[2-(5-tert-butyl-1,2,4-oxadiazol-3-yl)-5-cyclopropylpyridin-4-yl]oxyethyl]morpholine;
4-[2-[2-(5-tert-butyl-1,2,4-oxadiazol-3-yl)-5-cyclopropylpyridin-4-yl]oxyethyl]morpholine;
5-tert-butyl-3-[5-cyclopropyl-4-[(3-fluorooxetan-3-yl)methoxy]pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[(2,5-dimethyl-1,3-oxazol-4-yl)methoxy]pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[(5-methyl-1,2-oxazol-3-yl)methoxy]pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(3-methylsulfonylphenoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-(6-chloro-5-cyclopropyl-4-(4-fluorobenzyloxy)pyridin-2-yl)-1,2,4-oxadiazole;
2-tert-butyl-5-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,3,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(2,2-difluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(2-fluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(pyridin-2-ylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[(5-fluoropyridin-2-yl)methoxy]pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(pyridin-3-ylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
2-tert-butyl-5-[5-cyclopropyl-4-[(2S)-1,1,1-trifluoropropan-2-yl]oxypyridin-2-yl]-1,3,4-oxadiazole;
3-tert-butyl-5-[5-cyclopropyl-4-[[(2S)-1-methylpyrrolidin-2-yl]methoxy]pyridin-2-yl]-1,2,4-oxadiazole; and
3-tert-butyl-5-(5-cyclopropyl-4-(2,2-difluoroethoxy)pyridin-2-yl)-1,2,4-oxadiazole;
or a pharmaceutically acceptable salt thereof.

### Claim 2

A compound selected from the group consisting of:
5-tert-butyl-3-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
3 -tert-butyl-5-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[(3-methyloxetan-3-yl)methoxy]pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(oxolan-2-ylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(4-fluorophenoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(2-ethoxyethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(3-methoxybutoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(oxetan-3-ylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[(5-fluoropyridin-2-yl)methoxy]pyridin-2-yl]-1,2,4-oxadiazole;
3-tert-butyl-5-(5-cyclopropyl-4-(2,2-difluoroethoxy)pyridin-2-yl)-1,2,4-oxadiazole;
or a pharmaceutically acceptable salt thereof.

### Claim 3 (depends on 2)

A compound of claim 2 selected from the group consisting of:
5-tert-butyl-3-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[(3-methyloxetan-3-yl)methoxy]pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(oxolan-2-ylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(4-fluorophenoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(2-ethoxyethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(3-methoxybutoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-(oxetan-3-ylmethoxy)pyridin-2-yl]-1,2,4-oxadiazole;
5-tert-butyl-3-[5-cyclopropyl-4-[(5-fluoropyridin-2-yl)methoxy]pyridin-2-yl]-1,2,4-oxadiazole;
or a pharmaceutically acceptable salt thereof.

### Claim 4 (depends on 2)

A compound of claim 2 selected from the group consisting of:
3-tert-butyl-5-(5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl)-1,2,4-oxadiazole;
3-tert-butyl-5-(5-cyclopropyl-4-(2,2-difluoroethoxy)pyridin-2-yl)-1,2,4-oxadiazole;
or a pharmaceutically acceptable salt thereof.

### Claim 5 (depends on 1)

A pharmaceutical composition comprising a compound of claim 1, or a pharmaceutically acceptable salt thereof, and a therapeutically inert carrier.

### Claim 6 (depends on 2)

A pharmaceutical composition comprising a compound of claim 2, or a pharmaceutically acceptable salt thereof, and a therapeutically inert carrier.

### Claim 7 (depends on 3)

A pharmaceutical composition comprising a compound of claim 3, or a pharmaceutically acceptable salt thereof, and a therapeutically inert carrier.

### Claim 8 (depends on 4)

A pharmaceutical composition comprising a compound of claim 4, or a pharmaceutically acceptable salt thereof, and a therapeutically inert carrier.

### Claim 9

A compound, which is 3-tert-butyl-5-[5-cyclopropyl-4-(2,2,2-trifluoroethoxy)pyridin-2-yl]-1,2,4-oxadiazole, or a pharmaceutically acceptable salt thereof.

### Claim 10 (depends on 9)

A pharmaceutical composition comprising a compound of claim 9, or a pharmaceutically acceptable salt thereof, and a therapeutically inert carrier.