naphthoxazine by-products made the separation/purification of the products challenging, therefore the reactions were repeated and systematically studied, starting from secondary and tertiary aminonaphthol derivatives, when the isolation of an ortho-quinonemethide structure occurred unexpectedly. Scope and limitations of its formation were also investigated. Conformational studies including ring inversion of a
通过修饰的曼尼希型合成途径,通过4,5-二氢-3 H-苯并[ c ]氮杂或6,7-二氢
噻吩并[3, 2- c ]
吡啶和不同的取代
氨基
萘。使用微波辐射优化了反应条件,反应时间相对较短,温度为80°C。不需要的
萘并恶嗪副产物的形成使产物的分离/纯化具有挑战性,因此,当分离邻位时,从仲
氨基和叔
氨基
萘酚衍
生物开始重复和系统地研究反应,从仲和叔
氨基
萘酚开始-醌甲基化物结构出乎意料地发生。还研究了其形成的范围和局限性。使用NMR方法和补充DFT建模进行了构象研究,包括对新型多
杂环化合物的选择进行环倒置。