Sodium Hydroxide → HCID 86692504, compound
Reaction equation
C([O:3][C:4]([C:6]1[CH:7]=[N:8][N:9]([C:12]2[C:17]([F:18])=[CH:16][C:15]([C:19]([F:22])([F:21])[F:20])=[CH:14][N:13]=2)[C:10]=1[CH3:11])=[O:5])C.[OH-].[Na+]>O1CCCC1>[F:18][C:17]1[C:12]([N:9]2[C:10]([CH3:11])=[C:6]([C:4]([OH:5])=[O:3])[CH:7]=[N:8]2)=[N:13][CH:14]=[C:15]([C:19]([F:22])([F:20])[F:21])[CH:16]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
To a solution of 1-[3-fluoro-5-(trifluoromethyl)pyridin-2-yl]-5-methyl-1H-pyrazole-4-carboxylic acid ethyl ester (2.17 g) in tetrahydrofuran (10 ml) was added 1 N aqueous solution of sodium hydroxide (10 ml), and stirred at room temperature overnight. After completion of the reaction, the organic solvent was evaporated in vacuo, then water and diethyl ether were added thereto, and the aqueous layer was separated. To the aqueous layer was added 1 N hydrochloric acid aqueous solution under ice-cooling to adjust the layer to pH 5, the precipitated solid was collected by filtration, and dried at 60° C. under air blow to give the titled compound (1.7 g) as a white solid. MS (ESI) m/z: 290 (M+H)+.