摘要
研究了温和条件下以亚碘酰苯为氧源，非对称性的Ｍｎ（Ⅲ）希夫碱配合物［Ｍｎ（Ⅲ）（ＣＢＰ－ｐｈｅｎ－Ｘｓａｌ）Ｃｌ，Ｘ＝Ｈ、ＮＯ２、ＯＣＨ３］催化非官能性烯烃：苯乙烯、环己烯和α－甲基苯乙烯的环氧化反应，考察了溶剂、供体配体、底物烯烃相对反应活性诸因素对环氧化反应的影响．结果表明，在不同溶剂中催化效果差别很大；供体配体的存在能显著提高催化反应的效率；不同的底物在所采用的催化体系中存在着竞争反应．
おn this paper, the effect of reaction media, donor ligand, the relative reactivity of the substrate olefins of the selective epoxidation of unfunctionalized olefins(styrene, cyclohexene, αmethylstyrene) catalyzed by synthesized unsymmetric SchiffbaseMn(Ⅲ) complexes Mn(CBPphenXSal)Cl [X=H, NO2, OCH3] were investigated under mild conditions with iodosylbenzene as the terminal oxidant. The results show that: the epoxidation yields vary greatly in different reaction media; the epoxidation effectiveness increased noticeably in the presence of donor ligand(Py); the relative reactivity of the three olefins was different for the discussed catalysts.
出处
《分子催化》
EI
CAS
CSCD
北大核心
1998年第1期26-30,共5页
Journal of Molecular Catalysis(China)
基金
羰基合成与选择氧化国家重点实验室基金
关键词
非对称
锰
席夫碱
烯烃
环氧化
配合物
催化剂
Unsymmetric Mn(Ⅲ)Schiff base complexes, Catalytic epoxidation, Donor ligand, Competitive reaction, Reaction media effect
