In Situ Generation of Quinolinium Ylides from Diazo Compounds: Copper-Catalyzed Synthesis of Indolizine
作者:Rongxiang Chen、Yanwei Zhao、Hongmei Sun、Ying Shao、Yudong Xu、Meihua Ma、Liang Ma、Xiaobing Wan
DOI:10.1021/acs.joc.7b01042
日期:2017.9.15
The Cu-catalyzedthree-component reaction between quinolines, diazo compounds, and alkenes has been established for direct construction of indolizine derivatives via quinolinium ylides. This methodology is distinguished by the use of a commercially inexpensive catalyst and readily available starting materials, wide substrate scope, and operational simplicity.
A Convenient Synthesis Of 1-Acyl Indolizines by 1,3-Dipolar Cycloaddition Reactions of Pyridinium Ylides and α,β-Unsaturated Aldehydes or Ketones in the Presence of Tetrakis-Pyridine Cobalt Dichromate
作者:Xuechun Zhang、Weili Cao、Xudong Wei、Hongwen Hu
DOI:10.1080/00397919708006070
日期:1997.4
Abstract In the presence of tetrakispyridine cobaltdichromate (CoPy4(HCrO4)2), pyridinium ylides and α,β-unsaturated aldehydes or ketones undergo 1,3-dipolarcycloaddition reactions followed by in situ aromatization to give 1-acyl substituted indolizines in moderate to good yields.