abstract |
The present invention relates to the improved process for the preparation of Anastrozole free from the impurities arising due to impure 3,5-bis-(l-cyano-l- methylethyl)benzylbromide (2) and other related impurities resulting from incomplete/over-reaction of 2,2-(5-methyl-l,3-phenylene)-bis(2-methylpropionitrile (I)- |