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有机化学
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有机化学 ›› 2009, Vol. 29 ›› Issue (10): 1587-1592. 上一篇    下一篇

研究论文

正电性磁性氧化铁胶粒负载钯催化的Suzuki偶联反应

刘诗咏*,a   吴家守a   蒋华江a   金正能a   姜玄珍b   

  1. (a浙江省台州学院城东校区医化学院 临海 317000) (b浙江大学玉泉校区理学院化学系 杭州 310027)
  • 收稿日期:2009-02-07 修回日期:2009-03-30 发布日期:2009-05-15

Suzuki Coupling Reaction Catalyzed by Palladium Supported on Positively Charged Colloids of Magnetic Iron Oxide

Liu, Shiyong*,a   Wu, Jiashoua   Jiang, Huajianga   Jin, Zhengnenga   Jiang, Xuanzhenb   

  1. (a College of Chemistry & Pharmacy, Taizhou University, Linhai 317000) (b Department of Chemistry, Zhejiang University, Hangzhou 310027)
  • Received:2009-02-07 Revised:2009-03-30 Published:2009-05-15

PDF

1742

被引次数

24

发展了一种超顺磁性Fe3O4纳米粒子负载Pd0的简易方法. 利用Fe3O4溶胶带正电荷的特性, 将负离子 通过静电作用吸附在Fe3O4胶体粒子表面( /Fe3O4), 以抗坏血酸(Vc)进一步还原即得到载有金属Pd团簇的Fe3O4胶体粒子(Pd0/Fe3O4). 该磁性载体负载的Pd催化剂对Suzuki反应表现出良好的催化活性, 且在反应后, 可方便地通过永久磁铁将催化剂从反应体系中分离出来, 进行循环使用. 试验表明, 该催化剂在循环使用五次后反应活性无明显下降. 进一步试验发现, 这种磁性纳米粒子负载的金属钯对一系列卤代芳烃的Suzuki偶联反应均表现出较优的催化活性.

关键词: 钯, 纳米粒子, 正电荷溶胶, 磁性氧化铁, Suzuki反应

A facile way to combine Pd0 with superparamagnetic Fe3O4 nanoparticles (NP) was provided, in which was immobilized directly on the cationic Fe3O4 colloids through electrostatic interaction ( /Fe3O4). Further reduction of the /Fe3O4 NP by vitamin C resulted in Pd0/Fe3O4 NP. These magnetic NP-supported Pd0 clusters showed high efficiency toward Suzuki reactions. After reactions, the Pd0/Fe3O4 NP could be facilely recycled by permanent magnet. This catalyst could be reused for 5 times without significant loss in catalytic activity. Suzuki coupling reaction of a variety of aryl halides was also catalyzed efficiently by this magnetic NP supported Pd0.

Key words: Pd, nanoparticle, cationic colloid, magnetic iron oxide, Suzuki reaction