反应详情

A solution of 2-methylene-2',3'-dichloro-4'-methoxypropiophenone (40 g., 0.163 mole) in concentrated sulfuric acid (75 ml.) is allowed to stand at 25°C. for 24 hours and then is slowly poured into vigorously stirred ice water (500 ml.). The 2-methyl-5-methoxy-6,7-dichloro-1-indanone which separate (40 g.) melts at 129°C. after recrystallization from methylcyclohexane.

1. customThe 2-methyl-5-methoxy-6,7-dichloro-1-indanone which separate (40 g.) melts at 129°C.
2. customafter recrystallization from methylcyclohexane