Diisopropylethylamine → N-[2-(4-chlorophenyl)-2-oxoethyl]-N'-cyclopropylurea

Participants

Reaction Conditions

Reaction Steps

1000 mg (4.853 mmol) of 2-amino-1-(4-chlorophenyl)ethanone hydrochloride are placed in 20 ml dichloromethane, cooled to 0° C. and treated dropwise with a solution of 363 mg (4.367 mmol) of cyclopropyl isocyanate in 2 ml dichloromethane. It is stirred a further 10 mins at 0° C. and then a solution of 627 mg (4.853 mmol) of N,N-diisopropylethylamine in 4 ml dichloromethane is added dropwise. After two hours' stirring at room temperature the reaction mixture is evaporated and the crude product purified by flash chromatography on silica gel (eluent: dichloromethane/methanol 100:1). 1000 mg (73% of theory) of the target compound are obtained.

Provenance & Evidence