One-Pot Synthesis of Pyrrolo[3,4-<i>a</i>]indolizine-1,3-diones through [3+2] Cycloaddition-Oxidation Reaction Catalyzed by Cu<sup>II</sup>Salt and O<sub>2</sub>as the Oxidant
作者:Yun Liu、Hua-You Hu、Xian-Bin Su、Jin-Wei Sun、Chang-Sheng Cao、Yan-Hui Shi
DOI:10.1002/ejoc.201201488
日期:2013.4
An efficient one-pot synthesis of pyrrolo[3,4-a]indolizine-1,3-diones has been developed from maleimides, pyridines, and acyl bromides through a [3+2] cyclization–oxidation reaction catalyzed by CuII salt under O2 atmosphere. The advantage of this method is the use of molecular oxygen as the oxidant, in the presence of a catalytic amount of hydrated copper(II) chloride, to accomplish the reaction with