Copper(II)-Catalyzed Indolizines Formation Followed by Dehydrogenative Functionalization Cascade to Synthesize 1-Bromoindolizines
作者:Fuyao Wang、Yongmiao Shen、Huayou Hu、Xiangshan Wang、Hui Wu、Yun Liu
DOI:10.1021/jo501626b
日期:2014.10.17
one-pot, three-component cascade reaction between pyridine, α-acylmethylbromide, and maleic anhydride leading to direct access of 1-bromoindolizines in high yields has been developed. This protocol is accomplished via a reaction sequence of 1,3-dipolarcycloaddition of the pyridiniumylide with maleic anhydride, oxidative decarboxylation of the primary cycloadduct, and dehydrogenative bromination of