反应详情

5-Isobutyrylamino-4′-methyl-biphenyl-3-carboxylic acid methyl ester (0.786 g, 2.32 mmol) and NaH (6.2 g, 2.55 mmol) were added to DMF (20 mL), and the mixture was stirred for 30 minutes at room temperature, then cooled to 0° C. Ethyl iodide (1.181 g, 11.6 mmol) was added, and the reaction mixture was stirred for five days at room temperature. The reaction was quenched by addition of saturated aqueous NH4Cl and water, and the mixture was extracted with diethyl ether. The combined organic layers were separated, washed with water and brine, dried over MgSO4, filtered and concentrated under reduced pressure. The residue was purified by flash chromatography (30% ethyl acetate in hexanes) to give 0.461 g of 5-(ethyl-isobutyryl-amino)-4′-methyl-biphenyl-3-carboxylic acid methyl ester.

1. temperaturecooled to 0° C
2. stirringthe reaction mixture was stirred for five days at room temperature
3. customThe reaction was quenched by addition of saturated aqueous NH4Cl and water
4. extractionthe mixture was extracted with diethyl ether
5. customThe combined organic layers were separated
6. washwashed with water and brine
7. dry with materialdried over MgSO4
8. filtrationfiltered
9. concentrationconcentrated under reduced pressure
10. customThe residue was purified by flash chromatography (30% ethyl acetate in hexanes)