[Si]([O:8][CH2:9][C:10]1[CH:15]=[CH:14][C:13]([C:16]([NH2:19])([CH3:18])[CH3:17])=[CH:12][N:11]=1)(C(C)(C)C)(C)C>CC(O)=O.C1COCC1.O>[OH:8][CH2:9][C:10]1[CH:15]=[CH:14][C:13]([C:16]([NH2:19])([CH3:17])[CH3:18])=[CH:12][N:11]=1A solution of 1-[2-(tert-butyldimethylsilyloxymethyl)pyridin-5-yl](1-methyl)ethylamine (1.5 g, 5.35 mmol) in AcOH (15 ml), THF (5 ml) and H2O (5 ml) was heated at 50° C. for 2.5 h. The resultant mixture was concentrated under reduced pressue and then azeotroped with toluene (2×50 ml). The residue was dissolved in CH2Cl2 (15 ml) and MeOH (15 ml) and dry loaded onto silica. Purification by column chromatography on silica, using 10% MeOH/CH2Cl2 containing 1% NH3 solution as eluent, gave the desired alcohol (330 mg, 37%).
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