Lithium hydroxide, monohydrate → HCID 66643734, compound

Participants

Reaction Steps

To a solution of 5-{(Z)-2-[3-(4-fluoro-phenyl)-5-methyl-isoxazol-4-yl]-vinyl}-2-methyl-2H-pyrazole-3-carboxylic acid methyl ester (6.29 mmol) in THF (14 mL) was added lithium hydroxide monohydrate (37.79 mmol) in water (18 mL) and the resulting mixture stirred for 12 h. After evaporation the mixture was diluted with water (10 mL) and citric acid (10%) and extracted with ethyl acetate (2×80 mL). The combined extracts were then dried with sodium sulfate, filtered and evaporated to afford 5-{(Z)-2-[3-(4-fluoro-phenyl)-5-methyl-isoxazol-4-yl]-vinyl}-2-methyl-2H-pyrazole-3-carboxylic acid (mg, 85%) as a white solid. MS: m/e=328.2 [M+H]+.

Provenance & Evidence