反应详情

温度

45 °C

Methanesulfonic acid 4-oxo-5-[5-(8-trifluoromethyl-quinolin-4-yloxy)-pentyloxy]-4H-pyran-2-ylmethyl ester 19 (94 mg, 0.187 mmol) was dissolved in dichloromethane (5 mL). 1-Methyl-piperazine (52 μL, 0.47 mmol) was added via syringe. The mixture was stirred at 45° C. for 1 h. CH2Cl2 (75 ml) was added and the solution washed with NaHCO3 10% (3×50 mL) and brine (3×50 mL). The organic layer was dried over MgSO4, filtered and evaporated. The crude product was purified by column chromatography on silica using as eluent CH2Cl2:MeOH=9:1. 5-(5-(8-(Trifluoromethyl)quinolin-4-yloxy)pentyloxy)-2-((4-methylpiperazin-1-yl)methyl)-4H-pyran-4-one EHT 5847 was obtained (13.6 mg, 15% yield) as a white foam.

1. washthe solution washed with NaHCO3 10% (3×50 mL) and brine (3×50 mL)
2. dry with materialThe organic layer was dried over MgSO4
3. filtrationfiltered
4. customevaporated
5. customThe crude product was purified by column chromatography on silica using as eluent CH2Cl2