反应详情

温度

60 °C

To a solution of (E)-2-methoxy-5-((2,4,6-trimethoxystyrylsulfonyl)methyl)pyridin-3-amine (28 mg, 0.072 mmol) in DMF (5 mL), ethyl bromoacetate (0.110 mL, 1 mmol) and potassium carbonate (138 mg, 1 mmol) were added. The mixture was stirred at 60° C. overnight. The mixture was diluted with H2O (20 mL) and extracted (2×20 mL ethyl acetate). The combined extracts were washed with brine, dried on MgSO4, and filtered. The residue was further purified by silica gel chromatography, eluting with PE/EtOAc (2:3, v/v) to afford pure product as a white solid (24.2 mg, 70%). 1H-NMR (CDCl3): δ 3.85 (s, 6H, 2×OCH3), 3.87 (s, 3H, OCH3), 3.90 (d, 2H, J=2.8 Hz, CH2), 4.00 (s, 3H, OCH3), 4.15 (s, 2H, CH2), 4.27 (q, 2H, CH2), 6.10 (s, 2H, Ph-H), 6.74 (d, 1H, J=2.0 Hz, Py-H), 7.04 (d, 1H, J=15.6 Hz, CH), 7.44 (d, 1H, J=2.0 Hz, Py-H), 7.811 (d, 1H, J=15.6 Hz, CH); HR-MS (ESI+) m/z: 481.1364 [M+H]+; C22H28N2O8S requires 480.1566,

1. extractionextracted (2×20 mL ethyl acetate)
2. washThe combined extracts were washed with brine
3. customdried on MgSO4
4. filtrationfiltered
5. customThe residue was further purified by silica gel chromatography
6. washeluting with PE/EtOAc (2:3