Condensation of aldehydes for environmentally friendly synthesis of 2-methyl-3-phenyl-propanal by heterogeneous catalysis

被引：47

作者：

Tichit, D ^{[1
]}

Coq, B ^{[1
]}

Cerneaux, S ^{[1
]}

Durand, R ^{[1
]}

机构：

[1] Ecole Natl Super Chim Montpellier, CNRS UMR 5618, Lab Mat & Catal Chim Organ, F-34296 Montpellier 5, France

来源：

CATALYSIS TODAY | 2002年 / 75卷 / 1-4期

关键词：

2-methyl-3-phenyl-propanal; one-pot" synthesis; hydrotalcite; palladium;

D O I：

10.1016/S0920-5861(02)00069-X

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Eco-friendly synthesis in "one-pot" of 2-methyl-3-phenyl-propanal from benzaldehyde and propanal was studied using a multifunctional catalyst as an alternative to the three-step conventional process involving basic, acidic and hydrogenating catalysts. Mg(Al)O mixed oxides obtained from hydrotalcite precursor achieved the two first steps of condensation and dehydration. Addition of water to the solvent improves the activities and selectivities of Mg(Al)O, thanks to the reconstruction of the lamellar structure with OH- as compensating anions, acting as Bronsted basic sites. Mg(Al)O was then used as support for a multifunctional catalyst impregnated with Pd. Pd/Mg(Al)O led to 45% dihydrocinnamaldehyde selectivity at 43% conversion in benzaldehyde in the "one-pot" process. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：197 / 202

页数：6

共 16 条

[1] One-step synthesis of methyl isobutyl ketone from acetone with calcined Mg/Al hydrotalcite-supported palladium or nickel catalysts [J].