反应详情

温度

0 °C

To a 300 mL round-bottomed flask was added 5-[(R)-2-benzylamino-1-(tert-butyldimethylsilanyloxy)ethyl]-8-benzyloxy-1H-quinolin-2-one (5 g, 9.73 mmol), dichloromethane (100 mL) and glacial acetic acid (0.6 mL, 10 mmol). This mixture was cooled to 0° C. using an ice bath and biphenyl-2-ylcarbamic acid 1-(9-oxononyl)piperidin-4-yl ester (4.6 g, 9.73 mmol) was added with stirring. This mixture was stirred at 0° C. for 30 minutes and then sodium triacetoxyborohydride (6.15 g, 29 mmol) was added in portions over 15 minutes. The reaction mixture was stirred at 0° to 10° C. for 2 hours and then aqueous saturated sodium bicarbonate solution (50 mL) was added and this mixture was stirred for 15 minutes. The layers were then separated and the organic layer was washed with 5% aqueous sodium chloride solution (50 mL), dried (MgSO4), filtered and concentrated under reduced pressure to afford the title intermediate (8.5 g, 80% purity by HPLC), which was used without further purification.

1. stirringThis mixture was stirred at 0° C. for 30 minutes
2. stirringThe reaction mixture was stirred at 0° to 10° C. for 2 hours
3. stirringthis mixture was stirred for 15 minutes
4. customThe layers were then separated
5. washthe organic layer was washed with 5% aqueous sodium chloride solution (50 mL)
6. dry with materialdried (MgSO4)
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure