Phenylethylenes can be oxidized in methanol by hydrogen peroxide in the presence of zeolite beta containing titanium (TGP) to give predominantly glycol monomethyl ethers (arising from the acid-catalyzed opening up of the primary epoxide) accompanied by lower amounts of carbonyl compounds (derived from the oxidative C=C bond cleavage). These results contrast with those obtained using the same Ti-beta catalyst in acetonitrile or acetone as solvent or with those previously reported using titanium silicalite, where C=C bond rupture was the main process.