反应详情

温度

0 °C

To a solution of tert-butyl(1-(4-(2-oxo-7-phenyl-2,3-dihydro-1H-pyrido[2,3-b][1,4]oxazin-6-yl)phenyl)cyclobutyl)carbamate (60 mg, 0.13 mmol) in dry DMF (1 mL) was added sodium hydride (6 mg, 0.14 mmol) at 0° C. under nitrogen. After 1 h at 0° C., iodomethane (9 μL, 0.14 mmol) was added and the resulting mixture was stirred for an additional 10 min at 0° C. A saturated solution of NH4Cl was added and the mixture was extracted with dichloromethane (3×) using a phase separator (Isolute® SPE). The combined organic phases were concentrated to dryness under reduced pressure. The resulting residue was purified by Biotage silica gel chromatography (gradient 0 to 30% EtOAc in cyclohexane) to give the title compound as a white solid (38 mg, 60%). 1H NMR (500 MHz, CDCl3): 7.31-7.24 (8H, m), 721-7.19 (2H,m), 5.01 (1H, br s), 4.90 (2H, s), 3.39 (3H, s),2.55-2.25 (4H, m), 2.09-2.01 (1H, m), 1.84-1.76 (1H, m), 1.44-1.15 (9H, br).

1. extractionthe mixture was extracted with dichloromethane (3×)
2. concentrationThe combined organic phases were concentrated to dryness under reduced pressure
3. customThe resulting residue was purified by Biotage silica gel chromatography (gradient 0 to 30% EtOAc in cyclohexane)