A process for the preparation of for the preparation of N-piperidino-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methylpyrazole-3- -carboxamide and of its salts, wherein 1,5-dibromopentane is reacted with a compound of formula (IIIa) in the presence of Na.sub.2CO.sub.3 in acetonitrile heated at reflux.

 
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