Organic amine grafting on mesoporous silica as a hybrid catalyst for heterogeneous three-component one-pot reaction
作者:Kenichi Komura、Yuta Mishima、Mamoru Koketsu
DOI:10.1016/j.apcata.2012.08.009
日期:2012.11
organic–inorganic hybrid catalyst was prepared by immobilizing 3-methylaminopropyl moiety onto mesoporous silica, MCM-41, and applied for solid base catalyst of three-component one-pot reaction, i.e. Knoevenagel condensation of aldehyde with the active methylene compound to yield an electron deficient alkene which is subjective to be reacted with nitromethane by Michael addition to form tri-substituted
有机-无机杂化催化剂是通过将3-甲基氨基丙基部分固定在介孔二氧化硅MCM-41上制备的,并用于三组分一锅法反应的固体基础催化剂,即醛与活性亚甲基化合物的Knoevenagel缩合反应得到电子不足的烯烃,其易于通过迈克尔加成与硝基甲烷反应形成三取代的伯硝基化合物。通过粉末XRD,TG-DTA,FT-IR,氮吸附-脱附测量和固态交叉极化幻角旋转(CP / MAS)NMR表征该催化剂,并在三组分一锅法中表现出高催化活性。反应; 但是,可重用性较差。