[CH3:1][N:2]1[C:6]([C:7]([O:9][CH3:10])=[O:8])=[CH:5][C:4]([N+:11]([O-])=O)=[N:3]1.[H][H]>C(OCC)(=O)C.C(O)C.[Pd]>[NH2:11][C:4]1[CH:5]=[C:6]([C:7]([O:9][CH3:10])=[O:8])[N:2]([CH3:1])[N:3]=1
In a 250 mL Parr hydrogenation flask was placed methyl 1-methyl-3-nitro-1H-pyrazole-5-carboxylate, (530 mg, 2.9 mmol) dissolved in ethyl acetate (15 mL) and ethanol (15 mL), to which was added 10% Pd/C (Degussa type) (100 mg). The mixture was placed on the Parr apparatus and pressurized with hydrogen to 50 PSI and shaken for 2.5 hrs. The reaction was filtered through a pad of celite which was washed with ethyl acetate. The solvent was removed under vacuum to give 119a as a white solid (450 mg, 2.9 mmol, quantitative yield).
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