| abstract |
The present invention relates to a new process for the preparation of substituted 2-chloropyridine derivatives of general formula (I).n n n n n n n n Wherein R 1 is hydrogen, fluorine, chlorine, cyano, carbalkoxy (C 1 -C 4 ) or Wherein R 5 and R 6 are the same or different and represent hydrogen or alkyl (C 1 -C 4 ), and R 2 represents hydrogen, fluorine, chlorine, alkyl (C 1 -C 4 ), halogeno Alkyl (C 1 -C 4 ), Cyanoalkyl (C 1 -C 4 ), Alkoxy (C 1 -C 4 ) alkyl (C 1 -C 4 ), Dialkylamino (C 1 -C 4 ) alkyl (C 1 -C 4 ), acyl (C 1 -C 4 ) -acetal, carbalkoxy (C 1 -C 4 ) or Wherein R 5 and R 6 are the same or different and represent hydrogen or alkyl (C 1 -C 4 ) or R 1 and R 2 together form a divalent group -CH = CH-CH = CH- R 3 represents hydrogen, chlorine, carboalkoxy (C 1 -C 4 ) or Wherein R 5 and R 6 are the same or different and represent alkyl (C 1 -C 4 ), R 4 represents hydrogen, fluorine, chlorine or cyano or R 3 and R 4 together are 2 Represents the group -CH = CH-CH = CH-. |