The Titanium(IV)-Catalyzed Epoxidation of Alkcnes by tert-Mkyl Hydroperoxides

摘要

Ever since it was reported that titanosilicalites, such as TS-1 synthesized by the company Enichem, could catalyticaily and selectively oxidize certain organic compounds in the presence of H,O- (For example, phenol to hydroquinone and propene to propene oxide), there has been considerable interest in other low-temperature selective oxidations with various kinds of Ti~(IV)-containing siliceous microporous catalysts. Conna et al. have demonstrated the catalytic merit of using larger pore microporous materials, such as Ti~(IV)-containing β-zeolite, and the commercially available tert-butyl hydroperoxide (TBHP) as a sacrificial oxidnnt.