二氧化硅负载壳聚糖络合铂催化烯丙基缩水甘油醚硅氢加成反应

将壳聚糖(CS)负载到SiO2上得到SiO2-CS,再与Pt配位,制得二氧化硅负载壳聚糖络合铂催化剂(SiO2-CS-Pt)。以烯丙基缩水甘油醚和三甲氧基硅烷的硅氢加成为模型反应,考察了SiO2-CS-Pt的催化性能,研究了温度、原料配比、反应时间等对目的产物的收率的影响,结果表明该催化剂具有较好的催化活性和重复利用性能。目的产物收率达59.7%,催化剂连续使用4次,活性下降不大。

Hydrosilylation of allyl glycidyl ether catalyzed by silica-supported chitosan-platinum complex

Chitosan was supported on the surface of silicon dioxide,and then platinum was coordinated on it to prepare silica-supported chitosan-platinum(SiO_2-CS-Pt) heterogeneous catalyst.The hydrosilylation of allyl glycidyl ether with trimethoxy silane was studied as a model reaction.The effects of reaction temperature,the reactants molar ratio,reaction time on the performance of the catalyst were investigated,with the reuse of catalyst observed.The results demonstrated that SiO_2-CS-Pt has a good catalytic activity and recyclability.The yield of the objective product can be 59.7%.The catalytic activity of SiO_2-CS-Pt had no marked decrease after it was used for 4 times.