Patent ID: 7078571

Claim:
A process for preparing, 1,3-di-halo-substituted benzene derivatives (II) from 2,6-di-halo-substituted benzaldehydes (I) (where X 1 , X 2 are each independently F, Cl, Br, and R 1 , R 2 , R 3 are each independently H, halogen, OH, C 1 –C 12 -alkyl, CF 3 , CHO, C 6 –C 14 -aryl, Oalkyl, Oaryl, NO 2 ) by reacting with an alkaline medium, which comprises initially charging the alkaline medium and metering in the 2,6-di-halo-substituted benzaldehyde (I) or initially charging the 2,6-di-halo-substituted benzaldehyde (I) and metering in the alkaline medium