反应详情

1-Azido-1-deoxy-4-O-methanesulfonyl-2,3,5-tri-O-benzyl-L-xylitol (4.5 g, 7.98 mmol) is dissolved in a 1:1 mixture of ethanol and ethyl acetate (30 mL) and Palladium black (0.234 g) is added. The mixture is stirred under hydrogen at atmospheric pressure overnight. The catalyst is filtered off and the solvents evaporated under reduced pressure. Flash chromatography on silica gel and elution with a 95:5 mixture of ethyl acetate and methanol yield 2,3,5-tri-O-benzyl-1,4-dideoxy-1,4-imino-D-arabinitol (2.76 g, 86%) as an oil.

1. additionis added
2. filtrationThe catalyst is filtered off
3. customthe solvents evaporated under reduced pressure
4. washFlash chromatography on silica gel and elution
5. additionwith a 95:5 mixture of ethyl acetate and methanol