Acetyl chloride → 2-Acetyl-1,1,3,5-tetramethylindene

Participants

Reaction Conditions

Reaction Steps

To a mixture of 50.8 g 90.8% pure 1,1,2,5-tetramethyl-3-(4-methyl-benzyl)indane and 52.5 g 1,2-dichloroethane was added with stirring at 28-30° C. a mixture of 26.7 g aluminum trichloride, 14.8 g acetyl chloride and 75 g 1,2-dichloroethane in the course of one hour and twenty minutes. After an additional stirring period of 30 minutes at 20° C. the mixture was poured on ice and stirred for another hour. The organic layer was washed with subsequently 5%-sodium carbonate solution, saturated sodium chloride solution and concentrated by means of a rotatory evaporator yielding 34.9% 2-acetyl-1,1,3,5-tetramethylindene in 45.6 g residue. Recrystallization from methanol gave 99.4% pure 2-acetyl-1,1,3,5-tetramethylindene.

Provenance & Evidence