Die Thermolyse von Diaryltetrazolen mit ortho‐ständiger Nitrogruppe in einem der aromatischen Substituenten [(lIb)‐(Ilt)] führt unter Abspaltung von N2 und CO2 zu Benzotriazolen wie (IV).
SW7 2AY) Summary 2-Nitrodiphenylcarbodi-imide, generated by Ph * N , thermolysis of the heterocyclic precursors (1) , (4), (5), and (6), and prepared by oxidation of 2-nitrodiphenylphenylbenzotriazole thiourea, is rapidly (3) transformed and carbon in high dioxide, yield in into a new 2-a;;:+N ~
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