PROCESS FOR PRODUCING DIBENZOTHIAZEPINE DERIVATIVES

摘要

A process for producing dibenzothiazepine derivatives typified by dibenzo[b,f][1,4]thiazepin-11-one which are usable as the starting material for producing 11-[4-(2-(2-hydroxyethoxy)ethyl)]-1-piperazinyldibenzothiazepine derivatives useful as a psychotropic drug, which comprises reacting a nitrobenzene derivative with a thiosalicylic acid derivative, reducing the thus obtained 2-nitro-2'-carboxy-diphenylsulfide derivative, and then further dehydrating and condensing the thus obtained 2-amino-2'-carboxy-diphenylsulfide derivative.