Process for the preparation of alkyl alkenylphosphinates

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

C - Chemistry, Metallurgy

07

F

260/458.8

C07F 9/32 (2006.01)

Patent

CA 1338987

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 is disclosed. The process comprises cleaving an alkyl ester of 2- acetoxyethyl phosphinic acid, having the general formula II Image (II) 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 process can be easily carried out in an industrial scale, especially in the continuous mode. Alkenylphosphinic acid esters are useful as intermediates for the preparation of other products having various industrial applications.

591405

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