abstract |
The present invention relates to the improved process for the preparation of 3,5-bis-(1-cyano-1-methylethyl)benzylbromide free from impurities such as 2,2-(5-methyl-1,3-phenylene)-bis(2-methylpropionitrile) and 3,5-bis(1-cyano-1-methylethyl)-α,α-diibromotoluene. |