Chloroacetate Promotes and Participates in the Oxidative Annulation of Pyridines/Isoquinoline by Using Oxygen as the Oxidant
作者:Yuanyuan Yue、Yangyang Sun、Shufang Zhao、Xuyang Yan、Rong Li、Yaru Shi、Kelei Zhuo、Jianming Liu
DOI:10.1002/asia.201601233
日期:2016.12.6
The aerobic oxidative annulation of chalcones, pyridines/isoquinoline and ethyl chloroacetate to indolizines was achieved by cascade reaction. Variousfunctionalgroups on chalcones were tolerated. And different pyridines derivatives could also be suitable substrates. Ethyl chloroacetate is an essential component in participating of the oxidative annulation process. Overall, this protocol is very practical
A Novel Coupling 1,3-Dipolar Cycloaddition Sequence as a Three-Component Approach to Highly Fluorescent Indolizines
作者:Alexandru V. Rotaru、Ioan D. Druta、Thomas Oeser、Thomas J. J. Müller
DOI:10.1002/hlca.200590141
日期:2005.7
Indolizines 4 and biindolizines 6 can be synthesized in moderate yields in a consecutive one-pot three-component process by a coupling/1,3-dipolar cycloadditionsequence of a (hetero)arenecarbonyl chloride 1, a terminal alkyne 2, and a suitable 1-(2-oxoethyl) pyridinium bromide 3 or 5, respectively (Schemes 1 and 2). After the Sonogashira coupling, a [2+3] cycloaddition of the in situ formed pyridinium