Practical preparation method of polymer-incarcerated (PI) palladium catalysts using Pd(II) salts.
Practical preparation method of polymer-incarcerated (PI) palladium catalysts using Pd(II) salts.
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DOI：
10.1021/ol052310y
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发表时间：
2006-01
期刊：
影响因子：
5.2
通讯作者：
H. Hagio;M. Sugiura;S. Kobayashi
中科院分区：
文献类型：
--
作者：
H. Hagio;M. Sugiura;S. Kobayashi
[反应：见正文]。以廉价的Pd(II)盐和聚苯乙烯基共聚物为原料，在还原条件下制备了聚合物嵌埋钯催化剂。碱金属盐对钯的负载量有显著影响。制备的PI-Pd在Mizoroki-Heck反应和Suzuki-Miyaura偶联反应中表现出很高的催化活性。在所有情况下，Pd催化剂都得到了定量回收，没有淋洗，并多次重复使用，没有显著的活性损失。
[reaction: see text]. Polymer-incarcerated (PI) palladium catalyst was practically prepared from inexpensive Pd(II) salts and a polystyrene-based copolymer under reducing conditions. Remarkable effects of alkali metal salts on the palladium loading were observed. PI Pd thus prepared showed high catalytic activity in Mizoroki-Heck reactions and Suzuki-Miyaura couplings with a range of substrates including an aryl chloride. In all cases, the Pd catalyst was recovered quantitatively without leaching, and reused several times without significant loss of activity.