1: 3-methyl-1-phenyl-1H-pyrazole-5-carboxylic acid With oxalyl dichloride; N,N-dimethyl-formamide in dichloromethane T=0 - 20°C; 3 h; 2: 1-(3-chloro-phenyl)-piperazine With triethylamine in tetrahydrofuran T=20°C; 18 h;