反应详情

3-Chloroperoxybenzoic acid (77%; 597 mg, 2.67 mmol) was added to a solution of methyl 2-{[2-(4-fluorophenyl)quinolin-6-yl]thio}benzoate (346 mg, 0.89 mmol) in dichloromethane (15 mL). The resulting mixture was stirred at room temperature under nitrogen for 1 hour 20 minutes. Calcium hydroxide (308 mg, 4.16 mmol) was added and the resulting slurry stirred for 1 hour 15 minutes. The mixture was filtered and the filter cake washed thoroughly with dichloromethane. The filtrate was evaporated and the residue given a preliminary purification by elution from a silica pad with dichloromethane then 2.5% ethyl acetate/dichloromethane to afford an oil. Crystallisation from diethyl ether gave the title compound, in two crops, as pale yellow crystals (301 mg, 80%). 1H NMR (500 MHz, CDCl3) δ 8.57 (1H, d, J 1.7 Hz), 8.36 (1H, d, J 8.7 Hz), 8.25-8.15 (5H, m), 7.95 (1H, d, J 8.6 Hz), 7.67-7.65 (2H, m), 7.61 (1H, m), 7.22 (2H, t, J 8.6 Hz), 3.95 (3H, s); m/z (ES+) 422 [MH+].

1. stirringthe resulting slurry stirred for 1 hour 15 minutes
2. filtrationThe mixture was filtered
3. washthe filter cake washed thoroughly with dichloromethane
4. customThe filtrate was evaporated
5. customa preliminary purification
6. washby elution from a silica pad with dichloromethane
7. custom2.5% ethyl acetate/dichloromethane to afford an oil
8. customCrystallisation from diethyl ether