Water-Soluble Palladium Click Chelating Complex: An Efficient and Reusable Precatalyst for Suzuki-Miyaura and Hiyama Reactions in Water
作者:Fanzhen Kong、Chunshan Zhou、Jinyun Wang、Zhangyu Yu、Ruihu Wang
DOI:10.1002/cplu.201300067
日期:2013.6
ionic, bidentate, nitrogen‐containing ligand; no palladium black was detected after the aqueous solution of palladium NPs was stored in air for months. The use of 3 as a precursor in the formation of palladium NPs was further explored by using NaBH4 and hydrogen as reductive reagents. The resulting NPs displayed different sizes, surface properties, and catalytic performances in the Suzuki–Miyaura cross‐coupling
水溶性离子型钯(II)含氮螯合配合物,[钯(II)1-(4- N,N ',N ''-三甲基丁基铵)-4-(2-吡啶基)-1 H -1, 1,2,3-三唑二氯化物]氯(3),是通过将1-氯-4-溴丁烷,叠氮化钠,和2-乙炔基吡啶的点击反应制备,随后的Me中quarternization 3 N和随后的反应与[钯( cod)Cl 2 ](cod = 1,5-环辛二烯)。配合物3的催化性能通过芳基溴化物的Suzuki-Miyaura和Hiyama交叉偶联反应进行了初步评估;在水中观察到优异的催化活性。TEM分析表明,催化反应后,形成了具有窄尺寸分布的小钯纳米粒子(NPs)。通过离子,二齿,含氮配体的配位和静电相互作用的协同作用使NP稳定。钯NPs的水溶液在空气中存放数月后,未检测到钯黑。通过使用NaBH 4进一步探索使用3作为前体在钯NP中的形成和氢气作为还原剂。所产生的NP在水中的Suzuki