Propargyl bromide → 4-Acetylamino-1-(prop-1-yn-3-ylsulfonyl)benzene

Participants

Reaction Steps

199 g (1.0 mol) of 4-acetylaminobenzenesulfinic acid were dissolved in 1000 ml of water at pH 6, the solution was added dropwise to a solution of 140 g (1.1 mol) of 3-bromoprop-1-yne and 200 ml of THF at from 40° to 50° C., and the mixture was maintained at that temperature until the reaction had ended (check by TLC). The precipitate formed was filtered off with suction at about 10° C., washed neutral with water and dried, leaving 205 g of 4-acetylamino-1-(prop-1-yn-3-ylsulfonyl)benzene (melting point 175°-179° C.). ##STR26##

Provenance & Evidence