Synthesis of N–C Fused Bicyclic 1,3,5-Triazinane-2,4-dione Derivatives from Saturated Ring-Fused Urazoles
作者:Bhanu N. Manjunath、Subhaskar R. Panga、Roger G. Hall、Ashok Shyadligeri、Shrikant A. Shete
DOI:10.1055/s-0042-1751410
日期:2023.3
urazole derivatives with LDA at –78 °C to 25 °C resulted in fragmentation of the N–N bond to form an imine that underwent intramolecular cyclization, resulting in moderate yields of nonsymmetric heterocyclederivatives with an asymmetric (racemic) center and various ring sizes. The utility of these transformations was extended to syntheses of a tricyclic system and bicyclic systems containing additional
新型双环 1,3,5-triazinane-2,4-diones 的合成是通过碱基促进的裂解然后环化完成的。通过两种互补的方法制备了各种饱和环稠合双环乌拉唑:通过N , N'-双(2-氯乙基)乌拉唑与各种亲核试剂或使用 4-取代的乌拉唑和二溴烷烃。在 –78 °C 至 25 °C 下用 LDA 处理这些对称的乌拉唑衍生物导致 N-N 键断裂形成亚胺,亚胺经历分子内环化,导致具有不对称(外消旋)中心的非对称杂环衍生物的中等产率和各种戒指尺寸。这些转化的效用扩展到包含额外杂原子的三环系统和双环系统的合成。