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.
D. G. Hawkins, O. Meth-Cohn and S. Rhouati, J. Chem. Soc., Chem. Commun., 1983, 1254 DOI: 10.1039/C39830001254
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