有机硅聚合物负载环硫乙烷钯(0)配合物的合成与催化性能

SYNTHESIS AND CATALYTIC CHARACTERISTICS OF POLYSILOXANE SUPPORTED THIIRANE PALLADIU M(0) COMPLEX

４氧杂６ ，７环硫庚基三甲氧基硅烷依次与气相法二氧化硅、氯化钯作用，再用水合肼还原，合成了二氧化硅固载的聚４氧杂６ ，７环硫庚基硅氧烷钯（０） 配合物，研究了其催化共轭烯烃的 Ｈｅｃｋ

A fume silica supported poly 4 oxa 6 ,7 epithioheptylsiloxane palladium (0 )complex was synthesized from γ (2 ,3 epithiopropoxy) propyltrimethoxysilane and fumesilica via hydrolysis,followed by treatment with palladium chloride in acetone and then thereduction with hydrazine hydrate in ethanol. It was found that the title complex is anefficient catalystfor Heck arylation ofstyrene and acrylic acid . When aryliodides were usedas arylating reagents, the corresponding trans coupling products were obtained in highyields. This polymeric palladium (0) catalyst is stable to air and can be reused withoutnoticeableloss of activity . Hence this paper presents a simple and practical stereo selectivesynthetic method for unsym metricaltrans stilbenes and substituted trans cinnamic acids .