Modular synthesis of pyrrolo[2,1-b]thiazoles and related monocyclic pyrrolo structures
作者:Emma E. O'Dwyer、Nessa S. Mullane、Timothy P. Smyth
DOI:10.1002/jhet.550
日期:2011.3
A modular synthesis of selectively‐substituted pyrrolo[2,1‐b]thiazoles (Δ6 isomeric form) has been implemented, involving a distinctive bicyclization reaction of a mucobromic acid derivative followed by a Suzuki‐Miyaura coupling. A novel process of Δ6 to Δ7 isomerization of the pyrrolothiazole structure was uncovered that appears to involve a 1,4‐addition‐1,2‐elimination mechanism. Preparation of 1