A green and convenient approach for the one-pot solvent-free synthesis of coumarins and β-amino carbonyl compounds using Lewis acid grafted sulfonated carbon@titania composite
作者:Manmeet Kour、Satya Paul
DOI:10.1007/s00706-016-1752-4
日期:2017.2
synthesis of coumarins via Pechmann reaction, and β-amino carbonyl compounds via aza-Michael reaction using catalytic amount of solid Lewis acid catalyst, C@TiO2–SO3–SbCl2. Six different catalysts were prepared by covalent immobilization of homogeneous Lewis acids onto sulfonated carbon@titania composite derived from amorphous carbon and nano-titania. Among various catalysts tested, C@TiO2–SO3–SbCl2
摘要本文报道了使用催化量的固体路易斯酸催化剂C @ TiO 2 -SO 3 -SbCl 2通过Pechmann反应合成香豆素和通过aza-Michael反应合成β-氨基羰基化合物的有效方案。通过将均相的路易斯酸共价固定在衍生自无定形碳和纳米二氧化钛的磺化碳二氧化钛复合材料上,制备了六种不同的催化剂。在测试的各种催化剂中,C @ TiO 2 -SO 3 -SbCl 2显示出优异的催化活性。该催化剂可以循环使用,而不会显着降低其催化活性,并已证明对多种底物均具有广泛的催化作用。 图形概要