New route synthesis of indolizines via 1,3-dipolar cycloaddition of pyridiniums and alkynes
作者:Yongjia Shang、Min Zhang、Shuyan Yu、Kai Ju、Cuie Wang、Xinwei He
DOI:10.1016/j.tetlet.2009.09.143
日期:2009.12
convenient synthesis of 2,3-di and 1,2,3-trisubstituted indolizines has been achieved via a 1,3-dipolar cycloaddition of pyridiniums and alkynes. Various alkynes and diynes were used instead of dimethyl acetylenedicarboxylate (DMAD) and its analogues in the traditional method. The corresponding 1,2,3-trisubstituted indolizines are useful building blocks for the construction of complex indolizine derivatives