Aminolysis of epoxides catalyzed by three-dimensional, mesoporous titanosilicates, Ti-SBA-12 and Ti-SBA-16
作者:Anuj Kumar、Darbha Srinivas
DOI:10.1016/j.jcat.2012.06.012
日期:2012.9
solid catalysts for the synthesis of a range of β-amino alcohols in high yields and selectivity through ring-opening of epoxides with amines at ambient and solvent-free conditions is reported, for the first time. These mesoporous titanosilicates (Si/Ti = 20–80) were prepared by a direct hydrothermal synthesis route adjusting the concentration of HCl (0.05–2 M) used in the synthesis. Ti ions in these catalysts
三维中孔钛硅酸盐(Ti-SBA-12和Ti-SBA-16)作为可重复使用的固体催化剂的应用,可通过高产率和高选择性通过环氧化物与环戊烷的开环反应合成一系列β-氨基醇首次报道了在环境和无溶剂条件下的胺。这些介孔钛硅酸盐(Si / Ti = 20–80)是通过直接水热合成路线来调节合成中使用的HCl(0.05–2 M)的浓度而制备的。这些催化剂中的Ti离子在骨架中大部分被Si取代。吸水率和29Si魔角自旋核磁共振波谱表明,Ti-SBA-16比Ti-SBA-12具有更大的疏水性。与Ti-SBA-12和迄今已知的固体催化剂相比,介孔,三维结构,表面疏水性和路易斯酸性,被骨架取代的Ti位点易于接近是造成Ti-SBA-16优越活性的因素。反应。