反应详情

A suspension of 20 g of 9,10-dibromo-9,10-dihydro-4H-benzo[4,5]cyclohepta[ 1,2-b]thiophen-4-one in 400 cc of methanol is boiled at reflux for 5 hours. 9-Bromo-9,10-dihydro-10-methoxy- 4H-benzo [4,5]cyclohepta[1,2-b]-thiophen-4-one (M.P. 103°-106°) is obtained.

1. temperatureat reflux for 5 hours