Thionyl Chloride → 2-Chloro-N-[4-(2-furyl)-5-morpholinothiazol-2-yl]pyridine-4-carboxamide
反応式
[Cl:1][C:2]1[CH:3]=[C:4]([CH:8]=[CH:9][N:10]=1)[C:5]([OH:7])=O.S(Cl)(Cl)=O.[NH2:15][C:16]1[S:17][C:18]([N:26]2[CH2:31][CH2:30][O:29][CH2:28][CH2:27]2)=[C:19]([C:21]2[O:22][CH:23]=[CH:24][CH:25]=2)[N:20]=1>N1C=CC=CC=1>[Cl:1][C:2]1[CH:3]=[C:4]([C:5]([NH:15][C:16]2[S:17][C:18]([N:26]3[CH2:27][CH2:28][O:29][CH2:30][CH2:31]3)=[C:19]([C:21]3[O:22][CH:23]=[CH:24][CH:25]=3)[N:20]=2)=[O:7])[CH:8]=[CH:9][N:10]=1参加物
5
実験手順
2-Chloroisonicotinic acid (5.00 g, 31.7 mmol) was added to thionyl chloride (40 mL), followed by stirring under heating and reflux for 2 hours. The reaction mixture was concentrated under reduced pressure, and the resulting residue was dissolved in dichloromethane (1 mL). The resulting solution was added to a pyridine (16 mL) solution of 2-amino-4-(2-furyl)-5-morpholinothiazole (880 mg, 5.00 mmol) obtained in Step 1 of Example 29, and then N,N-dimethylaminopyridine (48.8 mmol, 0.400 mmol) was added thereto, followed by stirring at room temperature for 1 hour. The reaction mixture was concentrated under reduced pressure, and the resulting residue was purified through silica gel column chromatography (hexane:ethyl acetate=1:3 to ethyl acetate) to afford the entitled Compound 39 (1.05 g, 66%)