The fabrication of reactive hollow polysiloxane capsules and their application as a recyclable heterogeneous catalyst for the Heck reaction
The fabrication of reactive hollow polysiloxane capsules and their application as a recyclable heterogeneous catalyst for the Heck reaction
复制标题
反应性空心聚硅氧烷胶囊的制备及其作为 Heck 反应可回收多相催化剂的应用
DOI：
10.1039/b612953f
复制
发表时间：
2006-12
影响因子：
--
通讯作者：
中科院分区：
文献类型：
--
作者：
研究了空心聚硅氧烷胶囊负载钯配合物的制备。首次制备了胶囊负载的氰基钯（0）配合物，并研究了其在烯烃Heck芳基化反应中的催化性能。通常，该方法包括将4-（三乙氧基甲硅烷基）丁腈和二甲基二甲氧基硅烷单体连续共缩合到预形成的聚二甲基硅氧烷的微乳液上，随后通过暴露于溶剂除去模板化的聚二甲基硅氧烷，然后将上述产物与乙酸钯在无水甲苯中反应，并用KBH 4在乙醇中还原，以产生中空聚硅氧烷胶囊负载的钯络合物。紫外-可见光谱和红外光谱表明，该胶囊与钯发生了螯合作用;透射电镜和原子力显微镜的测量结果表明，制备出了中空聚硅氧烷胶囊负载的钯配合物。这些配合物对Heck反应具有高度的活性和立体选择性，并且可以容易地从反应混合物中分离。此外，这些聚硅氧烷胶囊负载的钯（0）催化剂可以回收和重复使用，具有高催化稳定性。
The fabrication of hollow polysiloxane capsule-supported palladium complexes has been investigated. Capsule-supported cyano-palladium(0) complexes were firstly prepared and their catalytic performance in the Heck arylation of alkenes was studied. Generally the method involves the consecutive cocondensation of 4-(triethoxysilyl)butyronitrile and dimethyldimethoxysilane monomers onto a microemulsion of preformed polydimethylsiloxane and the subsequent removal of the templated polydimethylsiloxane by exposure to solvents, and then the above product is reacted with palladium acetate in anhydrous toluene and reduced with KBH4 in ethanol to produce the hollow polysiloxane capsule-supported palladium complex. UV-VIS spectra and FT-IR spectra indicated that the capsules chelated with the palladium and the results of TEM and AFM measurements show that a hollow polysiloxane capsule-supported palladium complex has been prepared. These complex are highly active and stereoselective for the Heck reaction and can be easily separated from the reaction mixture. Moreover, these polysiloxane capsule-supported palladium(0) catalysts can be retrieved and reused with high catalytic stability.
登录
查看更多内容
影响因子：
--
作者：
V. Pavlyuchenko;O. V. Sorochinskaya;O. N. Primachenko;S. Ivanchev
通讯作者：
V. Pavlyuchenko;O. V. Sorochinskaya;O. N. Primachenko;S. Ivanchev
影响因子：
4.9
作者：
Kim, JW;Choi, SH;Watt, GD
通讯作者：
Watt, GD
影响因子：
4.9
作者：
Tong, JH;Su, LL;Suda, H
通讯作者：
Suda, H
影响因子：
--
作者：
Huigang Wang;Pin Chen;Xiao-ming Zheng
通讯作者：
Huigang Wang;Pin Chen;Xiao-ming Zheng
影响因子：
4.9
作者：
Suzuki, A
通讯作者：
Suzuki, A