Water → N-(3-{[2-(acetylamino)-1,3-benzothiazol-6-yl]oxy}phenyl)-3-(1-cyanocyclopropyl)benzamide

Participants

Reaction Steps

To a solution of N-{3-[(2-amino-1,3-benzothiazol-6-yl)oxy]phenyl}-3-(1-cyanocyclopropyl)benzamide (200 mg, 0.47 mmol) produced in Example A15(iii) in tetrahydrofuran (20 mL) were added acetyl chloride (0.3 mL, 4.22 mmol) and triethylamine (1.0 mL, 7.18 mmol), and the mixture was stirred at room temperature for 10 min. To the reaction mixture were added water (200 mL) and ethyl acetate (200 mL) and the mixture was stirred for 30 min. The organic layer was separated, and dried over anhydrous magnesium sulfate. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel chromatography (hexane/ethyl acetate=20/80→0/100), and triturated with ethyl acetate/hexane to give the title compound (151 mg, 69%) as a colorless solid.

Provenance & Evidence