Novel Rearrangements in the Reactions Directed Toward Preparation of Spiro-N,N-ketals: Reactions of Naphthalene-1,8-diamine with Ninhydrin and Isatin
作者:Motoko Akita、Hideyuki Seto、Reiko Aoyama、Junko Kimura、Keiji Kobayashi
DOI:10.3390/molecules171213879
日期:——
Spiro-N,N-ketal 5, consisting of a phthaloperine heterocyclic ring and a naphtha[1,8-ef][1,4]diazepine ring, was obtained along with spiro-N,N-ketal 2 via 2,2-condensation in the reaction of ninhydrin with naphthalene-1,8-diamine. Their molecular structures were elucidated by X-ray crystal structural analysis. Aside from these spiro compounds, the diazapleiadiene compound 3 formed by 1,2-condensation
由酞菁杂环和石脑油[1,8-ef][1,4]二氮杂环组成的螺-N,N-缩酮5与螺-N,N-缩酮2通过2,2-茚三酮与萘-1,8-二胺反应缩合。通过X射线晶体结构分析阐明了它们的分子结构。除了这些螺环化合物外,还分离出1,2-缩合形成的二氮杂茚二烯化合物3和扩环形成的1,4-异喹啉二酮化合物4。当靛红与萘-1,8-二胺反应时,螺-N,N-缩酮6 和两种1H-哌啶类化合物7 和8 被分离出来。化合物 8 被揭示在溶液中经历了快速的动态质子互变异构化。提出了产品形成的合理机制。