Selective Synthesis of <i>N</i>-Unsubstituted and <i>N</i>-Arylindoles by the Reaction of Arynes with Azirines
作者:Manikandan Thangaraj、Sachin Suresh Bhojgude、Shailja Jain、Rajesh G. Gonnade、Akkattu T. Biju
DOI:10.1021/acs.joc.6b01472
日期:2016.9.16
transition-metal-free and temperature-dependent highly selective reaction of arynes with 2H-azirines allowing the synthesis of either N-unsubstituted or N-arylindoles has been developed. At 60 °C, arynes generated from 2-(trimethylsilyl)aryl triflates smoothly insert into 2H-azirines to form 2,3-diarylindoles with high selectivity. Interestingly, when the reaction was performed at −10 °C, the selectivity was switched
已开发了无过渡金属且温度依赖性的芳烃与2个H-叠氮基的高度选择性反应,可合成N-未取代或N-芳基吲哚。在60°C下,由2-(三甲基甲硅烷基)芳基三氟甲磺酸酯生成的芳烃平稳地插入2 H-叠氮基,形成高选择性的2,3-二芳基吲哚。有趣的是,当反应在-10℃下进行时,选择性以高收率切换成1,2,3-三芳基吲哚的形成。