Hydrazine hydrate (1:1) → HCID 178489936, compound
Reaction equation
O[C:2]1[C:11]2[C:6](=[N:7][CH:8]=[CH:9][CH:10]=2)[N:5]([C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[C:4](=[O:18])[C:3]=1[C:19](=O)[CH2:20][C:21]1[CH:26]=[CH:25][C:24]([O:27][CH3:28])=[CH:23][CH:22]=1.O.[NH2:31][NH2:32]>CN(C=O)C>[CH3:28][O:27][C:24]1[CH:23]=[CH:22][C:21]([CH2:20][C:19]2[C:3]3[C:4](=[O:18])[N:5]([C:12]4[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=4)[C:6]4[N:7]=[CH:8][CH:9]=[CH:10][C:11]=4[C:2]=3[NH:32][N:31]=2)=[CH:26][CH:25]=1Participants
4
Procedure
To a suspension of 4-hydroxy-3-[1-oxo-2-(4-methoxyphenyl)ethyl]-1-phenyl-1,8-naphthyridin-2 (1H)-one (50 mg, 0.13 mmol, prepared in Synthetic Example 15) in DMF (1 ml) was added hydrazine monohydrate (80%, 1 ml, 24.96 mmol, 192 eq.), and the mixture was treated in the same manner as in Example 16 to give 3-(4-methoxybenzyl)-5-phenyl-1H-pyrazolo[4,3-c][1,8]naphthyridin-4 (5H)-one (44 mg, 89%).