Patent ID: 8669392
Filing Date: 2014-03-11
Classification: C07C

Abstract:
1. A process for preparation of a compound of formula (I), comprising: (i) reacting a compound of formula (II) with at least one metal alkoxide in at least one alcohol solvent; (ii) removing the alcohol solvent to obtain a concentrate; (iii) dissolving the concentrate obtained in (ii) in at least one aprotic solvent, and then reacting it with a compound of formula (III), wherein, R 1 and R 2 are independently selected from linear and branched C 1 to C 20 alkyl, C 3 to C 20 cycloalkyl, C 4 to C 20 alkylcycloalkyl, C 4 to C 20 cycloalkylalkyl, C 6 to C 20 aryl, C 7 to C 20 alkaryl and C 7 to C 20 aralkyl; and R is independently selected from C 3 to C 6 isoalkyl, C 3 to C 6 sec-alkyl and C 3 to C 6 cycloalkyl.