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Heteropoly acid catalysts in the valorization of the essential oils: Acetoxylation of β-caryophyllene

Paper ID Volume ID Publish Year Pages File Format Full-Text
42140 45912 2010 8 PDF Available
Title
Heteropoly acid catalysts in the valorization of the essential oils: Acetoxylation of β-caryophyllene
Abstract

H3PW12O40 (PW), the strongest heteropoly acid in the Keggin series, is an active and environmentally friendly catalyst for the liquid-phase conversion of β-caryophyllene (1) to β-caryolanyl acetate (2) in homogeneous and heterogeneous systems. An efficient and clean method for the synthesis of 2, providing a mixture containing two stereoisomeric β-caryolanyl acetates 2a and 2b, 2a/2b = 80/20 mol/mol, with 100% GC yield, has been developed using PW as a homogeneous catalyst under mild reaction conditions. The reaction occurs at 25 °C with a catalyst turnover number of 2000. The catalyst can be recovered without neutralization and reused without loss of activity and selectivity.

Graphical abstractH3PW12O40 (PW), the strongest heteropoly acid in the Keggin series, is an active and environmentally friendly catalyst for the liquid-phase conversion of one of the most abundant sesquiterpenes, i.e., β-caryophyllene (1), to β-caryolanyl acetate (2), which is a potentially valuable fragrance compound, in up to 100% GC yield.Figure optionsDownload full-size imageDownload high-quality image (42 K)Download as PowerPoint slide

Keywords
Acetoxylation; β-Caryophyllene; Acid catalysis; Heteropoly acid
First Page Preview
Heteropoly acid catalysts in the valorization of the essential oils: Acetoxylation of β-caryophyllene
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 374, Issues 1–2, 1 February 2010, Pages 87–94
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis