反应详情

8-Trifluoromethyl-quinolin-4-ol (0.84 g, 2.88 mmol) was dissolved in DMF (5 mL). Cs2CO3 (0.98 g, 3.02 mmol) was added at room temperature and the mixture was stirred for 10 min. A solution of 5-(5-bromo-pentyloxy)-2-hydroxymethyl-pyran-4-one 10 (0.86 g, 3.02 mmol) in DMF (5 mL) was added via syringe. This mixture was stirred at 50° C. for 18 h. Water (10 mL) was added and the mixture extracted with EtOAc (2×50 mL), washed with water (3×50 mL), brine (3×50 mL) dried over MgSO4, filtered and evaporated. The crude product was purified by column chromatography on silica using as eluent (CH2Cl2:MeOH)=90:10. 5-(5-(8-(Trifluoromethyl)quinolin-4-yloxy)pentyloxy)-2-(hydroxymethyl)-4H-pyran-4-one 14 was obtained (0.53 g, 35% yield) as a pale yellow foam.

1. stirringThis mixture was stirred at 50° C. for 18 h
2. extractionthe mixture extracted with EtOAc (2×50 mL)
3. washwashed with water (3×50 mL), brine (3×50 mL)
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. customevaporated
7. customThe crude product was purified by column chromatography on silica using as eluent (CH2Cl2:MeOH)=90:10