Recyclable Sulfonated Amorphous Carbon Catalyzed Friedel-Crafts Alkylation of Indoles with α,β-Unsaturated Carbonyl Compounds in Water
作者:Jimei Ma、Simon Ng、Youjun Yong、Xiao-Zhou Luo、Xin Wang、Xue-Wei Liu
DOI:10.1002/asia.200900726
日期:2010.4.1
Green practice: A sulfonatedamorphouscarbon‐based solid acid derived from D‐glucose was synthesized. It was explored for its catalytic efficiency in Friedel–Crafts reactions of indoles with various α,β‐unsaturated carbonylcompounds in H2O or H2O/THF at room temperature. Moderate to excellent yields (67–96 %) were afforded. The catalyst could be recycled up to five times without any significant loss
绿色实践:衍生自D葡萄糖的磺化无定形碳基固体酸。探索了它在室温下在H 2 O或H 2 O / THF中吲哚与各种α,β-不饱和羰基化合物的吲哚的Friedel-Crafts反应中的催化效率。可提供中等至极好的收率(67–96%)。催化剂可以循环使用多达五次,而催化活性没有任何重大损失。
Metal halide hydrates as lewis acid catalysts for the conjugated friedel-crafts reactions of indoles and activated olefins
作者:Cristiane S. Schwalm、Marco Antonio Ceschi、Dennis Russowsky
DOI:10.1590/s0103-50532011000400003
日期:——
CrCl2·6H2O, CoCl2·6H2O e CeCl3·7H2O were investigated as mild Lewisacidscatalysts for the conjugate Friedel-Craftsreaction between indoles and activated olefins. The reactions were carried out with aliphatic unsaturated ketones over a period of days at room temperature, while chalcones reacted only under reflux conditions. The reactions with nitrostyrenes were either performed in solvent or under