反应详情

360 mL of ethanol and 156 mL of THF were added to 26.7 g (0.71 mol, 8eq) of sodium borohydride. 39.3 g (0.35 mol, 4 eq) of calcium chloride was added at 0° C., and the mixture was stirred at 1˜3° C. for 30 minutes. A solution of 60 g (98 mmol) of ethyl 3-hydroxy-3-{6-[(methylamino)carbonyl]-2-naphthyl}-3-(1-trityl-1H-imidazol-4-yl)propanoate in 204 mL of THF was added dropwise at 0° C. The mixture was stirred at 0˜10° C. for 30 minutes, and at 20˜26° C. for 5 hours. 360 mL of water, and 1.44 liters of 1N hydrochloric acid were successively added dropwise. The mixture was stirred at 25° C. for 1 hour. Crystals were filtered, and washed with 500 mL of water two times. Vacuum drying (50° C.) to a constant weight afforded 54.5 g of 6-[1,3-dihydroxy-1-(1-trityl-1H-imidazol-4-yl)propyl]-N-methyl-2-naphthamide (yield 87%).

1. stirringThe mixture was stirred at 0˜10° C. for 30 minutes
2. waitat 20˜26° C. for 5 hours
3. stirringThe mixture was stirred at 25° C. for 1 hour
4. filtrationCrystals were filtered
5. washwashed with 500 mL of water two times
6. customVacuum drying (50° C.) to a constant weight