Abstract
An efficient epoxidation process for various terpenes and styrenes
using a hydrogen peroxide-tungsten catalytic system with organic
solvent- and halide-free conditions was developed. In the presence
of the catalytic system, Na2WO4, PhP(O)(OH)2,
and [Me(n-C8H17)3N]HSO4,
and under weak acidic conditions, hydrogen peroxide successfully
epoxidized α-pinene to α-pinene oxide in 95% selectivity
at 91% conversion, while the previously published conditions
utilizing NH2CH2P(O)(OH)2 as a
promoter provided no epoxide.
Key words
oxidation - catalysis - epoxides - terpenoids - styrenes