C([Li])CCC.Br[C:7]1[CH:12]=[CH:11][C:10]([S:13][CH3:14])=[CH:9][CH:8]=1.[Cl:15][C:16]1[CH:17]=[CH:18][C:19]([CH:24]=[O:25])=[N:20][C:21]=1[O:22][CH3:23].[Cl-].[NH4+]>O1CCCC1>[Cl:15][C:16]1[CH:17]=[CH:18][C:19]([CH:24]([C:7]2[CH:12]=[CH:11][C:10]([S:13][CH3:14])=[CH:9][CH:8]=2)[OH:25])=[N:20][C:21]=1[O:22][CH3:23]n-Butyllithium (2.64 M, 2.9 mL) was added to a solution of 4-bromothioanisole (1.61 g) in tetrahydrofuran (20 mL) at −78° C. in a nitrogen atmosphere, and the mixture was stirred at the same temperature for 30 minutes. A solution of 5-chloro-6-methoxypyridine-2-carbaldehyde (1.14 g) in tetrahydrofuran (10 mL) was added to the reaction solution, followed by stirring for one hour. The reaction solution was poured into a saturated ammonium chloride solution, followed by extraction with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and filtered, after which the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=10:1→4:1) to give (5-chloro-6-methoxypyridin-2-yl)[4-(methylsulfanyl)phenyl]methanol as a pale yellow oil (1.42 g).
読み込み中…
