反应详情

To a solution of 6-(benzyloxy)-6-oxohexanoic acid (40 mg, 0.169 mmol), EDC (114 mg, 0.593 mmol) and HOBt (2.59 mg, 0.017 mmol) in DMF (5 mL) at rt was added 2-({2-[(α-L-fucopyranosyl)oxy]ethyl}amino)ethyl α-L-fucopyranoside (190 mg, 0.478 mmol). After stirring for 16 hr, the reaction mixture was concentrated and the residue was purified by flash chromatography on C18 reverse phase silica gel (50 g), eluting with 5-40% AcCN in water to give the title compound. UPLC Method B: m/e=616.2923 [M+1]; Rt=3.114 min. 1H NMR (CD3OD) δ 1.24 (6H, d, J=6.58), 1.72-1.64 (4H, m), 2.45 (2H, t, J=7.11), 2.53 (2H, t, J=7.32), 3.91-3.55 (17H, m), 4.78-4.75 (2H, m), 5.14 (2H, s), 7.38-7.37 (5H, m).

1. concentrationthe reaction mixture was concentrated
2. customthe residue was purified by flash chromatography on C18 reverse phase silica gel (50 g)
3. washeluting with 5-40% AcCN in water