Acetone Cyanohydrin → HCID 14800187, compound

Participants

Reaction Steps

A solution of 4-chloro-2-nitrobenzoyl chloride (5.8 g) in dry dichloromethane (10 ml) was added over 5 minutes to a stirred solution of piperidine-2,4-dione (3.0 g) and triethylamine (5.5 ml) in dry dichloromethane (100 ml) and the mixture was stirred at ambient temperature for 3 hours. Acetone cyanohydrin (0.5 ml) was added and the mixture was stirred at ambient temperature for 18 hours. The solution was washed successively with 2N hydrochloric acid (50 ml) and water (2×100 ml), dried over sodium sulphate and evaporated under reduced pressure to give a solid residue which was recrystallised from ethyl acetate (70 ml) to give 3-(4-chloro-2-nitrobenzoyl)piperidine-2,4-dione (1.6 g), mp 161°-164° C., as a light brown crystalline solid.

Provenance & Evidence