Guanidine‐Functionalized Resin‐Supported Pd(0) Catalyst: Activity,Reusability, and Redeposition of Active Pd Species in Heck Vinylation |
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| Authors: | Yuan‐Fa YANG Mao‐Ling LU Bin XU Zhao‐Xia ZENG |
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| Institution: | 1. Tel.: 0086‐0579‐82282234;2. Fax: 0086‐0579‐82282595;3. Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004, China;4. Hangzhou Zhengguang Resin Co.Ltd, Hangzhou, Zhejiang 311106, China |
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| Abstract: | The guanidine‐functionalized resin‐supported Pd(0) catalyst GDR·Pd(0)] is highly active in Heck reaction of aryl bromides with acrylic acid or styrene without the need to exclude air. The catalyst can be recycled at least 9 times without significant loss of activity in N‐methyl‐2‐pyrrolidone at 140 °C. The Heck reaction proceeds homogeneously with dissolved palladium species and the dissolved active palladium species can redeposit onto the surface of catalyst in the reaction. The XRD peak shifting of Pd phases in the catalyst provides the evidence for the re‐deposition of the active palladium species. |
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| Keywords: | Heck reaction guanidine resin supported palladium(0) catalyst redeposition heterogeneous catalyst recycling |
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