Patent ID: 7601864
Filing Date: 2009-10-13
Classification: C07C

Abstract:
1. A method for synthesizing 4,4-dihalogen-2-(dialkylamino) methylene-3-oxy-alkylbutyrate denoted by formula 3 and its derivatives comprising acts of: (a) providing N,N-dialkylamino-alkyl-acrylate denoted by formula 2 in a reaction vessel; (b) adding organic base, organic solvent and molecular sieves to the reaction vessel; (c) mixing N,N-dialkylamino-alkyl-acrylate, the organic base, the organic solvent and the molecular sieves; and (d) adding 2,2-dihalogen-acetyl-chloride denoted by formula 1 into the reaction vessel for allowing a synthetic reaction; wherein R R (e) performing solvent extraction after the step of (d) comprising (f) filtering the alkyl solvent with the crude product to obtain a filtrate and drying the filtrate to obtain a product containing 4,4-dihalogen-2-(dialkylamino) methylene-3-oxy-alkylbutyrate and its derivatives.