Process for the preparation of vinylphosphonic acid dichloride a

Details Process for the preparation of vinylphosphonic acid dichloride a Process for the preparation of vinylphosphonic acid dichloride a

1983-02-04

1985-10-22

Moyer, Donald B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2605024R, C07R 942

Patent

active

045487626

ABSTRACT:
A process for the preparation of vinylphosphonic acid dichloride and 2-chloroethanephosphonic acid dichloride, wherein 2-chloroethanephosphonic acid derivatives containing 2-chloroethyl ester groups, as produced in the Arbusow rearrangement of tris-chloroethyl phosphite, are heated to 150.degree. to 230.degree. C. in a first stage, and, in a second stage, the residual reaction mixture is reacted with phosgene at 90.degree.-200.degree. C., in the presence of basic catalysts or of alkali metal salts as catalysts, and in the presence of phosphonic acid dichlorides.

REFERENCES:
patent: 3950413 (1976-04-01), Finke et al.
patent: 4013715 (1977-03-01), Finke et al.
patent: 4069247 (1978-01-01), Kleiner

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