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Triethanolamine as an Efficient and Reusable Base, Ligand and Reaction Medium for Phosphane-Free Palladium-Catalyzed Heck Reactions

✍ Scribed by Hong Ji Li; Lei Wang

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
107 KB
Volume
2006
Category
Article
ISSN
1434-193X

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✦ Synopsis

Abstract

Triethanolamine was found to be an efficient and reusable base, ligand and reaction medium for phosphane‐free palladium‐catalyzed Heck reactions. The olefination of iodo‐ and bromoarenes generated the corresponding products in good to excellent yields in the presence of catalytic amounts of palladium acetate in triethanolamine without any additive. Moderate yields of the desired products were obtained with activated chloroarenes. In addition, triethanolamine could be recovered and recycled for five consecutive trials without significant loss of its reactivity. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)

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## Abstract Oxidative Heck reactions of arylboronic acids and alkenes are carried out in the presence of polyaniline‐supported palladium catalysts using air as a co‐oxidant to afford the Heck products with excellent yields and selectivities under base‐ and ligand‐free conditions. The catalyst was r