Process for the preparation of 2-chloroethanephosphonic dichlori

Details Process for the preparation of 2-chloroethanephosphonic dichlori Process for the preparation of 2-chloroethanephosphonic dichlori

1987-08-27

1988-06-07

Killos, Paul J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2605024R, C07F 942

Patent

active

047495243

ABSTRACT:
The invention relates to a process for the preparation of 2-chloroethanephosphonic dichloride through reaction of a 2-chloroethanephosphonate of the formula ##STR1## or a mixture of the two esters, with thionyl chloride at a temperature of 60.degree. to 160.degree. C. In this reaction, tertiary phosphines, quaternary ammonium or phosphonium salts or alkali metal or alkaline-earth metal halides are employed as catalysts. The thionyl chloride is introduced into the initially introduced ester.

REFERENCES:
patent: 3890382 (1975-06-01), Hofer et al.

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