One-Pot Synthesis of Polysubstituted Indolizines by an Addition/Cycloaromatization Sequence
摘要:
Indolizines carrying various substituents in positions 5-8 were obtained from readily available 2-(1H-pyrrol-1-yl)nitriles and alpha,beta-unsaturated ketones or aldehydes in a one-pot procedure. Michael addition of the deprotonatecl aminonitriles to the acceptors followed by acid catalyzed electrophilic cyclization produces 5,6-dihydroindolizine-5-carbonitriles. From these stable intermediates, substituted indolizines were obtained via base induced dehydrocyanation.
Synthesis of functionalized indolizines via gold(<scp>i</scp>)-catalyzed intramolecular hydroarylation/aromatization of pyrrole-ynes
作者:Xiangdong Li、Jidong Zhao、Xin Xie、Yuanhong Liu
DOI:10.1039/c7ob02102j
日期:——
straightforward route to functionalized indolizines through the construction of the pyridine ring of indolizines and also allows elaboration of its pyrrole moiety with or without functional groups. In addition, a wide variety of functional groups, such as aryl, alkenyl, alkynyl, pyridyl or thienyl groups, can be easily incorporated into the pyridine unit of the indolizine products under mild conditions. The