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有机化学
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有机化学 ›› 1999, Vol. 19 ›› Issue (4): 395-400. 上一篇    下一篇

研究论文

聚γ-(β-氰乙硫基)丙基硅氧烷钯(0)配合物的合成与催化性能

蔡明中;廖志勇;盛寿日;宋才生   

  1. 江西师范大学化学系.南昌
  • 发布日期:1999-08-25

Synthesis of poly-γ-(β-cyanoethylsulfenyl) propylsiloxane palladium (0) complex and its catalytic property

Cai Mingzhong;Liao Zhiyong;Sheng Shouri;Song Caisheng   

  1. Jiangxi Normal Univ., Dept of Chem.Nanchang
  • Published:1999-08-25

γ-(β-氰乙硫基)丙基三乙氧基硅烷依次用气相法二氧化硅固载,与氯化钯反应,然后用水合肼还原,合成了二氧化硅负载的聚γ-(β-氰乙硫基)丙基硅氧烷钯(0)配合物。研究了其催化共轭烯烃Heck芳基化反应的性能。

关键词: 二氧化硅, 聚硅氧烷, 催化性能, 水合肼, 氯化钯, 芳基化, 丙基硅氧烷, 合成, 负载型催化剂, 钯络合物

A fume silica-supported poly-γ-(β-cyanoethylsulfenyl) propylsiloxane palladium (0) complex was synthesized from γ-(β - cyanoethylsulfenyl) propyltriethoxysilane and fume silica via hydrolysis, followed by treatment with palladium chloride in acetone and then the reduction with hydrazine hydrate in ethanol. The complex was characterized by elemental analysis and XPS. The title complex is an efficient catalyst for Heck arylation of styrene and acrylic acid with aryl iodides. This polymeric palladium (0) catalyst is stable to air and can be reused without noticeable loss of activity. Hence this paper presents a simple and practical stereo-selective synthetic method for unsymmetrical trans-stilbenes and substituted trans- cinnamic acids.

Key words: SYNTHESIS, CATALYTIC BEHAVIOUR, ARYLATION, SUPPORTED CATALYST, PALLADIUM CHLORIDE, STEREOSELECTIVITY, POLYSILOXANE, PALLADIUM COMPLEX, SILICON DIOXIDE, HYDRAZINE HYDRATE

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