A diethylzinc-air system is established to enable an unconventional diazo-retaining nucleophilic addition reaction of trifluorodiazoethane and diazoacetate with 2H-azirines. This transformation converted a broad range of cyclic 2H-azirines to valuable acyclic α-diazo amines in good yields. Further synthetic transformations provide access to β-CF3 amines, β-CF3-enamines, and CF3-oxazolines. Preliminary
建立了
二乙基锌-空气体系,以实现三
氟重氮乙烷和
重氮乙酸酯与 2 H-
氮杂环丙烷的非常规保留重氮基的亲核加成反应。这种转化以良好的产率将范围广泛的环状 2 H-氮
杂环化合物转化为有价值的无环 α-重氮胺。进一步的合成转化提供了获得 β-CF 3胺、β-CF 3 -烯胺和 CF 3 -
恶唑啉的途径。初步的机理研究表明,分子氧在实现这种自由基引发的反应中起着至关重要的作用,涉及原位生成的
亚胺作为关键中间体。