The present invention relates to a process for preparing halogenated pyridine derivatives of the formula (II) proceeding from compounds of the structure Q-H via intermediates of the formula (IIIa) or (IIIb)
in which
Q is a structural element
where the symbol # indicates the bond to the rest of the molecule and A, Q
1
, Q
2
, Q
3
, Q
4
, Q
5
and Q
6
have the definitions given in the description,
W is halogen,
Y is halogen, CO
2
R
1
or NO
2
, where R
1
is (C
1
-C
6
)-alkyl or (C
1
-C
6
)-haloalkyl, and
R
2
is halogen or —O-pivaloyl.
本发明涉及一种制备卤代
吡啶衍生物的方法,其公式为(II),该方法从结构为Q-H的化合物出发,通过中间体(IIIa)或(IIIb)进行。其中,Q是结构元素,符号“#”表示与分子的其余部分的键,A,Q1,Q2,Q3,Q4,Q5和Q6在说明中给出了定义,W为卤素,Y为卤素,CO2R1或
NO2,其中R1为(C1-C6)-烷基或(C1-C6)-卤代烷基,R2为卤素或-O-戊二酰基。