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

1983-03-04

1985-03-26

Evans, J. E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2605024P, C07F 938

Patent

active

045072493

ABSTRACT:
The disclosure relates to a process for making derivatives of vinylpyrophosphonic acid, wherein a ketone is reacted with tetraphosphorus hexoxide (P.sub.4 O.sub.6) in the presence of a catalytically active proportion of a proton-yielding substance at elevated temperature. Vinylphosphonic acid derivatives are obtained by hydrolyzing the vinylpyrophosphonic acid derivatives with an equivalent proportion of water. More particularly, the ketone used is a compound of the following general formula ##STR1## in which either R stands exclusively for a halogen and R' either stands for a halogen or hydrogen, a halogen-substituted or unsubstituted alkyl, aryl, alkaryl or aralkyl group having from 1 to 18 carbon atoms, and R" stands for an alkyl, aryl, alkaryl, aralkyl or alkenyl group having from 1 to 18 carbon atoms, or R" stands exclusively for an alkenyl group having from 2 to 18 carbon atoms and R and R' being identical or different each stand for hydrogen or a halogen or a halogen-substituted or unsubstituted alkyl, aryl, alkaryl or aralkyl group having from 1 to 18 carbon atoms.

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.
patent: 4388252 (1983-06-01), Dursch et al.

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