Synthesis of a new polycyclic heterocyclic ring system. Part III. Benzo[<i>b</i>]imidazo[1,5-<i>d</i>][1,4]oxazepine-1,4(2<i>H</i>,5<i>H</i>)-diones
作者:Desislava V. Stanisheva、Mariana S. Gerova、Ognyan I. Petrov
DOI:10.1515/hc-2016-0236
日期:2017.2.1
Abstract A series of novel tricyclic benzoxazepines with fused imidazolone ring was prepared in five steps starting from the corresponding benzoxazolones 1–3. The key to the reported synthetic approach is transformation of 3-(2-oxopropyl)-2(3H)-benzoxazolones 4–6 to 1-(2-hydroxyphenyl)-4-methyl-1,3-dihydro-2H-imidazol-2-ones 7–12, and their subsequent conversion to the phenoxyacetic acids 19–24, which
摘要 从相应的苯并恶唑酮 1-3 开始,分五步制备了一系列具有稠合咪唑酮环的新型三环苯并恶氮杂。报道的合成方法的关键是将 3-(2-oxopropyl)-2(3H)-benzoxazolones 4-6 转化为 1-(2-hydroxyphenyl)-4-methyl-1,3-dihydro-2H-imidazol- 2-ones 7-12,随后转化为苯氧乙酸 19-24,最终在多磷酸中酰化形成氧氮杂环。