PROCESS FOR PRODUCING DIBENZOTHIEPIN DERIVATIVE

摘要

A useful process for producing 2-(10,11-dihydro-10-oxodibenzo[b,f]thiepin-2-yl)propionic acid which comprises conducting the Friedel-Crafts reaction of 10,11-dihydrodibenzo[b,f]thiepin-10-one with 2-halogenopropionyl halide to yield a ketone derivative, reacting the same with an alcoholate to convert the same into a hydroxy acetal derivative, and subjecting the obtained derivative to a rearrangement reaction.