Solid bases prepared by derivatisation of amorphous silica and hexagonal mesoporous silica with dimethylaminopropyl groups are good catalysts for Michael addition reactions. Of the prepared catalysts, those based on hexagonal mesoporous silica show particularly high activities. The sol-gel method used in preparing the catalysts based on hexagonal mesoporous silica enables loading to be increased to more than twice that of those based on amorphous silica which are prepared by the post-modification method.
通过用
二甲氨基丙基对无定形
二氧化硅和六方介孔
二氧化硅进行衍生化制备的固体基底,是Michael加成反应的良好催化剂。在这些制备的催化剂中,基于六方介孔
二氧化硅的催化剂显示出特别高的活性。在制备基于六方介孔
二氧化硅的催化剂过程中使用的溶胶-凝胶方法,使得载量能够增加到基于无定形
二氧化硅的催化剂的两倍以上,后者是通过后修饰方法制备的。