Temperature variable pyrolyses of 2,6-disubstituted phenyl azidoformates
Abstract
On pyrolysis, 2,6-di-isopropylphenyl azidoformate gives primarily a cyclohexadienone dimer, a benzoxazolone, or a benzoxazinone dependent upon temperature while 2-methyl-4,6-di-t-butylphenyl azidoformate gives 2-isocyanato-2-methyl-4,6-di-t-butylcyclohexa-2,4-dienone at lower temperature but 5-t-butyl-7-methylbenzoxazol-2-one at higher temperature.