[Cl:1][C:2]1[N:7]=[N:6][C:5]([C:8](OC)=[O:9])=[C:4]([NH:12][C:13]2[CH:18]=[CH:17][C:16]([S:19]([CH3:22])(=[O:21])=[O:20])=[CH:15][N:14]=2)[CH:3]=1.[NH3:23]>>[Cl:1][C:2]1[N:7]=[N:6][C:5]([C:8]([NH2:23])=[O:9])=[C:4]([NH:12][C:13]2[CH:18]=[CH:17][C:16]([S:19]([CH3:22])(=[O:21])=[O:20])=[CH:15][N:14]=2)[CH:3]=1Methyl 6-chloro-4-(5-(methylsulfonyl)pyridin-2-ylamino)pyridazine-3-carboxylate (62 mg, 0.181 mmol) was suspended in ammonia (7M in methanol, 3.94 g, 5 mL, 35.0 mmol). The reaction vessel was sealed. After 18 h, the mixture was concentrated in vacuo to give 6-chloro-4-(5-(methylsulfonyl)pyridin-2-ylamino)pyridazine-3-carboxamide (60 mg, 100%) as an off-white solid that was used directly in the next step without further purification.
読み込み中…