N,N-Dimethylaniline → 2-(tert-Butoxycarbonyloxyimino)-2-phenylacetonitrile

Participants

Reaction Steps

A solution of 2-hydroxyimino-2-phenylacetonitrile (7.3 g), dimethylaniline (6.0 g.) and tert-butyl alcohol (3.7 g.) in benzene (50 ml.) was added dropwise to a solution of phosgene (5.0 g.) in benzene (50 ml.) for 30 minutes under ice-cooling. A solution of pyridine (4.0 ml.) in benzene (20 ml.) was added dropwise to the mixture. The resultant mixture was stirred for 1 hour at the same temperature and allowed to stand overnight. Water and benzene were added to the reaction mixture and an insoluble material was filtered off. The organic layer was then washed with 1N hydrochloric acid, water, a sodium bicarbonate aqueous solution and water, and dried over magnesium sulfate. The solvent was distilled off and n-hexane and a small amount of methanol were added to the residue. An insoluble material was filtered off and the filtrate was concentrated. Methanol was added to the residue and the mixture was allowed to stand. The precipitates were collected by filtration to give 2-tert-butoxycarbonyloxyimino-2-phenylacetonitrile (3.5 g,). Mp 83° to 85° C. Water was added to the mother liquor and the mixture was allowed to stand. The precipitates were collected by filtration to give the desired compound (1.5 g.). Total yield (5.0 g.).

Provenance & Evidence