Method for producing semicarbazones

Details Method for producing semicarbazones Method for producing semicarbazones

C - Chemistry, Metallurgy

07

C

C07C 281/04 (2006.01) C07C 281/14 (2006.01)

Patent

CA 2558368

The invention relates to a method for producing semicarbazone compounds of formula (I) wherein R1 and R2 independently represent hydrogen, halogen, CN, C1-C4 alkyl, C1-C4 alkoxy, C1-C4 haloalkyl or C1-C4 haloalkoxy, and R3 represents C1-C4 alkoxy, C1-C4 haloalkyl or C1-C4 haloalkoxy. According to said method, a hydrazone compound of general formula (II), wherein R represents C1-C4 alkoxy, amino, C1-C4 alkylamino or di-(C1-C4-alkyl)amino, and R1 and R2 have the above-mentioned designations, is reacted with an aniline compound of general formula (III) wherein R3 has the above-mentioned designation.

L'invention concerne un procédé pour produire des composés de semicarbazones de formule (I), dans laquelle R?1¿ et R?2¿ représentent indépendamment l'un de l'autre hydrogène, halogène, CN, alkyle C¿1?-C¿4?, alcoxy C¿1?-C¿4?, haloalkyle C¿1?-C¿4? ou haloalcoxy C¿1?-C¿4? et R?3¿ représente alcoxy C¿1?-C¿4?, haloalkyle C¿1?-C¿4? ou haloalcoxy C¿1?-C¿4?. Selon ce procédé, on fait réagir un composé hydrazone de formule générale (II), dans laquelle R représente alcoxy C¿1?-C¿4?, amino, alkylamino C¿1?-C¿4? ou dialkylamino C¿1?-C¿4?, et R?1¿, R?2¿ ont la signification mentionnée précédemment, avec un composé aniline de formule générale (III) dans laquelle R?3¿ a la signification mentionnée précédemment.

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