反应详情

A solution of 4-(6-hydroxybenzothiazol-2-ylcarbamoyl)piperidine-1-carboxylic acid tert-butyl ester (intermediate 2) (454 mg, 1.20 mmol), of 4-fluoro-benzenesulfonyl chloride (234 mg, 1.20 mmol) and of triethylamine (320 μl) in 10 ml of acetone is stirred at room temperature for 1 hour. The triethylamine hydrochloride is filtered off and the filtrate is evaporated. The crude reaction product is purified by column chromatography (eluent: EtOAc/heptane (7/3)) to give 400 mg of 4-fluorobenzenesulfonic 2-[(piperidine-4-carbonyl)amino]-benzothiazol-6-yl ester (white solid).

1. filtrationThe triethylamine hydrochloride is filtered off
2. customthe filtrate is evaporated
3. customThe crude reaction product
4. customis purified by column chromatography (eluent: EtOAc/heptane (7/3))