反应详情

A solution of pyrrolidine (0.167 mL, 2.017 mmol) and 1-ethyl-6,7-bis((4-methoxybenzyl)oxy)-4-oxo-1,4-dihydrocinnoline-3-carbaldehyde (0.87 g, 1.833 mmol) in 1,2-dichloroethane (DCE) (19 mL) and 2 drops of acetic acid was treated with sodium triacetoxyborohydride (0.583 g, 2.75 mmol). The reaction mixture was stirred for 1.5 h and then concentrated. The residue was purified by automatic silica gel column chromatography (Combiflash RF), eluting with [dichloromethane/methanol/ammonium hydroxide (80:20:2)]/dichloromethane (0-60%) to afford 1-ethyl-6,7-bis((4-methoxybenzyl)oxy)-3-(pyrrolidin-1-ylmethyl)cinnolin-4(1H)-one (750 mg, 1.416 mmol, 77% yield) as a light yellow gummy solid. LCMS: (M+H)+: 530.3

1. concentrationconcentrated
2. customThe residue was purified by automatic silica gel column chromatography (Combiflash RF)
3. washeluting with [dichloromethane/methanol/ammonium hydroxide (80:20:2)]/dichloromethane (0-60%)