申请人:Zierke Thomas
公开号:US20070203356A1
公开(公告)日:2007-08-30
The invention relates to a process for preparing semicarbazone 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, by reacting 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.