提出了通过Rh(III)催化2-芳基吲哚与sulf基ox的级联反应,对不同取代的苯并[ a ]咔唑和吲哚并[ 2,1- a ]-异喹啉进行高度化学和区域选择性的合成。具体而言,在Rh(III)的催化下,用亚砜亚砜处理2-芳基吲哚,2-芳基吲哚-3-甲醛,2-芳基吲哚-3-腈或2-芳基-3-甲基吲哚导致选择性地形成6 -芳基/烷基苯并[一个]咔唑,5- acylbenzo [一个]咔唑,6-氨基-5- acylbenzo [一个]咔唑或12 methylindolo [2,1-一个分别是]异喹啉。从机理上讲,标题化合物的形成涉及级联过程,包括惰性C(sp 2)-H键的金属化,通过原位类胡萝卜素的形成将叶立德迁移插入碳-金属键,原金属脱金属和缩合。据我们所知,这是第一个将β-羰基sulf代亚砜用作稳定的卡宾前体和双官能C2合成子以提供苯并[ a ]咔唑和吲哚[2,1- a ]异喹啉的实例。
Copper-Mediated Cyclization−Halogenation and Cyclization−Cyanation Reactions of β-Hydroxyalkynes and <i>o</i>-Alkynylphenols and Anilines
作者:Nalivela Kumara Swamy、Arife Yazici、Stephen G. Pyne
DOI:10.1021/jo1005119
日期:2010.5.21
The CuX (X = I, Br, Cl, CN)-mediated cyclization−halogenation and cyclization−cyanation reactions of β-hydroxyalkynes and o-alkynylphenol and -aniline derivatives give rise to 3-halo- and 3-cyanofuro[3,2-b]pyrroles, 3-iodo-, 3-bromo-, and 3-cyanobenzofurans, and 3-cyanoindoles, respectively.
CuX(X = I,Br,Cl,CN)介导的β-羟基炔烃与邻炔基苯酚和-苯胺衍生物的环化-卤化和环化-氰化反应生成3-卤代和3-氰基呋喃[3,2 - b ]吡咯,3-碘,3-溴-和3- cyanobenzofurans和3- cyanoindoles,分别。
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