Synthesis of 2-substituted indoles through cyclization and demethylation of 2-alkynyldimethylanilines by ethanol
作者:Guangkuan Zhao、Christelle Roudaut、Vincent Gandon、Mouad Alami、Olivier Provot
DOI:10.1039/c9gc01880h
日期:——
Herein, we demonstrated that 2-alkynyldimethylamines easily cyclize in EtOH according to a 5-endo-dig annulation into 2-substituted indoles without the aid of any additives or any metal catalysts to activate the triple bond. Thus, a variety of functionalized 2-styrylindoles, 2-arylindoles, 2-alkynylindoles, and 2-alkylindoles were prepared in high to excellent yields according to an environmentally
在此,我们证明2-炔基二甲基胺根据5-内挖-环化成2-取代的吲哚,很容易在EtOH中环化,而无需任何添加剂或任何金属催化剂来激活三键。因此,根据环境友好的方案,以高至优异的产率制备了各种官能化的2-苯乙烯基吲哚,2-芳基吲哚,2-炔基吲哚和2-烷基吲哚。已经探索了该机理以更好地理解这种对2-取代的吲哚的生态友好途径,并且DFT计算合理化了溶剂在该N-环化/脱烷基化过程中的作用。