Process for the preparation of 2-chloroethanephosphonic...

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

C - Chemistry, Metallurgy

07

F

260/537.8

C07F 9/42 (2006.01)

Patent

CA 1304404

HOE 86/F 225 ABSTRACT OF THE DISCLOSURE The invention relates to a process for the preparation of 2-chloroethanephosphonic dichloride through reaction of a 2-chloroethanephosphonate of the formula Image or Image or a mixture of the two esters, with thionyl chloride at a temperature of 60 to 160°C. In this reaction, tertiary phosphines, quaternary ammonium or phosphonium salts or alkali metal or alkaline-earth 0etal halides are employed as catalysts. The thionyl chloride is introduced into the initially introduced ester.

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