Ethyl chloroformate → Ethyl [2-(benzo[b]thiophen-2-yl)ethyl]carbamate

참여 물질

반응 단계

Ethyl chloroformate (0.18 ml) was added dropwise to a stirred, ice-cooled solution of benzo[b]thiophene-2-ethanamine (300 mg) in a mixture of chloroform (8 ml) and triethylamine (0.28 ml) under nitrogen and stirring was continued at 0° for 30 min. The solution was evaporated, the residue was treated with water (10 ml), extracted with dichloromethane (3×10 ml) and the combined, dried organic extracts were evaporated to give an oily solid. This was purified by FCC eluting with System B (1:2) to give the title compound (313 mg), m.p. 65°-66°.

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