反应详情

Heat 3 g. of methyl 5-bromo-3-phenyl-benzo[b]-thiophene-2-carboxylate in a mixture of 50 ml. of methanol and 30 ml of 10% sodium hydroxide under reflux for one hour. Add concentrated hydrochloric acid to yield the title compound as a precipitate. Recrystallize it from benzene; m.p. 265°-266°.

1. temperatureHeat 3 g