Sulfuric Acid → HCID 12423586, compound

Participants

Reaction Steps

2',3'-Dichloro-4'-methoxy-2-(4-bromophenyl)acrylophenone (143 g., 0.37 mole) dissolved in dichloromethane (2 l.) is drizzled into cold 36 N sulfuric acid (1 l.)-dichloromethane (1 l.) in an ice bath over 4 hours. After stirring for an additional half hour, the reaction mixture is slowly added to crushed ice, the dichloromethane layer separated, washed with saturated salt solution, concentrated in vacuo to give 134.8 g. of 2-(4-bromophenyl)-5-methoxy-6,7-dichloro-1-indanone which melts at 202°-203° C. after trituration with water followed by crystallization from benzene:hexane, 1:1.

Provenance & Evidence