An investigation has been made of the dehydroisomerization and oxidative dehydrogenation of 4-vinylcyclohexene in the presence of a copper-magnesium oxide system, and also modified forms of H-mordenite and H-clinoptilolite. The highest selectivity of the reaction and the highest overall yields of ethylbenzene and styrene were obtained on zeolite catalysts in the presence of air oxygen. At a temperature of 400-470 degrees C and with a hydrocarbon/O-2/N-2 molar ratio of 1:0 3:4, the overall yield of ethylbenzene and styrene on Fe-Gd-K-O/H-mordenite and Fe-Tb-K-O/H-clinoptilolite amounts to 44.7-77.6%. The introduction of carbon dioxide into the reaction mixture promotes a reduction in the rate of degradative oxidation of 4-vinylcyclohexene and an increase in the selectivity of the process with respect to ethylbenzene and styrene. On the basis of experimental data, possible mechanisms of the reaction are proposed.