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.
一种合成4,4-二卤代-2-(二烷基氨基)亚甲基-3-氧基-烷基丁酸酯及其衍生物的方法包括以下步骤:(a)在反应容器中提供N,N-二烷基氨基-烷基-丙烯酸酯;(b)向反应容器中加入有机碱、有机溶剂和多种分子筛;(c)混合N,N-二烷基氨基-烷基-丙烯酸酯、有机碱、有机溶剂和分子筛;(d)向反应容器中加入2,2-二卤代-乙酰氯,使2,2-二卤代-乙酰氯和N,N-二烷基氨基-烷基-丙烯酸酯发生合成反应,得到4,4-二卤代-2-(二烷基氨基)亚甲基-3-氧基-烷基丁酸酯。分子筛能有效去除水分,防止反应容器中的物质发生副反应或改变化学性质。此外,分子筛能吸附氯化物,避免聚合反应,提高产率。