【摘要】 4 氧杂 6 ,7 环硫庚基三甲氧基硅烷依次与二乙胺、气相法二氧化硅及水、氯化钯反应 ,接着用水合肼还原 ,合成了聚 4 氧杂 6 巯基 7 二乙胺基庚基硅氧烷钯 (0 )配合物 .研究了其在Heck芳基化反应中的催化特性 .更多还原

【Abstract】 A fume silica bound poly 4 oxa 6 mercapto 7 diethylaminoheptylsiloxane palladium(0) complex was synthesized from γ (2,3 epothiopropoxy)propyltrimethoxysilane via diethylamination with diethylamine,immobilization on fume silica,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 conjugated olefin such as styrene、acrylic acid and butyl acrylate with aryl iodides.This polymeric palladium(0) catalyst is stable to air and can be reused without noticeable loss of activity.更多还原