| abstract |
The present invention relates to a process for the preparation of halogenated pyridine derivatives of formula (II) via intermediates of formula (IIIa) or (IIIb) starting from compounds of formula (I) In the above formulas, the radicals Q and W are each independently halogen, R 2 is halogen or -O-pivaloyl and Y is halogen, CO 2 R 1 or NO 2 , wherein R 1 is (C 1 -C 6) a haloalkyl-alkyl or (C 1 -C 6). |