Patent ID: 9000205
Filing Date: 2015-04-07
Classification: C07C,C07D,C07F

Abstract:
1. Process for the preparation of an ester of 2-cyanophenylboronic acid of formula (II): wherein R 1 and R 2 are independently linear or branched C 1 -C 6 alkyl groups or are joined to form a cycle containing between 1 and 6 possibly substituted carbon atoms, comprising: (a) converting a 2-halogenbenzonitrile of formula (IV):  wherein X is selected from the group consisting of chlorine, bromide and iodine, in a 2-cyanophenyl magnesium halide lithium chloride complex of formula (III): (b) converting the compound obtained in step (a) to give the compound of formula (II).