Naphthalene-1-ONN-azoxybenzenes and some unsymmetrically ortho-substituted ONN- and NNO-azoxybenzenes were prepared, and their photochemical behavior in ethanol was compared. The crowded azoxyarenes tend to undergo a facile Wallach rearrangement via the known azoxy-ortho oxygen mirgation and a concurrent pathway involving ONN–NNO isomerization. The relative contribution of the two pathways was affected by substituents.
研究人员制备了
萘-1-ONN-氮氧苯和一些不对称正交取代的ONN-和 NNO-氮氧苯,并比较了它们在
乙醇中的光
化学行为。受挤压的偶氮氧苯往往会通过已知的偶氮氧-正交氧镜像反应和同时涉及 ONN-NNO 异构化的途径进行简单的 Wallach 重排。这两种途径的相对贡献受取代基的影响。