Synthesis of 2-, 3-, and 4-Substituted Pyrido[2,3-b]indoles by C-N, C-O, and C-C(sp) Bond Formation
作者:Cédric Schneider、David Goyard、David Gueyrard、Benoît Joseph、Peter G. Goekjian
DOI:10.1002/ejoc.201000795
日期:2010.12
The synthesis of 2-, 3-, and 4-substituted alpha-carbolines is described starting from the corresponding chloropyrido[2,3-b]-indoles by Buchwald-Hartwig and Sonogashira cross-coupling reactions. Regioselective Sonogashira reactions on 2,4-dichloropyrido[2,3-b]indoles are also presented as an efficient route to unsymmetrically 2,4-disubstituted alpha-carbolines.
通过 Buchwald-Hartwig 和 Sonogashira 交叉偶联反应,从相应的氯吡啶并 [2,3-b]-吲哚开始合成 2-、3-和 4-取代的 α-咔啉。2,4-二氯吡啶并 [2,3-b] 吲哚上的区域选择性 Sonogashira 反应也被认为是不对称 2,4-二取代 α-咔啉的有效途径。