Nitrogen → 2-chloro-5-(MethoxyMethoxy)pyridine
反応式
[H-].[Na+].N#N.[Cl:5][C:6]1[CH:11]=[CH:10][C:9]([OH:12])=[CH:8][N:7]=1.Cl[CH2:14][O:15][CH3:16]>CN(C=O)C>[Cl:5][C:6]1[CH:11]=[CH:10][C:9]([O:12][CH2:14][O:15][CH3:16])=[CH:8][N:7]=1[H-].[Na+].N#N.[Cl:5][C:6]1[CH:11]=[CH:10][C:9]([OH:12])=[CH:8][N:7]=1.Cl[CH2:14][O:15][CH3:16]>CN(C=O)C>[Cl:5][C:6]1[CH:11]=[CH:10][C:9]([O:12][CH2:14][O:15][CH3:16])=[CH:8][N:7]=1Sodium hydride (60% dispersion in oil, 1.83 g, 46.0 mmol) was suspended in anhydrous DMF (50 mL) at under N2 at room temperature with stirring. A solution of 2-chloro-5-hydroxy-pyridine (5.0 g, 38.2 mmol) in anhydrous DMF (20 mL) was added dropwise over 30 min. Stirring at room temperature was continued for 1.5 hours. Chloromethyl methylether (3.32 mL, 44.1 mmol) was next added neat over 20 min. Stirring was continued at room temperature for 12 hours. The mixture was partitioned between water and EtOAc. The organics were washed with brine, dried over Na2SO4, filtered and concentrated. The crude residue was chromatographed on silica gel, eluting with 20% EtOAc in Hexanes to provide the desired product as a clear oil (6.4 g, 96%). 1H NMR (400 MHz, CDCl3): δ 8.18 (s, 1H), 7.36 (d, J=8.6 Hz, 1H), 7.23 (d, J=8.6 Hz, 1H), 5.19 (s, 2H), 3.50 (s, 3H).
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