Photosonochemical catalytic ring opening of α-epoxyketones

Abstract

The combination of ultrasound and photochemical methods has been used for the catalytic ring opening of α-epoxyketones by 1-benzyl-2,4,6- triphenylpyridinium tetrafluoroborate (NBTPT) as photocatalyst in methanol. Sonication of these compounds in the presence of NBTPT did not result in the opening of epoxide ring, but the use of ultrasound increased the rate of photoreaction. © 2007 Memarian and Saffar-Teluri; licensee Beilstein-Institut.