Highly Selective Aldol Condensation Using Amine‐functionalized SiO
<sub>2</sub>
‐Al
<sub>2</sub>
O
<sub>3</sub>
Mixed‐oxide under Solvent‐free Condition
作者:Alireza Abbaspourrad、Roozbeh Javad Kalbasi、Farzad Zamani
DOI:10.1002/cjoc.201090346
日期:2010.10
of amine catalysts supported on mesoporous molecular sieves SiO2/Al2O3 with trimethoxysilylpropylamine [(CH3O)3Si(CH2)3NH2] loading varying from 3 mmol to 6 mmol were synthesized by impregnation method. The aldol condensation of various aromatic aldehydes and 1‐heptanal was used to test the acid‐base cooperativity of amine‐functionalized SiO2/Al2O3. The effects of solvent, reaction temperature, benzaldehyde
通过浸渍法合成了负载在介孔分子筛SiO 2 / Al 2 O 3上的三甲氧基甲硅烷基丙胺[(CH 3 O)3 Si(CH 2)3 NH 2 ]负载的一系列胺催化剂。各种芳香醛和1-庚醛的醛醇缩合用于测试胺官能化SiO 2 / Al 2 O 3的酸碱协同作用。溶剂,反应温度,苯甲醛与1-庚醛摩尔比,不同载体(SiO 2,Al 2 O 3和SiO 2 -Al 2 O 3),催化剂用量和催化剂的可回收性进行了研究。负载了5 mmol胺的样品显示最高的苯甲醛转化率(100%)和对茉莉醛的选择性(97%)。