have the same meanings as defined above as the dehydrogenating agent oxidizing agent and base may be used there may be mentioned oxidizing agent such as metal oxides potassium permanganate etc platinum group metals platinum palladium osmium iridium ruthenium rhodium etc and it 39 s salts with mineral acids such as hydrochloride halogenating agent thionyl chloride sulfulyl chloride etc quinones ddq etc sulfur the platinum group metals and it 39 s salts with mineral acids such as hydrochloride may be supported on a carrier such as activated charcoal graphite silica alumina silica alumina zeolite zirconia diatomaceous earth barium sulfate etc the oxidizing agent may be used in a stoichiometrical amount or 0 001 to 20 times the stoichiometrical amount but preferably a stoichiometrical amount or 0 05 to 10 times the stoichiometrical amount the reaction may be run under high concentration of oxygen these agents may be used with oxygen as the base there may be used alkaline metal hydroxide such as potassium hydroxide sodium hydroxide etc alkaline metal carbonate such as potassium carbonate sodium carbonate etc alkaline metal alkoxide such as sodium methoxide sodium ethoxide potassium t butoxide etc alkaline metal hydrides such as sodium hydride etc but preferred alkaline metal alkoxides the base may be used in a stoichiometrical amount or 0 5 to 20 times the stoichiometrical amount.