DERIVES D'ACIDE CARBAZIQUE, PROCEDE POUR LEUR PREPARATION ET COMPOSITIONS LES CONTENANT

The invention relates to new carbazic acid derivatives, a process for the preparation thereof and compositions-particularly feed additives and animal feeds-containing the same. The new compounds according to the invention correspond to the formula (I) R1=N-NH-COOR3 (I) wherein R1 stands for a C7-12 cycloalkylidene group, an indanylidene group or a group of the formula (IX) (IX) wherein A represents a phenyl group optionally carrying one or more identical or different substituents selected from the group consisting of halo, nitro, hydroxy, C1-4 alkoxy, C1-4 alkyl, amino or C1-4 alkoxycarbonylhydrazino; phenyl-(C1-4 alkyl), C1-16 alkyl, C3-7 cycloalkyl or indolyl, or a C3-C6 cycloalkyl group substituted by a C3-C6 cycloalkyl group; R2 denotes a hydrogen atom, a C1-16 alkyl or a C3-7 cycloalkyl group; and R3 represents a C1-4 alkyl group.