反应详情

To a round bottom flask was added EDC (569 mg, 2.97 mmol), HOBt (401 mg, 10.6 mmol), formic acid (248 mg, 5.40 mmol), DCM (20 mL), & NMP (2.5 mL). The reaction mixture was then stirred at room temperature under an atmosphere of nitrogen for 30 minutes. Then added tert-butyl {1-[4-(5-hydrazino-3-phenyl-1,6-naphthyridin-2-yl)phenyl]cyclobutyl}carbamate (1-6) (1.30 g, 2.70 mmol). The reaction mixture was then permitted to stir overnight at room temperature under an atmosphere of nitrogen. The reaction mixture was then suspended in ethyl acetate, washed with a saturated solution of sodium bicarbonate, followed by water, brine, dried over sodium sulfate, filtered, and concentrated in vacuo. The resulting residue was purified by silica gel chromatography 50-90% EtOAc/DCM, then 1-15% IPA/DCM. The appropriate fractions were combined and the solvent was removed in vacuo to give tert-butyl {1-[4-(9-phenyl[1,2,4]triazolo[3,4-f]-1,6-naphthyridin-8-yl)phenyl]cyclobutyl}carbamate (1-6b) as a tan solid. MS (M+H)+: observed=492.2, calculated=492.6.

1. stirringto stir overnight at room temperature under an atmosphere of nitrogen
2. washwashed with a saturated solution of sodium bicarbonate
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe resulting residue was purified by silica gel chromatography 50-90% EtOAc/DCM
7. customthe solvent was removed in vacuo