New efficient access to thieno[3,2-b]pyridine derivatives via regioselective lithiation of 3-methylthiopyridine
摘要:
The synthesis of thieno[3,2-b]pyridines was achieved using a three-step process allowing the construction of the thiophenic ring with 17-34% overall yields. The key step was the regioselective lithiation-bromination of the 3-methylthiopyridine induced by BuLi-LiDMAE superbase followed by Sonogashira coupling and halogenocyclization producing the fused heterocycles. (c) 2006 Elsevier Ltd. All rights reserved.
New efficient access to thieno[3,2-b]pyridine derivatives via regioselective lithiation of 3-methylthiopyridine
作者:Corinne Comoy、Estelle Banaszak、Yves Fort
DOI:10.1016/j.tet.2006.04.008
日期:2006.6
The synthesis of thieno[3,2-b]pyridines was achieved using a three-step process allowing the construction of the thiophenic ring with 17-34% overall yields. The key step was the regioselective lithiation-bromination of the 3-methylthiopyridine induced by BuLi-LiDMAE superbase followed by Sonogashira coupling and halogenocyclization producing the fused heterocycles. (c) 2006 Elsevier Ltd. All rights reserved.