Process for the synthesis of diethyl ethylphosphonate

Details Process for the synthesis of diethyl ethylphosphonate Process for the synthesis of diethyl ethylphosphonate

1995-01-10

1995-12-05

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus esters

558214, C07F 940

Patent

active

054730937

ABSTRACT:
Diethyl ethylphosphonate is formed by the catalytic rearrangement of triethyl phosphite in a reaction medium at elevated temperature, preferably using an ethyl iodide as the rearrangement catalyst, employing a heel of diethyl ethylphosphonate in the reaction medium when the reaction is begun with maintaining of the reaction medium at a temperature above the boiling point of the triethyl phosphite (for example, a temperature of from about 175.degree. C. to about 185.degree. C.) and addition of the triethyl phosphite to the reaction medium at a rate slow enough to maintain that temperature.

REFERENCES:
patent: 4311652 (1982-01-01), Abramson et al.
"The Reaction Between Trialkyl Phosphites and Alkyl Halides", by A. H. Ford-Moore, Journal of the Chemical Society, 1947, pp. 1465-1467.
"Esters Containing Phosphorus. Part V. Esters of Substituted Phosphonic and Phosphonous Acids.", by B. C. Saunders et al., Journal of the Chemical Society, 1948, Part I, pp. 699-703.
"Diisopropyl Methylphosphonate", submitted by A. H. Ford-Moore, Organic Syntheses, Collective vol. 4, John Wiley & Sons, Inc., 1963, pp. 325-327.
"A Kinetic Study of Michaelis-Arbuzov Reactions", by G. Aksnes et al., Acta Chemica Scandinavica, 18 (1964), 38-46.
"Carbanions Phosphonates .alpha.-Lithies: Synthese, Basicite Comparee et Stabilite A L'Autocondensation", by M.-P. Teulade et al., Journal of Organometallic Chemistry, 312 (1986) 283-295.

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