Hydrochloric Acid → 5-(trifluoromethyl)-1-({4-[3-(trifluoromethyl)phenyl]-1,3-thiazol-2-yl}methyl)-1H-pyrazole-4-carboxylic acid

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Reaction Steps

A mixture of the compound (0.13 g) obtained in Example 103d, 4N sodium hydroxide (1 mL), ethanol (2 mL) and tetrahydrofuran (0.5 mL) was stirred at room temperature for 20 hr. The reaction mixture was adjusted to pH 5 with 1N hydrochloric acid, and ethyl acetate and water were added. The ethyl acetate layer was separated, dried over sodium sulfate, and concentrated under reduced pressure to give the title compound (0.12 g) as colorless crystals.

Provenance & Evidence