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AssigneeBASF SE
InventorsKarsten Koerber, Michael Rack, Pascal Bindschaedler, Martin John McLaughlin, Birgit Gockel, Devendra Vyas, Sebastian Soergel
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The invention relates to a process for the preparation of 5-bromo-1,3-dichloro-2-fluoro-benzene by diazotization and reduction of 6-bromo-2,4-dichloro-3-fluoro-aniline, which is obtained by bromination of 2,4-dichloro-3-fluoro-aniline, which is obtained by reduction of 1,3-dichloro-2-fluoro-4-nitro-benzene, and a process for preparing active compounds of formula V (Formula V) wherein the variables are defined in the specification by further transforming 5-bromo-1,3-dichloro-2-fluoro-benzene obtained from 2,4-dichloro-3-fluoro-aniline by the process according to the invention.
A process for preparing 5-bromo-1,3-dichloro-2-fluoro-benzene comprising diazotizing 6-bromo-2,4-dichloro-3-fluoro-aniline and reducing the resulting diazonium salt to yield 5-bromo-1,3-dichloro-2-fluoro-benzene.
6-bromo-2,4-dichloro-3-fluoro-aniline.
Dependencies are inferred from the claim text.