ABSTRACT
The selectivity in oxidation of intramolecular competitive reaction with TS-1 and TS-2 catalysts is greatly dependent on the structure of substrates. In the oxidation of unsaturated alcohols having a terminal CH2=CH- double bond, its epoxidation occurs in preference to the oxidation of the alcoholic group. With unsaturated alcohols having an internal -CH=CH-double bond, epoxidation and alcohol oxidation occur competitively. These selectivities are interpreted in terms of ability to coordinate to the active site in the following order CH2=CH- > -CH=CH- > alcoholic group. In the oxidation of alkenylbenzenes the double bond retards the hydroxylation of the benzene ring. In intermolecular competitive reactions the selectivity is also determined by coadsorption behavior when the dimensions and polarity of molecules are significantly different.
