[DE] VERFAHREN ZUM HERSTELLEN VON 2-DIHALOGENACYL-3-AMINO-ACRYLSÄUREESTERN UND 3-DIHALOGENMETHYL-PYRAZOL-4-CARBONSÄUREESTERN [EN] METHOD FOR PRODUCING 2-DIHALOACYL-3-AMINO-ACRYLIC ACID ESTERS AND 3-DIHALOMETHYL-PYRAZOLE-4-CARBOXYLIC ACID ESTERS [FR] PROCEDE DE PRODUCTION D'ESTERS D'ACIDE 2-DIHALOGENO-ACYL-3-AMINO-ACRYLIQUE ET D'ESTERS D'ACIDE 3-DIHALOGENO-METHYL-PYRAZOL-4-CARBOXYLIQUE
PROCESS FOR PREPARING 2-DIHALOACYL-3-AMINOACRYLIC ACID DERIVATIVES
申请人:Pazenok Sergii
公开号:US20100204483A1
公开(公告)日:2010-08-12
The present invention relates to a process for preparing hydrochloride-free 2-dihaloacyl-3-aminoacrylic esters by reacting acid fluorides with dialkylaminoacrylic acid derivatives.
Method for synthesizing 4,4-dihalogen-2-(dialkylamino)methylene-3-oxy-alkylbutyrate and derivatives thereof
申请人:UFC Corporation
公开号:US07601864B1
公开(公告)日:2009-10-13
A method for synthesizing 4,4-dihalogen-2-(dialkylamino)methylene-3-oxy-alkylbutyrate and its derivatives has acts of: (a) providing N,N-dialkylamino-alkyl-acrylate in a reaction vessel; (b) adding organic alkali, organic solvent and multiple molecular sieves into the reaction vessel; (c) mixing N,N-dialkylamino-alkyl-acrylate, the organic alkali, the organic solvent and the molecular sieves; and (d) adding 2,2-dihalogen-acetyl-chloride into the reaction vessel and allowing a synthetic reaction of 2,2-dihalogen-acetyl-chloride and N,N-dialkylamino-alkyl-acrylate to obtain 4,4-dihalogen-2-(dialkylamino)methylene-3-oxy-alkylbutyrate. The molecular sieves are able to remove water efficiently to prevent materials in the reaction vessel from undergoing side reactions or changing chemical properties. Furthermore, the molecular sieves are able to adsorb chloride to avoid polymerization reactions for improved yield.