Iodine(III) Reagent-Mediated Intramolecular Amination of 2-Alkenylanilines to Prepare Indoles
作者:Chun-Yang Zhao、Kun Li、Yu Pang、Jia-Qing Li、Cui Liang、Gui-Fa Su、Dong-Liang Mo
DOI:10.1002/adsc.201701551
日期:2018.5.16
A variety of 3‐substituted and 2,3‐disubstituted indoles were synthesized efficiently in good yields through the intramolecular amination of 2‐alkenylanilines promoted by readily available iodine(III) reagents in a short reaction time. Mechanistic studies showed that the reaction pathway went through a nitrenium ion and that 3‐acetoxy indoline was the key intermediate in the indole formation. The indole
通过在很短的反应时间内即可获得的碘(III)试剂促进的2-烯基苯胺的分子内胺化反应,可以高收率高效合成各种3-取代和2,3-二取代的吲哚。机理研究表明,反应路径通过一个氮离子,3-乙酰氧基吲哚是吲哚形成的关键中间体。吲哚产物很容易以克为单位制备,并且在m CPBA存在下,使用催化的3,5-二甲基苯基碘也可以顺利进行胺化反应。此外,吲哚并[3,2-a]咔唑支架的制备要比市售邻碘碘苯胺分6步高收率。