申请人:GHARDA Keki Hormusji
公开号:US20140051881A1
公开(公告)日:2014-02-20
The present disclosure provides a process for preparing 2,3-dicyanopropionic acid ester of formula (I); said process comprising the following steps: i) treating an alkali metal cyanide dissolved in a solvent with a solution of 2-cyano-2-propenoic acid ester of formula (II) at a temperature ranging between 0° C. and 50° C. for a time period ranging between 2 hours and 15 hours followed by cooling below 20° C. to obtain a sodium salt of 2,3-dicyanopropionic acid ester of formula (I); and
ii) neutralizing the sodium salt of 2,3-dicyanopropionic acid ester using a neutralizing agent to obtain a 2,3-dicyanopropionic acid ester of formula (I),
本公开提供了制备式(I)的2,3-二氰基丙酸酯的方法;该方法包括以下步骤:i)将溶解在溶剂中的碱金属氰化物与式(II)的2-氰基-2-丙烯酸酯的溶液在0℃至50℃的温度范围内反应2小时至15小时,然后冷却至20℃以下,以获得式(I)的2,3-二氰基丙酸酯的钠盐;和ii)使用一种中和剂中和2,3-二氰基丙酸酯的钠盐,以获得式(I)的2,3-二氰基丙酸酯。