申请人:Lonza Ltd.
公开号:US04801750A1
公开(公告)日:1989-01-31
Process for the production of 2-chloroacetoacetic acid amides. Diketene is converted at a temperature of +30.degree. to -40.degree. C. with the help of hydrogen chloride into acetoacetic acid chloride. Chlorine is introduced into the mixture at a temperature of +30.degree. to -40.degree. C., whereby 2-chloroacetoacetic acid chloride is formed. The latter is converted into the corresponding amide at a temperature of +50.degree. to -40.degree. C. by reaction with a N-compound having the formula: ##STR1## wherein (i) R=R'=H, or (ii) R=R'=alkyl, substituted alkyl, aryl, substituted aryl, alkyl aryl, substituted alkyl aryl, alkoxy aryl, substituted alkoxy aryl, alkoxy alkyl or substituted alkoxy alky, or (iii) R=H, and R'=alkyl, substituted alkyl, aryl, substituted aryl, alkyl aryl, substituted alkyl aryl, alkoxy aryl, substituted alkoxy aryl, alkoxy alkyl or substituted alkoxy alkyl.
生产2-氯乙酰乙酸酰胺的过程。二酮在+30℃至-40℃的温度下,通过氯化氢的帮助转化为乙酰乙酸氯。在+30℃至-40℃的温度下向混合物中引入氯气,从而形成2-氯乙酰乙酸氯。后者通过与具有以下公式的N-化合物反应,在+50℃至-40℃的温度下转化为相应的酰胺:##STR1## 其中(i) R=R'=H,或(ii) R=R'=烷基,取代烷基,芳基,取代芳基,烷基芳基,取代烷基芳基,烷氧基芳基,取代烷氧基芳基,烷氧基烷基或取代烷氧基烷基,或(iii) R=H,且R'=烷基,取代烷基,芳基,取代芳基,烷基芳基,取代烷基芳基,烷氧基芳基,取代烷氧基芳基,烷氧基烷基或取代烷氧基烷基。