Process for making vinylphosphonic acid or vinylpyrophosphonic a

Details Process for making vinylphosphonic acid or vinylpyrophosphonic a Process for making vinylphosphonic acid or vinylpyrophosphonic a

1984-02-21

1984-12-04

Evans, J. E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260545P, C07F 938

Patent

active

044863578

ABSTRACT:
The disclosure relates to process for making derivatives of vinylphosphonic acid or vinylpyrophosphonic acid. To this end, a ketone is reacted with tetraphosphorus hexoxide in the presence of catalytic proportions of a proton-yielding substance. In the event of the products desired to be produced being vinylphosphonic acid derivatives, the vinylpyrophosphonic acid derivatives first obtained are hydrolyzed with an equivalent quantity of water.

REFERENCES:
patent: 2230371 (1941-02-01), Bolton
patent: 2254124 (1941-08-01), Stevens et al.
patent: 2279501 (1942-04-01), Dickey et al.
patent: 2365466 (1944-12-01), Hamilton
patent: 2686803 (1954-08-01), Stayner
patent: 2693482 (1954-11-01), Stayner
patent: 2694684 (1954-11-01), Rogers et al.
Houben-Weyl, Methoden der Organischen Chemie, 4th Edition, vol. XII/I, Part 1 ("Organic Phosphorus Compounds"), Georg Thieme Verlag., Stuttgart, 1963, pp. 363, 364, 374.

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