炭负载Pd/Ce双金属催化剂对Heck反应的催化性能

doi:10.11944/j.issn.1000-0518.2015.04.140298

摘要/Abstract

摘要：

通过简便的方法制备了炭负载Pd/Ce双金属催化剂,利用Pd/Ce双金属催化剂的协同效应提高催化剂对Heck反应的催化效率。以碘苯与丙烯酸的Heck芳基化反应为模型反应,研究了反应条件对催化剂催化性能的影响。结果显示,在反应温度为130 ℃,反应时间为5 h,N,N-二甲基甲酰胺(DMF)作为溶剂和三丁胺(Bu₃N)作为碱的条件下,炭负载Pd/Ce双金属催化剂对丙烯酸和碘苯的Heck芳基化反应具有良好的催化性能,产率达到70%以上。另外,该催化剂属于非均相催化剂,催化剂易与反应溶液分离;也可以重复利用,使用3次反应产率仍达到66.9%,显示了炭负载Pd/Ce双金属催化剂良好的催化活性。

关键词: Heck反应, 双金属催化剂, 催化效率

Abstract:

Carbon supported Pd/Ce bimetallic catalyst was prepared readily for Heck reaction. The effect of reaction conditions on the catalytic properties of carbon supported Pd/Ce bimetallic catalyst was studied in details with the model Heck reaction of iodobenzene and acrylic acid. The results show that carbon supported Pd/Ce bimetallic catalyst can effectively catalyze the Heck reactions under the conditions of 130 ℃, 5 h, DMF as the solvent, and Bu₃N as the base to afford the product with a yield of over 70%. Additionally, the heterogeneous carbon supported Pd/Ce bimetallic catalyst can be easily separated from the reaction solution. Furthermore, the catalyst can be reused for 3 times with a yield of 69% and without the significant loss of catalytic efficiency.

Key words: Heck reaction, bimetallic catalyst, catalytic

中图分类号:

O643

徐启杰, 时文中, 左春山, 刘大勇, 杨春, 赵翔, 刘鹏程. 炭负载Pd/Ce双金属催化剂对Heck反应的催化性能[J]. 应用化学, 2015, 32(4): 428-432.

XU Qijie, SHI Wenzhong , ZUO Chunshan, LIU Dayong, YANG Chun, ZHAO Xiang, LIU Pengcheng. Catalytic Properties of Carbon Supported Pd/Ce Bimetallic Catalyst on Heck Reaction[J]. Chinese Journal of Applied Chemistry, 2015, 32(4): 428-432.

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