Lanthanum oxide（La2O3） in combination with 2,2,2-trifluoroethanol（TFE） was found to be an efficient system for the one-pot, four-component synthesis of Hantzsch polyhydroquinoline derivatives from aromatic aldehyd...Lanthanum oxide（La2O3） in combination with 2,2,2-trifluoroethanol（TFE） was found to be an efficient system for the one-pot, four-component synthesis of Hantzsch polyhydroquinoline derivatives from aromatic aldehydes, dimedone, ethyl acetoacetate and ammonium acetate at ambient temperature. The catalyst is heterogeneous and reusable, hence can be separated easily and reused. The present method is featured by mild reaction conditions, use of heterogeneous catalyst, non-chromatographic purification,short reaction time and high yields, which make it an attractive route for the synthesis of polyhydroquinolines.展开更多
基金University Grants Commission for Financial assistance under a Minor Research Project [No. 47-283/12(WRO)]
文摘Lanthanum oxide（La2O3） in combination with 2,2,2-trifluoroethanol（TFE） was found to be an efficient system for the one-pot, four-component synthesis of Hantzsch polyhydroquinoline derivatives from aromatic aldehydes, dimedone, ethyl acetoacetate and ammonium acetate at ambient temperature. The catalyst is heterogeneous and reusable, hence can be separated easily and reused. The present method is featured by mild reaction conditions, use of heterogeneous catalyst, non-chromatographic purification,short reaction time and high yields, which make it an attractive route for the synthesis of polyhydroquinolines.
