1: [3,2-c]pyrazole With sodium hydride in dimethyl sulfoxide T=0 - 20°C; 1 h; 2: 2-Chloro-5-pyridinecarboxylic Acid Methyl Ester in dimethyl sulfoxide T=20°C; 6 h;

[3,2-c]pyrazole; NaH in dimethyl sulfoxide

1: With sodium tetrahydroborate; tert-butyl alcohol Heating / reflux; 2: With methanol in tert-butyl alcohol 6 h; Heating / reflux; 3: With hydrogenchloride; water in methanol; tert-butyl alcohol

water Acidic aq. solution;