Isolation, Reactivity and Intramolecular Trapping of Phosphazide Intermediates in the Staudinger Reaction of Tertiary Phosphines with Azides
作者:M Desamparados Velasco、Pedro Molina、Pilar M Fresneda、Miguel A Sanz
DOI:10.1016/s0040-4020(00)00322-7
日期:2000.6
The Staudinger reaction of the N-substituted o-azidobenzamide 1 with triphenylphosphine or diphenylmethylphosphine allows the isolation of the intermediate phosphazides as crystalline solids, which have been characterized by spectroscopic methods. These compounds react in aza Wittig type fashion with isocyanates to give unexpectedly the corresponding 1,2,3-benzotriazinone derivative. Trapping of a
N-取代的邻叠氮基苯甲酰胺1与三苯基膦或二苯基甲基膦的史陶丁格反应使得可以分离中间体磷叠氮化物为结晶固体,其已通过光谱法表征。这些化合物以氮杂维蒂希型与异氰酸酯反应,出乎意料地得到相应的1,2,3-苯并三嗪酮衍生物。首次报道了通过分子内氮杂Wittig反应捕获Z-磷叠氮化物。