External Oxidant‐Free Oxidative Tandem Cyclization: NaI‐Catalyzed Thiolation for the Synthesis of 3‐Thiosubstituted Pyrroles
作者:Bingxiang Yuan、Yong Jiang、Zhenjie Qi、Xin Guan、Ting Wang、Rulong Yan
DOI:10.1002/adsc.201900620
日期:2019.11.19
A simple method for the synthesis of 3‐thiosubstituted pyrroles from homopropargylic amines and thiosulfonates via a tandem sulfenylation/cyclization has been developed. The thiosulfonates are used both as substrates and oxidants in this transformation. This procedure exhibits good functional group tolerance and a series of 3‐thiosubstituted pyrrole derivatives are obtained in moderate to good yields
Imidazolium salts, intermediates thereto and their use
申请人:SCHERING AKTIENGESELLSCHAFT
公开号:EP0131302A2
公开(公告)日:1985-01-16
The imidazolium salts described are useful as antiarrhythmic agents. A method of treating arrhythmia by increasing the refractoriness of cardiac tissue is provided as well as pharmaceutical formulations containing such imidazolium salts.
I2-catalyzed synthesis of 3-aminopyrrole with homopropargylic amines and nitrosoarenes
作者:Jiaze Qin、Shixuan Jiang、Xiaofeng Luo、Tianqiang Wang、Peihua Liu、Bingxiang Yuan、Rulong Yan
DOI:10.1039/d4cc00482e
日期:——
amination reagent nitrosoarenes and homopropargylic amines catalyzed by I2 through cyclization and amination has been developed. This protocol features excellent functional group tolerance and mild reaction conditions, yielding 3-aminopyrroles in moderate to good yields without a metal catalyst. This method realizes the construction and amination of the 3-aminopyrroles in which nitrosoarenes serve as the
开发了使用胺化试剂亚硝基芳烃和均炔丙胺在 I 2催化下通过环化和胺化合成 3-氨基吡咯的方法。该方案具有优异的官能团耐受性和温和的反应条件,无需金属催化剂即可以中等至良好的产率产生 3-氨基吡咯。该方法以亚硝基芳烃为胺源和氧化剂,实现了3-氨基吡咯的构建和胺化。
Synthesis of 2,3-Dihydroselenophene and Selenophene Derivatives by Electrophilic Cyclization of Homopropargyl Selenides
作者:Ricardo F. Schumacher、Alisson R. Rosário、Ana Cristina G. Souza、Paulo H. Menezes、Gilson Zeni
DOI:10.1021/ol1003753
日期:2010.5.7
The synthesis of several highly functionalized 2,3-dihydroselenophenes from homopropargyl selenides via electrophilic cyclization is described. Electrophiles such as 12, ICI, and PhSeBr were used in a simple process employing CH2Cl2 as solvent at room temperature, which gave the cyclized products in high yields. 4-lodo-2,3-dihydroselenophenes obtained by this methodology were submitted to a dehydrogenation reaction using 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) to give 3-iodoselenophenes. 4-lodo-5-phenyl-2,3-dihydroselenophene was also submitted to the thiol copper-catalyzed and Heck-type reactions giving the desired products under mild reaction conditions.