壳聚糖亚胺环钯化合物的合成及其催化性能研究  

Synthesis of Chitosan-Supported Imine Palladacycles and Their Catalytic Performances

作　　者：刘蒲[1] 刘晔[2] 李晶玉[1] 刘一真[1] 卢伟鹏[1] 王向宇[1] 李利民[1] 

机构地区：[1]郑州大学化学系,郑州450052 [2]华东师范大学化学系上海市绿色化学与化工过程绿色化重点实验室,上海200062

出　　处：《有机化学》2007年第1期87-91,共5页Chinese Journal of Organic Chemistry

摘　　要：壳聚糖与苯甲醛或其衍生物作用制得壳聚糖席夫碱,再与氯化钯锂的甲醇溶液作用,制得壳聚糖亚胺环钯催化剂.该类催化剂对空气和水稳定,对于苯乙烯与芳基碘的交叉偶联反应具有较高的催化活性和选择性,经简单分离回收可重复使用多次.为立体选择性合成各种取代的1,2-二苯乙烯提供了一种制备简单、实用的高活性绿色催化剂体系.Chitosan-supported imine palladacycle catalysts were synthesized from chitosan and benzaldehyde or its derivatives via grafting to form chitosan Schiff base, followed by treatment with Li2PdCl4 in methanol. These natural polymeric palladacycle catalysts are stable to air and moisture, and can catalyze the cross coupling reaction of aryl iodide with PhCH=CH2 in high activity and selectivity. It can be reused several times by the simple filtration separation from the reaction mixture. It can provide an easy prepared and green catalytic system that is practical and highly active to synthesize stilbene and its derivatives.

关 键 词：壳聚糖席夫碱 亚胺环钯化合物 偶联反应 立体选择性 

分 类 号：O643.36[理学—物理化学]