A Convenient Synthesis of Pyrido[3,2-b][1,4]bensothiazine Derivatives via Oxidative Ring Closure of 3-Substituted 6-[N-(2-Mercaptophenyl)]aminopyridines
摘要:
3-Substituted pyrido[3,2-b] [1,4] benzothiazines were prepared either by heating the disulfide derivatives, which were obtained by a treatment of 3-substituted 6-[N-(2-mercaptophenyl)]aminopyridines with diethyl azodicarboxylate (DEAD) or NBS in DMF at room temperature under the basic conditions or directly by heating the reaction mixture 3-substituted 6-[N-(2-mercaptophenyl)]aminopyridines.
A Convenient Synthesis of Pyrido[3,2-b][1,4]bensothiazine Derivatives via Oxidative Ring Closure of 3-Substituted 6-[N-(2-Mercaptophenyl)]aminopyridines
摘要:
3-Substituted pyrido[3,2-b] [1,4] benzothiazines were prepared either by heating the disulfide derivatives, which were obtained by a treatment of 3-substituted 6-[N-(2-mercaptophenyl)]aminopyridines with diethyl azodicarboxylate (DEAD) or NBS in DMF at room temperature under the basic conditions or directly by heating the reaction mixture 3-substituted 6-[N-(2-mercaptophenyl)]aminopyridines.