Patent ID: 9309190
Filing Date: 2016-04-12
CPC Classification: C07C

Claim Text:
1. A process for preparing 2,3-dicyanopropionic acid ester of formula (I); said process comprising the following steps: i) providing a slurry of sodium cyanide in a solvent and reacting with a solution of 2-cyano-2-propenoic acid ester of formula (II) which is pre-stabilized using a stabilizing agent 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); wherein, R is selected from the group consisting of C R 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), wherein, R is selected from the group consisting of C R R