反应详情

6-(Benzylthio)-1-(2,3′-difluoro-5-hydroxy-[1,1′-biphenyl]-4-yl)quinolin-2(1H)-one (510 mg, 1.082 mmol) was dissolved in DMF (2163 μl). Then potassium carbonate (149 mg, 1.082 mmol) was added followed by iodoethane (96 μl, 1.190 mmol). After stirring at rt for 1 d, water was added. A gummy solid was collected with an aid of water, and dried. The crude material was absorbed onto a plug of silica gel and purified by chromatography through a Redi-Sep pre-packed silica gel column (40 g), eluting with a gradient of 0% to 50% EtOAc in heptane, to provide 6-(benzylthio)-1-(5-ethoxy-2,3′-difluoro-[1,1′-biphenyl]-4-yl)quinolin-2(1 H)-one (534 mg, 99% yield) as white solid. Ink (ESI) [M+H]+=500.0. NMR (400 MHz, DMSO-d6) δ ppm 1.00 (t, J=6.94 Hz, 3 H) 4.01-4.13 (m, 2 H) 4.24 (s, 2 H) 6.60 (d, J=8.80 Hz, 1 H) 6.70 (d, J=9.59 Hz, 1 H) 7.18-7.35 (m, 6 H) 7.38-7.48 (m, 3 H) 7.49-7.63 (m, 3 H) 7.79 (d, J=2.15 Hz, 1 H) 7.96 (d, J=9.59 Hz, 1 H).

1. customA gummy solid was collected with an aid of water
2. customdried
3. customThe crude material was absorbed onto a plug of silica gel
4. custompurified by chromatography through a Redi-Sep pre-packed silica gel column (40 g)
5. washeluting with a gradient of 0% to 50% EtOAc in heptane