反应详情

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 (75 mg, 0.16 mmol) in dry DMF (1 mL) was added sodium hydride (15 mg, 0.38 mmol) and 2-(bromomethyl)pyridine.HBr (48 mg, 0.19 mmol) under nitrogen. The resulting mixture was stirred for 1 hour at room temperature. A saturated solution of NaHCO3 was added and the mixture was extracted with dichloromethane (3×10 ml) 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 40% EtOAc in cyclohexane) to give the title compound (11 mg, 12%). 1H NMR (500 MHz, CDCl3): 8.49 (1H, d), 7.63 (1H, t), 7.42 (1H, s), 7.27 (1H, d), 7.19-7.13 (8H, m), 7.01-6.98 (2H, d), 5.23 (2H, s), 4.92 (2H, s), 4.91 (1H, s), 2.52-2.20 (4H, m), 2.00-1.95 (1H, m), 1.75-1.70 (1H, m), 1.44-1.15 (9H, br).

1. extractionthe mixture was extracted with dichloromethane (3×10 ml)
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 40% EtOAc in cyclohexane)