Hydrochloric Acid → methyl 1-(3-chloropyridin-2-yl)-3-{[4-(trifluoromethyl)phenyl]carbamoyl}-1H-pyrazole-5-carboxylate

HRID 1630673Notes

Reaction equation

[Cl:1][C:2]1[C:3]([N:8]2[C:12]([C:13]([O:15][CH3:16])=[O:14])=[CH:11][C:10]([C:17]([OH:19])=O)=[N:9]2)=[N:4][CH:5]=[CH:6][CH:7]=1.[F:20][C:21]([F:30])([F:29])[C:22]1[CH:28]=[CH:27][C:25]([NH2:26])=[CH:24][CH:23]=1.Cl>ClCCl.CN(C)C=O.CN(C)C1C=CN=CC=1>[Cl:1][C:2]1[C:3]([N:8]2[C:12]([C:13]([O:15][CH3:16])=[O:14])=[CH:11][C:10]([C:17](=[O:19])[NH:26][C:25]3[CH:27]=[CH:28][C:22]([C:21]([F:20])([F:29])[F:30])=[CH:23][CH:24]=3)=[N:9]2)=[N:4][CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 20 °C

Procedure

A solution of 1.00 g (3.55 mmol) of 1-(3-chloropyridin-2-yl)-5-(methoxycarbonyl)-1H-pyrazole-3-carboxylic acid in 13 ml of dichloromethane and 1.3 ml of N,N-dimethylformamide was cooled to 0° C., a solution of 0.86 g (5.33 mmol) of 4-(trifluoromethyl)aniline in 3 ml of dichloromethane was added dropwise and 0.68 g (3.55 mmol) of N-ethyl-N′-3-(dimethylaminopropyl)carbodiimide×HCl and 87 mg (710 μmol) of 4-dimethylaminopyridine were added a little at a time. The mixture was stirred at 0° C. for 2 hours and at 20° C. for 16 hours. The mixture was then diluted with dichloromethane and washed successively with 1 N aqueous hydrochloric acid and water. The organic phase was dried over sodium sulphate, the solvent was removed under reduced pressure and the residue was purified on silica gel using cyclohexane/ethyl acetate=3:1→2:1. (logP: 3.54).

Workup

washwashed successively with 1 N aqueous hydrochloric acid and water
dry with materialThe organic phase was dried over sodium sulphate
customthe solvent was removed under reduced pressure
customthe residue was purified on silica gel

Sources & evidence

ORD record: ord-e73accd471de4780bf737e466f3db354
Source dataset: uspto-grants-2014_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08791139B2

Reaction notes

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