反应详情

To a solution of tert-butyl((5-chloro-3-(chloromethyl)pyridin-2-yl)(tetrahydrofuran-3-yl)methyl)carbamate (470 mg, 0.95 mmol) in anhydrous DMF (5 mL) was added with sodium hydride (115 mg, 2.84 mmol, 60% in mineral oil) in portions at 0° C. The mixture was stirred at rt for 2 h. The mixture was quenched with water (40 mL) and extracted with ethyl acetate (3×20 mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, concentrated under reduced pressure and purified by chromatography column on silica gel (eluting with 10% EtOAc in petroleum ether) to afford tert-butyl3-chloro-7-(tetrahydrofuran-3-yl)-5,7-dihydro-6H-pyrrolo[3,4-b]pyridine-6-carboxylate (285 mg, 91%) as a colorless oil. LCMS: tR=0.862 min in 5-95AB—1.5 min chromatography (MK RP-18e 25-2 mm), MS (ESI) m/z 324.9 [M+H]+. 1H NMR (CD3OD, 400 MHz): δ 8.47 (s, 1H), 7.83 (d, J=13.6 Hz, 1H), 5.10 (s, 1H), 4.65-4.50 (m, 1.5H), 3.95 (t, J=8.0 Hz, 0.5H), 3.85-3.67 (m, 4H), 3.03-2.87 (m, 1H), 2.15-1.65 (m, 2H), 1.54 (s, 9H).

1. customThe mixture was quenched with water (40 mL)
2. extractionextracted with ethyl acetate (3×20 mL)
3. dry with materialThe combined organic layers were dried over anhydrous sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure
6. custompurified by chromatography column on silica gel (eluting with 10% EtOAc in petroleum ether)