Denitrocyclisation in the synthesis of dibenzothiazepinones
摘要:
A new method has been elaborated for the synthesis of new compounds of the dibenzothiazepine series by intramolecular aromatic substitution of the nitro group.
Denitrocyclization in synthesis of dibenzo[b,f][1,4]thiazepin-11(10h)-ones and their derivatives
作者:Alexey V. Smirnov、Levan S. Kalandadze、Vladimir N. Sakharov、Mikhail V. Dorogov、Alexander V. Ivachtchenko
DOI:10.1002/jhet.5570440604
日期:2007.11
A convenient synthesis of the novel dibenzo[b,f][1,4]thiazepin-11(10H)-ones is reported. As a key step, the synthetic route includes intramolecular aromatic denitrocyclization of 2-(2,4-dinitro-phenylsulfanyl)-benzoic acid amides. Efficient procedures for denitrocyclization in the presence of different bases are developed. Reduction of the nitro group in the obtained heterocycles resulted in formation