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 Lewis acids catalysts for the conjugate Friedel-Crafts reaction 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
研究了金属卤化物水合物如SnCl2·2H2O,MnCl2·4H2O,SrCl2·6H2O,CrCl2·6H2O,CoCl2·6H2O和CeCl3·7H2O作为温和的路易斯酸催化剂,用于吲哚和活性烯烃之间的共轭Friedel-Crafts反应。反应在室温下用脂族不饱和酮在几天内进行,而查耳酮仅在回流条件下反应。与硝基苯乙烯的反应在溶剂中或在无溶剂条件下进行。在所有情况下,均获得了合理至良好的产量。