Process for preparing vinyl-phosphonic acids

Details Process for preparing vinyl-phosphonic acids Process for preparing vinyl-phosphonic acids

1997-05-16

1998-09-22

Geist, Gary

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

Organic compounds

Phosphorus acids or salts thereof

562 20, C07F 938

Patent

active

058115757

ABSTRACT:
The present invention relates to a process for preparing vinylphosphonic acids of the formula ##STR1## in which m is an integer from 1 to 20 by heating 2-chloroethylphosphonic acids of the formula ##STR2## in which n is an integer equal to or smaller than m, if desired in the form of a solution, in the absence or presence of a catalyst to a temperature of 180 to 350.degree. C. and eliminating hydrogen chloride and, where appropriate, water under atmospheric pressure or reduced pressure and, if desired, hydrolysing the vinylphosphonic acids of the formula (I).

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patent: 4486357 (1984-12-01), Krause et al.
patent: 5132444 (1992-07-01), Nothemann et al.
CA:120: 134678 Mechanism of Phosphorylation Reaction of 2 Haloalkylphosphonic Acids., Segall Phos, Sulf. Silicon. Rel. 75(1-4) 191-4 1993.
CA 69 19307--Prep of Vinyl Phosphic Acid Anhydride. Abst SU 193508 1967, Mar., 13.
CA 117:69933 Synthesis P31 & C13 NMR Studies of Pyrophosphonic Acids Ohms, Phos Sulf. Silic Relat El 68(1-4) 77-89 1992.
CA 96:52500 Vinyl Phosphonic Acid Der. Kleiner Abst. DE 3014737 Oct. 22, 1981.
CA 95:187421 Vinyl Phosphonic Acid Derivatives Duerseh Abst of DE 3001894--1981.
Morrison & Boyd, "Organic Chemistry," Allyn and Bacon, Inc., Boston (1973), p. 157.
Lowry & Richardson, "Mechanism and Theory in Organic Chemistry," Harper & Row, New York (1981), pp. 530-531.
March, "Advanced Organic Chemistry," John Wiley & Sons, New York (1985), pp. 914-915.
European Search Report No. 95106241.3, Feb. 7, 1995.

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