Electrochemical synthesis of diethyl fluoromethanephosphonate
摘要:
The electrochemical reduction of diethyl chlorofuloromethanephosphonate has been studied. It has been shown that, in mildly basic media (pH 7.5-8) of water-alcohol solutions, replacement of the chlorine of the starting compound by hydrogen occurs at lead, cadmium and zinc electrodes with high selectivity. The procedure affording diethyl fluoromethanephosphonate in a yield of 85%-90% has been elaborated. (C) 1997 Elsevier Science S.A. All rights reserved.
Syntheses of some fluorine-containing halomethanephosphonate and methylenebisphosphonate esters
作者:G.Michael Blackburn、Graham E. Taylor
DOI:10.1016/0022-328x(88)80339-5
日期:1988.6
The Michaelis-Becker reaction between diethyl sodiophosphite and either of the halofluoromethanes CF2Cl2 and CF3Br gives tetraethyl difluoromethylenebisphosphonate. By contrast, the corresponding reaction with CFCl3 gives not only diethyl dichlorofluoromethanephosphonate but also tetraethyl pyrophosphate as the major product. Diethyl dichlorofluoromethanephosphonate, readily prepared by a normal Arbusov
The phosphorus trichloride–oxygen–olefin reaction: conformation and elimination studies on products derived from 1-chloro-2-fluoro- and 1,2-difluoro-ethylene
作者:Clive B. C. Boyce、Shirley B. Webb、Lawrence Phillips、Ian R. Ager
DOI:10.1039/p19740001644
日期:——
The reaction of phosphorus trichloride and oxygen with fluoro-olefins gives mixtures containing phosphoric and phosphonic dichlorides together with C–C cleavage products. In a wide range of compounds of the type (RO)2P-(O)·CHX·CHYCl, including productsderivedfrom these reactions, elimination of HCl occurs stereospecifically or stereoselectively, and in the case of pairs of diastereoisomers stereoconvergently
三氯化磷和氧气与氟代烯烃的反应生成的混合物含有磷酸二氢膦和膦二膦以及CC裂解产物。在各种各样的(RO)2 P-(O)·CHX·CHYCl类型的化合物中,包括从这些反应中衍生的产物,HCl的立体定向或立体选择性消除,在成对的非对映异构体对中会聚。带有X和Y顺式的烯烃(RO)2 P(O)-CX CHY 。有人建议通过1 H和19 F nmr研究确定的基态构象性质与观察到的HCl消除方式之间的相关性。
Convenient method for the synthesis and some transformations of the lithium salt of bis(diethoxyphosphoryl)fluoromethane
作者:B. I. Martynov、V. B. Sokolov、A. Yu. Aksinenko、T. V. Goreva、T. A. Epishina、A. N. Pushin
DOI:10.1007/bf02494511
日期:1998.10
A convenient method was developed for the synthesis of the lithium salt of 1,1-bis(diethoxyphosphoryl)fluoromethane from availableO,O-diethyl (chlorofluoromethyl)phosphonate, and some transformations of the resulting salt were studied.