An improved methyltrioxorhenium-catalyzed epoxidation of alkenes with hydrogen peroxide

被引：37

作者：

Yamazaki, Shigekazu ^{[1
]}

机构：

[1] Toyama Ind Technol Ctr, Toyama 9330981, Japan

来源：

ORGANIC & BIOMOLECULAR CHEMISTRY | 2007年 / 5卷 / 13期

关键词：

D O I：

10.1039/b705276f

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Methyltrioxorhenium (MTO)-catalyzed epoxidation of alkenes with H2O2 has been significantly improved by using 3-methylpyrazole as an additive. A system consisting of 35% H2O2 and MTO-3-methylpyrazole in CH2Cl2 catalyzes the epoxidation of various alkenes in excellent yields. The catalytic activity of MTO - 3- methylpyrazole surpasses MTO - pyrazole and MTO - pyridine catalysts. Quantitative yields of epoxides from cyclic and internal alkenes were obtained with only 0.05 - 0.1 mol% of MTO in the presence of 10 mol% of 3-methylpyrazole.

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页码：2109 / 2113

页数：5

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