反应详情

15 mL of THF was added to 0.47 g (12.5 mmol, 8 eq) of sodium borohydride. 0.85 g (6.27 mmol, 4 eq) of zinc chloride was added at 30° C., and the mixture was stirred at 35˜37° C. for 15 minutes. 1 g (1.57 mmol) of tert-butyl (3S)-3-hydroxy-3-{6-[(methylamino)carbonyl]-2-naphthyl}-3-(1-trityl-1H-imidazol-4-yl)propanoate was added at 35° C. The mixture was stirred at 45˜49° C. for 24 hours and 30 minutes. 5 mL of water was added dropwise at 35° C. or lower. 15 mL of water and 5 mL of an aqueous saturated ammonium chloride solution were added, and the mixture was stirred at 20˜25° C. for 6 hours. After diluted with 50 mL of ethyl acetate, 10 mL of ethanol and 10 mL of water, insoluble materials were filtered. The filtrate was separated, and the organic layer was washed successively with 20 mL of water and 20 mL of an aqueous saturated sodium chloride solution. After concentrated under reduced pressure, 1 mL of ethyl acetate and 2 mL of IPE were added to the concentration residue, crystals were loosened, filtered, and washed with 1.25 mL of ethyl acetate/IPE=1/1 two times. Vacuum drying (40° C.) to a constant weight afforded 0.48 g of 6-[(1S)-1,3-dihydroxy-1-(1-trityl-1H-imidazol-4-yl)propyl]-N-methyl-2-naphthamide (yield 58%).

1. stirringThe mixture was stirred at 45˜49° C. for 24 hours and 30 minutes
2. stirringthe mixture was stirred at 20˜25° C. for 6 hours
3. filtrationwere filtered
4. customThe filtrate was separated
5. washthe organic layer was washed successively with 20 mL of water and 20 mL of an aqueous saturated sodium chloride solution
6. concentrationAfter concentrated under reduced pressure, 1 mL of ethyl acetate and 2 mL of IPE
7. additionwere added to the concentration residue, crystals
8. filtrationfiltered
9. washwashed with 1.25 mL of ethyl acetate/IPE=1/1 two times
10. customVacuum drying (40° C.) to a constant weight