摘要
为了实现温和条件下的烯烃环氧化,近年来对模拟单加氧酶细胞色素P—450的催化氧化研究十分活跃。Tabushi,I.,Meunier,B.等人用卤素取代的四苯基卟啉锰/次氯酸钠作为烯烃催化环氧化的模拟体系实现了环辛烯和1一十二碳烯的环氧化,并讨论了轴向配体、配体—卟啉比及溶液PH对催化活性和选择性的影响,但有关这方面的研究报道不多。已有的研究表明:多卤代和多甲基取代的金属卟啉催化效果较为理想。
This paper reports the epoxidation of styrene catalyzed by Mn (Ⅲ)-porphyrin under two-phase conditions with ClO^-as oxidants. The influence concerning the structure of the axial ligand,the type of phase-transfer catalyst and oxidants concentration etc. on epoxide yields and conversions of styrene have been investigated. It has been found that the epoxide yield and selectivity are close to 100% under the N-methyl imidazol as axial ligand,and nonion type surface active crown ether decyloxy methyl 15-C-5 as PTC.
出处
《化学研究与应用》
CAS
CSCD
1993年第3期79-82,共4页
Chemical Research and Application
关键词
环氧化
相转移催化剂
苯乙烯
epoxidation
phase transfer catalyst
axial ligand
