A Rare Example of a Rearrangement Involving Four Structural Isomers: -Phosphinonitrile/C-Phosphinoketenimine/1-Aza-4-phosphabutadiene/ 1,2-Dihydro-1,2-azaphosphete
作者:Déborah Amsallem、Stéphane Mazières、Valérie Piquet-Fauré、Heinz Gornitzka、Antoine Baceiredo、Guy Bertrand
DOI:10.1002/1521-3765(20021202)8:23<5305::aid-chem5305>3.0.co;2-6
日期:2002.12.2
)-carbene (1) reacts with dimethyl cyanamide to afford the original 1,2-dihydro-1,2-azaphosphete 4a (51% yield). The surprising formation of this heterocycle involves the transient formation of a nitrile, a keteneimine, and a 1-aza-4 lambda 3-phosphabutadiene derivative. By using substituent effects and different synthetic routes, all of these structural isomers have been isolated.
稳定的化合物[双(二环己基氨基)膦基](三甲基甲硅烷基)-卡宾(1)与二甲基氰胺反应,得到原始的1,2-二氢-1,2-氮杂磷4a(收率51%)。该杂环的惊人形成涉及腈,烯酮亚胺和1-氮杂-4λ3-磷丁二烯衍生物的瞬时形成。通过使用取代基效应和不同的合成途径,已分离了所有这些结构异构体。