反应详情

温度

95 °C

To a round bottom flask was added tert-butyl{1-[4-(5-hydrazino-3-phenyl-1,6-naphthyridin-2-yl)phenyl]cyclobutyl}carbamate (1-6) (2.77 g, 5.75 mmol), and 1,1′-carbonylbis(1H-imidazole) (4.10 g, 4.40 mmol), in 1,4Dioxane (30 mL). The sealed reaction mixture was then heated at 95° C. under an atmosphere of nitrogen. To the crude reaction mixture was added a saturated solution of sodium bicarbonate (100 mL) and ethyl acetate. The organic layer was washed with a saturated solution of sodium bicarbonate, followed by water, then brine, dried over sodium sulfate, filtered, and concentrated. The resulting residue was then purified by silica gel chromatography eluting with 0-10% IPA/DCM. The appropriate fractions were then combined and the solvent was removed in vacuo to give tert-butyl{1-[4-(3-hydroxy-9-phenyl[1,2,4]triazolo[3,4-f]-1,6-naphthyridin-8-yl)phenyl]cyclobutyl}carbamate (1-6a) as a tan solid. MS (M+H)+: observed=508.1, calculated=508.6.

1. customThe sealed reaction mixture
2. customTo the crude reaction mixture
3. washThe organic layer was washed with a saturated solution of sodium bicarbonate
4. dry with materialbrine, dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated
7. customThe resulting residue was then purified by silica gel chromatography
8. washeluting with 0-10% IPA/DCM
9. customthe solvent was removed in vacuo