[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:13]([CH:14]=[O:15])=[CH:12][N:11]=[C:10]([NH:16][C:17](=[O:19])[CH3:18])[CH:9]=2)=[C:4]([F:20])[C:3]=1[O:21][CH3:22].[BH4-].[Na+]>C1COCC1.CO>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:13]([CH2:14][OH:15])=[CH:12][N:11]=[C:10]([NH:16][C:17](=[O:19])[CH3:18])[CH:9]=2)=[C:4]([F:20])[C:3]=1[O:21][CH3:22]To a stirred solution of N-(4-(4-chloro-2-fluoro-3-methoxyphenyl)-5-formylpyridin-2-yl)acetamide (1.7 g, 2.370 mmol) in a mixture of THF (15 mL) and methanol (5 mL) was added sodium borohydride (0.090 g, 2.370 mmol) in two portions and the reaction mixture was stirred at room temperature for 30 min. The volatiles were removed, water (15 mL) was added and the solution extracted with ethyl acetate (2×20 mL). The combined organic layers were washed with brine (15 mL), dried over sodium sulphate, and concentrated under reduced pressure to afford N-(4-(4-chloro-2-fluoro-3-methoxyphenyl)-5-(hydroxymethyl)pyridin-2-yl)acetamide (1.6 g, 1.88 mmol, 38% yield) as a brown solid. The compound was carried into the next step without further purification. LCMS (ESI) m/e 324.9 [(M+H)+, calcd for C15H15ClFN2O3 325.1]; LC/MS retention time (Method F): tR=0.97 min.
読み込み中…
