Sodium hydride → (R)-1-(5-acetoxyhexyl)-3-(2-furylmethyl)-7-methylxanthine

反応式

[O:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[CH2:6][N:7]1[C:15]2[N:14]=[CH:13][N:12]([CH3:16])[C:11]=2[C:10](=[O:17])[NH:9][C:8]1=[O:18].[H-].[Na+].[C:21]([O:24][C@H:25]([CH3:31])[CH2:26][CH2:27][CH2:28][CH2:29]I)(=[O:23])[CH3:22]>CS(C)=O>[C:21]([O:24][C@H:25]([CH3:31])[CH2:26][CH2:27][CH2:28][CH2:29][N:9]1[C:10](=[O:17])[C:11]2[N:12]([CH3:16])[CH:13]=[N:14][C:15]=2[N:7]([CH2:6][C:2]2[O:1][CH:5]=[CH:4][CH:3]=2)[C:8]1=[O:18])(=[O:23])[CH3:22]

参加物

実験手順

To a stirring suspension 3-(2-furylmethyl)-7-methylxanthine (0.40 g, 1.62 mmol) in dimethylsulfoxide (20 ml) was added sodium hydride (41 mg, 1.71 mmol) in one portion. After stirring for 25 minutes, (R)-5-acetoxy-1-iodohexane (0.46 g, 1.71 mol) was added neat. After stirring at room temperature for 72 hours, the reaction was quenched by the addition of water (75 ml) and extracted with ethyl acetate (3×35 ml). The combined extracts were washed with saturated aqueous sodium chloride solution (2×35 ml), dried over sodium sulfate and concentrated under reduced pressure. The residue was purified by flash chromatography on silica gel eluting with ethyl acetate to give (R)-1-(5-acetoxyhexyl)-3-(2-furylmethyl)-7-methylxanthine (0.49 g, 78% yield) as a colorless oil.