PROCESS FOR THE PREPARATION OF 2-(3,6-DIHALOPYRIDIN-2-YL)-3H-IMIDAZOL4,5-CPYRIDINE DERIVATIVES AND RELATED COMPOUNDS BY REACTING THE 3H-IMIDAZOL4,5-CPYRIDINE DERIVATIVE WITH A METAL-ORGANIC ZINC-AMINE BASE

摘要

The invention relates to a method for producing halogenated pyridine derivatives of formula (II) from compounds of the Q-H structure via intermediate steps of formula (IIIa) or (IIIb) in which Q is a structural element, where the character # indicates the binding to the radical of the molecule and A, Q1, Q2, Q3, Q4, Q5 and Q6 have the designations provided in the description, W is halogen, and Y is halogen, CO2R1 or NO2, where R1 is (C1-C6) alkyl or (C1-C6) haloalkyl, and R2 is halogen or -O-pivaloyl.