| 摘要 |
A process for the preparation of alkyl esters of alkenylphosphinic acid, having the general formula I <IMAGE> (I) wherein R1 represents H or CH3, R2 alkyl having from 1 to 4 carbon atoms or phenyl and R3 alkyl having from 1 to 8 carbon atoms, which comprises cleaving an alkyl ester of 2-acetoxyethyl phosphinic acid, having the general formula II <IMAGE> (II) wherein R1, R2 and R3 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 <IMAGE> (I) wherein (a) R1 represents H, R2 represents alkyl having from 1 to 4 carbon atoms or phenyl and R3 represents isobutyl or alkyl having from 5 to 8 carbon atoms, or (b) R1 represents CH3, R2 represents alkyl having from 1 to 4 carbon atoms or phenyl and R3 represents alkyl having from 1 to 8 carbon atoms.
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