Cyclization of (+)-citronellal to (-)-isopulegol catalyzed by H3PW12O40/SiO2

被引：63

作者：

da Silva, KA

Robles-Dutenhefner, PA

Sousa, EMB

Kozhevnikova, EF

Kozhevnikov, IV

Gusevskaya, EV ^{[1
]}

机构：

[1] Univ Fed Minas Gerais, Dept Quim, BR-31270901 Belo Horizonte, MG, Brazil

[2] CNEN, CDTN, BR-30123970 Belo Horizonte, MG, Brazil

[3] Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England

来源：

CATALYSIS COMMUNICATIONS | 2004年 / 5卷 / 08期

关键词：

citronellal; isopulegol; cyclization; heteropoly acid; catalysis;

D O I：

10.1016/j.catcom.2004.05.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Silica-supported heteropoly acid H3PW12O40 (PW) is a very efficient and environmentally benign solid acid catalyst for the liquid-phase cyclization of (+)-citronellal (1). The reaction has been performed in cyclohexane solutions at 15-40 degreesC yielding (-)-isopulegol (2) and (+)-neo-isopulegol (3) as main products in almost 100% total selectivity at 95-100% conversion, with an 80% selectivity to more valuable product 2. No PW leaching is observed during the reaction, and the catalysts can be recovered and reused several times without loss of activity. Sol-gel silica-included PW catalysts have been prepared and tested in the reaction; these showed no activity, however. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：425 / 429

页数：5

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[11] Hydration and acetoxylation of dihydromyrcene catalyzed by heteropoly acid [J].