Process for the preparation of 2-chloroethanephosphonyl dichlori

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

1987-12-01

1989-08-08

Killos, Paul J.

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

Organic compounds

Phosphorus halides

C07F 942

Patent

active

048550876

ABSTRACT:
The invention relates to a process for the preparation of 2-chloroethanephosphonyl dichloride by reaction of an ester of 2-chloroethanephosphonic acid of the formula ##STR1## or a mixture of the two esters with thionyl chloride at a temperature of 60.degree. to 160.degree. C. Phosphine oxides are employed as catalysts therein. The thionyl chloride is added to the initially introduced ester.

REFERENCES:
patent: 3183264 (1965-05-01), Rochlitz et al.
patent: 3574735 (1971-04-01), Sennewald et al.
patent: 3972923 (1976-08-01), Finke et al.
patent: 4213922 (1980-07-01), Maier
patent: 4735748 (1988-04-01), Pieper

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