A new, alternative, halogen-free synthesis for the fragrance compound Melonal using zeolites and mesoporous materials as oxidation catalysts

被引：39

作者：

Corma, A ^{[1
]}

Iborra, S ^{[1
]}

Mifsud, M ^{[1
]}

Renz, M ^{[1
]}

机构：

[1] Univ Politecn Valencia, CSIC, Inst Tecnol Quim, Valencia 46022, Spain

来源：

JOURNAL OF CATALYSIS | 2005年 / 234卷 / 01期

关键词：

Baeyer-Villiger oxidation; citral; melonal; solid Lewis acid; tin centre;

D O I：

10.1016/j.jcat.2005.06.006

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：

At present Melonal (2,6-dimethyl-5-hepten-1-al) fragrance is industrially produced by a Darzens reaction from 6-methyl-5-hepten-2-one, with ethylchloroacetate as reagent. We present here a novel halogen-free synthesis strategy that involves the chemoselective oxidation of Citral (3,7-dimethyl-6-octen-1-al), a common compound in the fragrance industry, with H(2)O(2) and Sn-Beta or Sn-MCM-41 as catalysts. The performance of tin Lewis acid sites is compared with other potential catalytic sites, and it is found that aluminium Bronsted acid sites and zirconium or titanium Lewis acid sites are less efficient and selective than Sn. In the case of Ti, epoxidation by-products could be found. The re-usability of Sn-Beta zeolite is discussed, as is the heterogeneity of the reaction. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：96 / 100

页数：5

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