Hydrochloric Acid → 3-(3-Cyano-4-hydroxy-5-trifluoromethylbenzoyl)-2,3-dihydro-1,3-benzothiazole

Participants

Reaction Conditions

Reaction Steps

3-(3-cyano-4-methoxy-5-trifluoromethylbenzoyl)-2,3-dihydro-1,3-benzothiazole (232 mg) was dissolved in N,N-dimethylformamide (3 mL), and lithium chloride (108 mg) was added to the solution, and then the mixture was stirred at 70° C. for 1 hour. To the reaction solution, 1N hydrochloric acid was added, and then the mixture was extracted with ethyl acetate. The organic layer was washed with 1N hydrochloric acid and saturated brine, and then dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure and the obtained residue was crystallized from n-hexane-ethyl acetate to obtain the title compound (131 mg) as a brown crystal.

Provenance & Evidence