[CH3:1][N:2]1[CH:6]=[C:5]([CH:7]=O)[C:4]([C:9]2[O:10][C:11]([N+:14]([O-:16])=[O:15])=[CH:12][CH:13]=2)=[N:3]1.[CH3:17][N:18]([CH3:20])[NH2:19].C(O)C>C(O)(=O)C.O>[CH3:17][N:18]([CH3:20])[N:19]=[CH:7][C:5]1[C:4]([C:9]2[O:10][C:11]([N+:14]([O-:16])=[O:15])=[CH:12][CH:13]=2)=[N:3][N:2]([CH3:1])[CH:6]=1Stir together 2 g of 1-methyl-3-(5-nitro-2-furyl)pyrazole-4-carboxaldehyde, 0.65 g of N,N-dimethylhydrazine, 2 drops of glacial acetic acid and 30 ml of ethanol for 4 hours at room temperature. Add 30 ml of water dropwise thereto to obtain a 96% yield of 1-methyl-3-(5-nitro-2-furyl)pyrazole-4-carboxaldehyde-dimethylhydrazone [m.p. 164° to 165° C].
読み込み中…