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-catalyzed one-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
提出了通过铜催化的1-溴-2-(2,2-二溴乙烯基)苯与醛和氨水的一锅多组分级联反应制备吲哚衍生物的新颖和选择性的合成方法。有趣的是,氨的浓度,试剂的摩尔比和醛底物的结构特征是控制3-氰基-1 H-吲哚,9 H-嘧啶[4,5- b]选择性形成的关键因素。]吲哚或9 H-吡啶并[2,3- b]吲哚。与文献方法相比,本文报道的合成方法具有诸如容易获得的起始原料,温和的反应条件和朝向具有易于调节的选择性的不同产物的发散反应模式的优点。