Friedel–Crafts acylation of indoles in acidic imidazolium chloroaluminate ionic liquid at room temperature
作者:Kap-Sun Yeung、Michelle E Farkas、Zhilei Qiu、Zhong Yang
DOI:10.1016/s0040-4039(02)01185-1
日期:2002.8
A practical and convenient protocol has been developed for the acidic 1-ethyl-3-methylimidazolium chloroaluminate ionic liquid (generated from 1-ethyl-3-methylimidazolium chloride (EmimCl) and aluminium chloride (X(AlCl3), mole fraction X=0.67–0.75) promoted Friedel–Crafts acylation of indoles at room temperature. The simple experimental procedure provides 3-substituted indoles in good to high yields