rearrange into phosphinyl or thiophosphinyl guanidines, with the nitrogen atoms not linked to the phosphorus non-, mono- or disubstituted. 1H NMR and 31P NMR investigations show that these molecules are present in solution under only one tautomeric form, for which two isomers are detectable at low temperatures. The extension to the synthesis of phosphonio guanidines, starting from N-cyanophosphinimines Ph3PNCN
二苯基氰基氨基次膦酸钠Na [Ph 2 P(X)NCN](X = O,S)与烷基或芳基氯化铵[RNH 3 ] Cl反应,得到相应的铵盐。它们重排成膦酰基或硫代膦酰基胍,其中氮原子不与未取代,单取代或二取代的磷连接。1 H NMR和31 P NMR研究表明,这些分子仅以一种互变异构形式存在于溶液中,在低温下可检测到两种异构体。从N-氰基膦亚胺Ph 3 PNCN或Ph 2开始,扩展了膦酰胍的合成(RNH)PNCN,显示了该方法的广泛应用领域。而且,这些胍,在此所描述的几个已知实例基本上是N-二取代的磷胍,在农业和医药领域具有令人感兴趣的潜力。
A Facile Synthesis of New Thiophosphinyl Guanidines
作者:L. Jäger、N. Inguimbert、M. Taillefer、H. J. Cristau
DOI:10.1080/00397919508011833
日期:1995.9
Abstract Sodium thiophosphinyl cyanamide Na[Ph2P(S)NCN] reacts with aryl-and alkylammonium chlorides [RNH3]Cl under mild conditions to the corresponding aryl- or alkylammonium thiophosphinyl cyanamides, which rearrange to N-aryl(alkyl)-N′-thiophosphinyl guanidines in a Wohler's type reaction.