Patent ID: 7795465

Claim:
A process for preparing phenylsemicarbazone compounds of the formula I where R 1 and R 2 are each independently hydrogen, halogen, CN, C 1 -C 4 -alkyl, C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkyl or C 1 -C 4 -haloalkoxy, and R 3 is C 1 -C 4 -alkoxy, C 1 -C 4 -haloalkyl or C 1 -C 4 -haloalkoxy, comprising the reaction of a hydrazone compound of the general formula II where R is C 1 -C 4 -alkoxy, amino, C 1 -C 4 -alkylamino or di(C 1 -C 4 alkyl)amino, and R 1 , R 2 are each as defined above with an aniline compound of the general formula III where R 3 is as defined above.