The reaction of anilines bearing a benzylic activating group in the ortho position with aromatic aldehydes or α,β-unsaturated aldehydes results in an efficient synthetic route to substituted indoles.
Synthesis of 3-Cyano-1<i>H</i>-indoles and Their 2′-Deoxyribonucleoside Derivatives through One-Pot Cascade Reactions
作者:Bin Li、Beibei Zhang、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.6b01612
日期:2016.10.21
An efficient and economical synthetic approach toward 3-cyano-1H-indoles through the reactions of 2-(2-bromophenyl)acetonitriles with aldehydes and aqueous ammonia is presented. Mechanically, this novel protocol involves a one-pot cascade procedure consisting of an aldol-type condensation, a copper-catalyzed amination by using aqueous ammonia as a cheap and safe nitrogen source, and an intramolecular
Selective Access to 3-Cyano-1<i>H</i>-indoles, 9<i>H</i>-Pyrimido[4,5-<i>b</i>]indoles, or 9<i>H</i>-Pyrido[2,3-<i>b</i>]indoles through Copper-Catalyzed One-Pot Multicomponent Cascade Reactions
作者:Bin Li、Shenghai Guo、Ju Zhang、Xinying Zhang、Xuesen Fan
DOI:10.1021/acs.joc.5b00239
日期:2015.6.5
Novel and selective synthetic approaches toward indole derivatives via copper-catalyzedone-pot multicomponent cascade reactions of 1-bromo-2-(2,2-dibromovinyl)benzenes with aldehydes and aqueous ammonia are presented. Intriguingly, the concentration of ammonia, the molar ratio of reagents, and the structural features of the aldehyde substrate serve as key factors in controlling the selective formation