A Sonogashira coupling–1,3-dipolar cycloaddition sequence of a (hetero)arenecarbonyl chloride 1, a terminal alkyne 2, and a suitable quinolinium bromide 3 or isoquinolinium bromide 4 was carried out in ionic liquid on the basis of a consecutive one-pot three-component process. Optimization of ionic liquid and recycling of the catalyst were discussed.
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