Construction of Heteroacenes with Fused Thiophene and Pyrrole Rings via the Fischer Indolization Reaction
作者:Roman A. Irgashev、Arseny A. Karmatsky、Gennady L. Rusinov、Valery N. Charushin
DOI:10.1021/acs.orglett.6b00081
日期:2016.2.19
A convenient approach to ladder-type 6H-benzo[4′,5′]thieno[2′,3′:4,5]thieno[3,2-b]indoles bearing various substituents in both terminal benzene rings has been developed. The protocol suggested for preparing these N,S-heteroacenes is based on using easily available reagents, such as cinnamic acids and arylhydrazines, which can be involved in the Fischer indole synthesis, as the key step. A similar condensed
已开发出一种方便的方法,用于在两个末端苯环中带有各种取代基的阶梯型6 H-苯并[4',5']噻吩并[2',3':4,5]噻吩并[3,2- b ]吲哚。建议的制备这些N,S-杂并蒽的方案是基于使用容易获得的试剂(例如肉桂酸和芳基肼)作为关键步骤,这些试剂可能会参与Fischer吲哚的合成。12 H-苯并[4“,5”] thieno [2“,3”:4',5'] thieno [2',3':4,5] thieno [3,2- b ]的相似稠合系统还获得了带有六个环的吲哚。