反应详情

温度

50 °C

A mixture of 3-(5-(azetidin-3-yl)pyridin-2-ylamino)-5-bromo-1-methylpyridin-2(1H)-one 239b (140 mg, 0.42 mmol), oxetan-3-one (91 mg, 1.26 mmol), NaBH3CN (78 mg, 1.26 mmol), and zinc chloride (171 mg, 1.26 mmol) in methanol (10 mL) was stirred at 50° C. for 2 hours. The mixture was concentrated under reduced pressure and water (5 mL) was added to the residue. It was then extracted with dichloromethane (3×10 mL). The combined organic layer was concentrated under reduced pressure. The residue was purified by column chromatography eluting with 50:1 dichloromethane/methanol to afford 272a (145 mg, 85%). MS-ESI: [M+H]+ 390.8

1. concentrationThe mixture was concentrated under reduced pressure and water (5 mL)
2. additionwas added to the residue
3. extractionIt was then extracted with dichloromethane (3×10 mL)
4. concentrationThe combined organic layer was concentrated under reduced pressure
5. customThe residue was purified by column chromatography
6. washeluting with 50:1 dichloromethane/methanol