Methylamine → Benzamide, 4-chloro-N-methyl-

Participants

Reaction Steps

The starting material is prepared as follows: To a mixture of 1250 ml of a 40% aqueous solution of methylamine and 1250 ml of methylene chloride, cooled in an ice bath, is added with stirring a solution of 500 g of 4-chlorobenzoylchloride in 625 ml of methylene chloride. After the addition (50 minutes), the mixture is stirred for an additional 2 hour. The white precipitate is filtered off and air dried and the methylene chloride layer of the filtrate is dried and evaporated to give the crude 4-chloro-N-methyl-benzamide, which, after crystallization from 1200 ml of methanol melts at 158°-161°; an additional amount of the product is recovered from the mother liquor, m.p. 158°-160°.

Provenance & Evidence