反应详情

The 4,5-dichloro-1-indanone is prepared as in Example 15 for the preparation of 6,7-dichloro-1-indanone but star6ing with 26 g of 3-(2,3-dichlorophenyl)propionic acid, 138 ml of thionyl chloride, 550 ml of anhydrous dichloromethane and 20.5 g of aluminium chloride. After recrystallization from 100 ml of boiling ethanol, 12.67 g of 4,5-dichloro-1-indanone are thus obtained which melt at 78° C.

1. customAfter recrystallization from 100 ml of boiling ethanol, 12.67 g of 4,5-dichloro-1-indanone
2. customare thus obtained which melt at 78° C.