The Construction of Polycyclic Pyridones via Ring-Opening Transformations of 3-hydroxy-3,4-dihydropyrido[2,1-c][1,4]oxazine-1,8-diones
作者:Viktoria V. Viktorova、Elena V. Steparuk、Dmitrii L. Obydennov、Vyacheslav Y. Sosnovskikh
DOI:10.3390/molecules28031285
日期:——
This work describes the synthesis of 3-hydroxy-3,4-dihydropyrido[2,1-c][1,4]oxazine-1,8-diones, their tautomerism, and reactivity towards binucleophiles. These molecules are novel and convenient building-blocks for the direct construction of biologically important polycyclic pyridones via an oxazinone ring-opening transformation promoted with ammonium acetate or acetic acid. In the case of o-phenylenediamine
这项工作描述了 3-hydroxy-3,4-dihydropyrido[2,1-c][1,4]oxazine-1,8-diones 的合成、它们的互变异构以及对双亲核试剂的反应性。这些分子是通过乙酸铵或乙酸促进的恶嗪酮开环转化直接构建生物学上重要的多环吡啶酮的新型和方便的构建块。在邻苯二胺的情况下,所得杂环的部分芳构化继续形成多环苯并咪唑稠合吡啶酮 (33-91%)。