Process for the preparation of alkyl alkenylphosphinates

Details Process for the preparation of alkyl alkenylphosphinates Process for the preparation of alkyl alkenylphosphinates

1989-02-16

1990-10-02

Shah, Mukund J.

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

Organic compounds

Phosphorus esters

558207, C07F 940

Patent

active

049609190

ABSTRACT:
A process for the preparation of alkyl esters of alkenylphosphinic acid, having the general formula I ##STR1## wherein R.sup.1 represents H or CH.sub.3, R.sup.2 alkyl having from 1 to 4 carbon atoms or phenyl and R.sup.3 alkyl having from 1 to 8 carbon atoms, which comprises cleaving an alkyl ester of 2-acetoxyethyl phosphinic acid, having the general formula II ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 have the meaning indicated above, in contact with a liquid catalytically acting medium and at a partial pressure of the total of the components of the reaction system in the range of from 1 to 500 mbar, and drawing off the resulting alkyl esters of alkenyl phosphinic acid and other volatile reaction products.
The invention also relates to compounds of the formula I ##STR3## wherein (a) R.sup.1 represents H, R.sup.2 represents alkyl having from 1 to 4 carbon atoms or phenyl and R.sup.3 represents isobutyl or alkyl having from 5 to 8 carbon atoms, or

REFERENCES:
Kabachnik et al., "Chem. Abstracts", vol. 58, (1963) #9126g.
Kamai et al., "Chem. Abstracts", vol. 54, (1960) #7538g.

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