反应详情

To a solution of Example 113C (0.30 g, 1.4 mmol) and Et3N (0.56 mL, 4.1 mmol) in THF (10 mL) was added 2-fluoro-5-methylbenzoyl chloride (0.23 g, 1.4 mmol). The mixture was stirred at ambient temperature for 4 hours then partitioned between saturated aqueous NaHCO3 (10 mL) and EtOAc (10 mL). The layers were separated and the aqueous phase was extracted EtOAc (3×10 mL). The combined organic extracts were dried over Na2SO4, filtered, and concentrated under reduced pressure. Purification by column chromatography (SiO2, 50% hexanes in EtOAc to 100% EtOAc to 9:1:0.1 EtOAc:MeOH:Et3N) afforded the title compound (0.24 g, 0.67 mmol, 50% yield). MS (ESI+) m/z 358 (M+H)−.

1. customthen partitioned between saturated aqueous NaHCO3 (10 mL) and EtOAc (10 mL)
2. customThe layers were separated
3. extractionthe aqueous phase was extracted EtOAc (3×10 mL)
4. dry with materialThe combined organic extracts were dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customPurification by column chromatography (SiO2, 50% hexanes in EtOAc to 100% EtOAc to 9:1:0.1 EtOAc:MeOH:Et3N)