聚苯乙烯键合麻黄碱-Co(Ⅱ)络合物对烯烃环氧化反应的催化作用

PREPARATION OF POLYMER SUPPORTED TRANSITION METAL COMPLEXES AND THEIR CATALYTIC BEHAVIOR IN THE EPOXIDATION OF OLEFINS

聚苯乙烯键合麻黄碱Ｃｏ（Ⅱ）络合物对烯烃环氧化反应的催化作用刘庆艳刘必前何纪纲（中国科学院化学研究所北京１０００８０）关键词环氧化，分子氧，烯烃，醛，高分子催化剂烯烃的环氧化反应是将烯烃进行氧化转化的重要反应［１］．由于高分子催化剂具有与反应...

Novel polymer supported transition metal complexes chloromethyl polystyrene bound ephedrine cobalt(Ⅱ) were synthesized (abbreviated as CPSE Co).The catalytic activity of these complexes was evaluated in terms of their ability to oxidize different olefins in the presence of isobutaldehyde.Reaction temperature and concentration of active center in the catalyst have great influence on the reaction rate.Trans stilbene could be converted quantitatively to epoxy stilbene in 6hrs at 40℃ and the selectivity was over 90%.The catalyst could be recycled at least 5 times without loss of activity.CPSE Co complexes are highly active,selective and stable catalysts for the epoxidation of olefins.