Patent ID: 7141695

Claim:
A process for the production of substituted acrylic acid esters of the formula II, in which R denotes a linear or branched, saturated or unsaturated aliphatic C 1-3 group, R 1 denotes hydrogen or a linear or branched, saturated aliphatic C 1-6 group and R 2 denotes a linear or branched, saturated aliphatic C 1-6 group, or R 1 and R 2 together form a saturated hydrocarbon chain with the formation of a 3–8-membered cycloaliphatic ring, characterised in that a ketone or an aldehyde of the formula V, in which R 1 and R 2 have the above-stated meaning, is combined with trialkyl phosphonoacetate of the formula VI, in which R denotes a linear or branched, saturated or unsaturated aliphatic C 1-3 group, and alkali metal carbonate as base in an aqueous solvent at a temperature in the range from 0 to 10° C. and reacted at a temperature in the range of ≦25° C.