Epoxidation of Olefins by Ketone-H2O2 System

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作者：
Zheng, Yan-Song [1 ]
Xiao, Qin [1 ]
机构：
[1] Department of Chemistry, Huazhong Univ. of Sci. and Technol., Wuhan 430074, China
来源：
Kao Teng Hsueh Hsiao Hua Heush Hsueh Pao/ Chemical Journal of Chinese Universities | 2001年 / 22卷 / 07期
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摘要：
Epoxidation of olefins was carried with an excellent yield by dioxiranes generated in situ by reaction of ketone with H2O2 in the presence of NaHCO3 in mixed solvent of acetonitrile and water. The catalytic activity of various ketones on epoxidation was studied for the first time. It is found that the ketone with electron-withdrawing group has an excellent catalytic activity and trifluromethyl ketone has the highest catalytic activity. Some bulky ketones with electron-withdrawing group show a very low catalytic activity. For olefins, the electron-withdrawing group decreased the reactivity of the olefin and the electron-donating group increased the reactivity, but the steric factor has little effect on the reactivity of olefins.
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