Volume 24, Issue 10 pp. 1309-1314
Full Paper

Ethylenediamine-Functionalized Resin-Supported Pd(0) Complex: An Effective and Recyclable Catalyst for Heck Vinylation

Yuan-Fa Yang

Yuan-Fa Yang

Fax: 0086-579-2282595; Tel.: 0086-579-2282234

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Ming Zhuang

Ming Zhuang

Zhejiang Normal University, Jinhua, Zhejiang 321004, China

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Chao-Xia Zeng

Chao-Xia Zeng

Institute of Physical Chemistry, Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Zhejiang Normal University, Jinhua, Zhejiang 321004, China

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Chao-Biao Huang

Chao-Biao Huang

Zhejiang Normal University, Jinhua, Zhejiang 321004, China

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Meng-Fei Luo

Meng-Fei Luo

Institute of Physical Chemistry, Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Zhejiang Normal University, Jinhua, Zhejiang 321004, China

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First published: 02 October 2006
Citations: 13

Abstract

The ethylenediamine-functionalized resin-supported Pd(0) complex was prepared from PdCl2 and ethylenediamine-functionalized chloromethylated polystyrene, followed by reduction with KBH4. The complex was characterized by FT-IR, XRD, BET, SEM and EDS. The resin-supported catalyst exhibited high catalytic activity in the Heck reaction and could be reused up to 17 times in NMP or 16 times in DMF at 90 °C in the Heck reaction of iodobenzene with acrylic acid. The leaching investigation disclosed that the palladium leaching was caused by the interaction of iodobenzene with the metal Pd(0) on supported catalyst. The leached palladium species in filtrate was very stable and could be reused five times after the solid catalyst was filtered off. A cross-transfer test in recycling in the presence of additional carbon disclosed that the soluble leached palladium species had much higher catalytic activity than supported and/or adsorbed palladium in solid-solution heterogeneous Heck reaction.

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