Fourteen 1,2,3-triaroylindolizines were prepared conveniently by oxidation of corresponding N-aracyl pyridinium or substituted pyridinium bromides with a versatile oxidant TPCD [(Py4Co(HCrO4)2, tetrakis-pyridino-cobalt (II) dichromate] in 12-42 % yields.
A highly efficient method for the synthesis of 1,2,3-triaroylindolizines has been established from readily available methyl ketones and pyridines in the presence of iodine. This reaction also examplified the self-division of labor strategy in convergent domino synthesis. (C) 2012 Elsevier Ltd. All rights reserved.
One-pot multicomponent synthesis of polysubstituted indolizines
作者:Zhenjun Mao、Xuejian Li、Xufeng Lin、Ping Lu、Yanguang Wang
DOI:10.1016/j.tet.2011.10.083
日期:2012.1
Concise and efficient four-component tandem approaches to polysubstituted indolizines have been developed under metal-free and mild aerobic conditions in refluxing acetonitrile. The mechanism of the novel reactions was proposed involving the formation of pyridinium ylides and alpha,beta-unsaturated ketones with subsequent 1,3-dipolar cycloaddition and aromatization reaction. (C) 2011 Elsevier Ltd. All rights reserved.
A Facile Preparation of 1,2,3-Triaroylindolizines
作者:Xudong Wei、Yuefei Hu、Tingsheng Li、Hongwen Hu
DOI:10.1080/00397919208021344
日期:1992.7
Fourteen 1,2,3-triaroylindolizines were prepared conveniently by oxidation of corresponding N-aracyl pyridinium or substituted pyridinium bromides with a versatile oxidant TPCD [(Py4Co(HCrO4)2, tetrakis-pyridino-cobalt (II) dichromate] in 12-42 % yields.