Enantioselective Epoxypyrrolidines via a Tandem Cycloaddition/Autoxidation in Air and Mechanistic Studies
作者:Kaixiu Luo、Yongqiang Zhao、Jiawei Zhang、Jia He、Rong Huang、Shengjiao Yan、Jun Lin、Yi Jin
DOI:10.1021/acs.orglett.8b03605
日期:2019.1.18
A tandem cycloaddition/autoxidation reaction between heterocyclic ketene aminals and diazoester in air is described for the enantioselective preparation of epoxypyrrolidines. Notably, the results of mechanistic studies suggest that epoxide was oxidized from an sp3 C–C single bond, which is of mechanistic and practical interest as this protocol may be suitable for constructing other bioactive heterocyclic
Three-component domino reaction synthesis of highly functionalized bicyclic pyrrole derivatives
作者:Xue-Bing Chen、Xiao-Ying Wang、Dan-Dan Zhu、Sheng-Jiao Yan、Jun Lin
DOI:10.1016/j.tet.2013.12.062
日期:2014.2
synthesis of highly functionalized bicyclic pyrrole derivatives by a three-componentdominoreaction of heterocyclic ketene aminals (HKAs), arylglyoxal monohydrate, and indoles in ethanol medium catalyzed by acetic acid is described. In this procedure, three sigma bonds were formed simultaneously. The present synthesis features excellent regio-selectivity, easy purification as well as simple starting materials
Three-component solvent-free synthesis of fluorine substituted bicyclic pyridines
作者:Dan-Dan Zhu、Xue-Bing Chen、Rong Huang、Sheng-Jiao Yan、Jun Lin
DOI:10.1016/j.tet.2015.03.006
日期:2015.4
A concise and efficient one-pot three-component synthesis of structurally diverse fluorine substituted bicyclic pyridines was constructed by simply refluxing a mixture of different types of heterocyclic ketene aminals, triethoxymethane, and fluorine-containing methylene compounds under solvent-free and catalyst-free conditions. These bicyclic pyridines are promising candidates for drug discovery; consequently, a library of fluorine substituted bicyclic pyridines was rapidly constructed in 79%-93% yields. (C) 2015 Elsevier Ltd. All rights reserved.