Patent ID: 7728139
Filing Date: 2010-06-01
Classification: C07D,C09B

Abstract:
1. A process for the preparation of a compound of formula III wherein both M represent an alkali metal and each of R which process comprises the steps of: providing to a reactor as reactants an unsymmetrical or symmetrical dialkyl or diaryl succinate, or monoalkyl monoaryl succinate or dicycloalkyl succinate of formula V wherein each R for at least each mole of succinate or with 0.0 to 2.0 mole of a nitrile of the formula (VI) and 2.0 to 0.0 mole of the nitrile of the formula (VII), and further, providing 2 to 5 moles of a strong base at a temperature of 20° C.-25° C., then subsequently reacting the said reactants in the presence of the strong base and essentially in the absence of any organic solvent to condense the reactants at a temperature of 70° C. to 200° C.