Process for making derivatives of vinylphosphonic acid or vinylp

Details Process for making derivatives of vinylphosphonic acid or vinylp Process for making derivatives of vinylphosphonic acid or vinylp

1984-06-15

1985-07-16

Evans, J. E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07F 938

Patent

active

045295590

ABSTRACT:
The disclosure relates to a process for making derivatives of vinylphosphonic acid or vinylpyrophosphonic acid by reacting a ketone with phosphorus trichloride in the presence of phosphorous acid by using the ketone, phosphorous acid and phosphorus trichloride in a molar ratio of 2:1:1, 1 mol phosphorous acid being replaceable by a further mol phosphorus trichloride and 3 mols water.

REFERENCES:
patent: 2254124 (1941-08-01), Stevens et al.
patent: 2694684 (1954-11-01), Rogers et al.

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