The present invention relates to a process for producing 2-cyanoacetic acid anhydride, comprising the steps of a) preparing a reaction mixture, containing as reactants 2-cyanoacetic acid, and at least one C4-20 carboxylic acid anhydride in at least one organic solvent, wherein the molar ratio of 2-cyanoacetic acid to C4-20 carboxylic acid anhydride in said reaction mixture is greater than 1.5:1, and b) subjecting the reaction mixture to a temperature of 0°C to 100°C to form 2-cyanoacetic acid anhydride. The present invention also relates to process for producing 2-cyanoacetic acid esters, 2-cyanoacetic acid amides and/or 2-cyanoacetic acid thioesters from 2-cyanoacetic acid anhydride.
本发明涉及一种生产2-
氰基
乙酸酐的方法,包括以下步骤:a)准备反应混合物,其中包含2-
氰基
乙酸和至少一种C4-20
羧酸酐在至少一种有机溶剂中作为反应物,在所述反应混合物中2-
氰基
乙酸与C4-20
羧酸酐的摩尔比大于1.5:1;b)将反应混合物置于0°C至100°C的温度下形成2-
氰基
乙酸酐。本发明还涉及一种从2-
氰基
乙酸酐生产2-
氰基
乙酸酯、2-
氰基
乙酸酰胺和/或2-
氰基
乙酸硫酯的方法。