Chemistry of aminophenols. Part 2: A general and efficient synthesis of indoles possessing a nitrogen substituent at the C4, C5, C6, and C7 positions
作者:Wei-Min Dai、Li-Ping Sun、Dian-Shun Guo
DOI:10.1016/s0040-4039(02)01851-8
日期:2002.10
efficient synthesis of indoles possessing a nitrogen substituent at the C4, C5, C6, and C7 positions has been developed. Starting from commercially available nitro 2-aminophenols, 5-, 6-, and 7-arenesulfamoylindoles were synthesized via a base-promoted ring closure of 2-alkynylanilides, reduction of the nitro group, and sulfonylation. C4 nitrogen substituted indoles were synthesized from 2-chloro-1,3-dinitrobenzene
已经开发了在C4,C5,C6和C7位置具有氮取代基的吲哚的一般有效合成方法。从可商购的硝基2-氨基苯酚开始,通过2-炔基苯胺的碱促进的闭环,硝基的还原和磺酰化来合成5-,6-和7-芳烃磺酰基吲哚。作为关键步骤,通过2-炔基-1,3-二氨基苯的环化反应,由2-氯-1,3-二硝基苯合成了C4氮取代的吲哚。