Patent ID: 8258335

Claim:
Process for preparing a 2-dihaloacyl-3-aminoacrylic ester of formula (I) in which R 1 and R 2 are each independently selected from C 1-12 -alkyl radicals, C 5-18 -aryl, C 7-19 -alkylaryl and C 7-9 -arylalkyl radicals, or R 1 and R 2 , together with the nitrogen atom to which they are bonded, may form a 5- to 6-membered ring which may optionally contain one or two further heteroatoms selected from 0, S and an SO 2 group, Y is selected from (C═O)OR 3 , CN and (C═O)NR 4 R 5 , where R 3 , R 4 and R 5 are each independently selected from C 1-12 -alkyl radicals, C 5-18 -aryl, C 7-19 -alkylaryl and C 7-19 -arylalkyl radicals, and R 4 and R 5 , together with the nitrogen atom to which they are bonded and/or further atoms which are selected from C, N, O and S, may form a five- or six-membered ring which may be substituted by C 1-6 -alkyl radicals; and X 1 and X 2 are each independently fluorine, chlorine, bromine and iodine, said process comprising reacting an acid fluoride of formula (II) with a 3-aminoacrylic acid derivative of formula (III) wherein the reaction is effected in the absence of a base.