Imidazolethiones: novel and efficient organocatalysts for asymmetric Friedel–Crafts alkylation
作者:Xianrui Liang、Jiaoyang Fan、Fei Shi、Weike Su
DOI:10.1016/j.tetlet.2010.02.160
日期:2010.5
Imidazolethiones organocatalyzed the asymmetric Friedel-Crafts alkylation of pyrroles with alpha,beta-unsaturated aldehydes was achieved to afford the corresponding adducts in moderate to good yields and good to excellent enantioselectivities. The possible mechanism was proposed. (C) 2010 Elsevier Ltd. All rights reserved.
Highly stereoselective imidazolethiones mediated Friedel–Crafts alkylation of indole derivatives
作者:Xianrui Liang、Shuangmin Li、Weike Su
DOI:10.1016/j.tetlet.2011.11.007
日期:2012.1
The asymmetricFriedel–Craftsalkylation of indoles with α,β-unsaturatedaldehydes was promoted by the novel imidazolethiones to afford the corresponding adducts in moderate to excellent yields and high enantioselectivities under mild reaction conditions.