[NH2:1][C:2]1[CH2:6][C:5](=[O:7])[NH:4][N:3]=1.[CH3:8][O:9][C:10]1[CH:16]=[CH:15][C:13](N)=[CH:12][CH:11]=1>C(O)(=O)C>[CH3:8][O:9][C:10]1[CH:16]=[CH:15][C:13]([NH:1][C:2]2[CH2:6][C:5](=[O:7])[NH:4][N:3]=2)=[CH:12][CH:11]=1A mixture of 3-amino-2-pyrazolin-5-one (20 mmol), 4-methoxyaniline (25 mol) in 50 ml of acetic acid was refluxed for 4 hours. The solvent was evaporated, the residue was suspended in water. The solid was filtered and crystallized from methanol.
Wird geladen…