[CH3:1][N:2]1[CH2:7][CH2:6][C@H:5]([C:8]2[CH:13]=[CH:12][C:11]([Cl:14])=[C:10]([Cl:15])[CH:9]=2)[C@H:4]([CH2:16][OH:17])[CH2:3]1.[H-].[Na+].S(OCC)(O[CH2:24][CH3:25])(=O)=O.O>O1CCCC1>[CH3:1][N:2]1[CH2:7][CH2:6][C@H:5]([C:8]2[CH:13]=[CH:12][C:11]([Cl:14])=[C:10]([Cl:15])[CH:9]=2)[C@H:4]([CH2:16][O:17][CH2:24][CH3:25])[CH2:3]1A solution of (3) (2.4 g, 8.6 mmol) in tetrahydrofuran (40 ml) was added 60% NaH (0.69 g, 17 mmol) and stirred at room temperature for one hour. Diethyl sulfate (1.4 ml, 11 mmol) was added and the reaction mixture stirred over night. Water was added and the reaction mixture was extracted with diethyl ether (3×40 ml). The combined organic phases was dried with magnesium sulfate and evaporated to dryness. Column chromatography, using a mixture of dichloromethane, methanol and ammonia (aq) (9:1:1%) yielded 1.5 g (56%) of product (9) (oil).
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