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Brønsted acidic ionic liquid as an efficient and recyclable promoter for hydroesterification of olefins catalyzed by a triphenylphosphine–palladium complex

Paper ID Volume ID Publish Year Pages File Format Full-Text
50622 46805 2010 5 PDF Available
Title
Brønsted acidic ionic liquid as an efficient and recyclable promoter for hydroesterification of olefins catalyzed by a triphenylphosphine–palladium complex
Abstract

Several Brønsted acidic ionic liquids (BAILs) with different acidic scales were synthesized and employed as acid promoters for the hydroesterification of olefins catalyzed by a triphenylphosphine–palladium complex. The results showed that catalysts with BAIL promoters resulted in moderate to high conversions to the ester product with excellent selectivity, depending on the acidity of BAIL used. The reaction conversion reached a plateau when the catalyst was promoted using BAIL with a Hammett acidity function less than or equal to − 0.11. This catalyst system could be reused several times for the hydroesterification of 1-hexene without a considerable decrease in the catalytic performance.

Graphical abstractThe hydroesterification of olefins catalyzed by a triphenylphosphine˜palladium complex can be significantly promoted by the Brønsted acidic ionic liquids (BAILs) with SO3H group, producing excellent yield of esters. Figure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights►The acidity of Brønsted acidic ionic liquids (BAILs) was influenced by the structures of both anion and cation. In particular, the presence of a SO3H group in the cation of BAIL might be responsible for a higher acidity, which brought about a significant promoting effect on the hydroesterification of olefins catalyzed by a triphenylphosphine-palladium complex. The ester yield attained a plateau when the catalyst was promoted with BAIL that had a Hammett acidity function (H0) less than or equal to -0.11. The catalyst system containing [MIMPs][TsO] BAIL, having a H0 value of -0.11, could be reused several times without considerable loss of activity for the hydroesterification of 1-hexene.

Keywords
Hydroesterification; Triphenylphosphine–palladium complex; Brønsted acidic ionic liquid; Acidity
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Brønsted acidic ionic liquid as an efficient and recyclable promoter for hydroesterification of olefins catalyzed by a triphenylphosphine–palladium complex
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 11, Issue 15, 25 September 2010, Pages 1200–1204
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us