反应详情

tert-Butyl (5S,12S)-12-[(R)-[(3R,4R,5R)-3,4-bis{[tert-butyl(dimethyl)silyl]oxy}-5-(3-(4-methoxybenzyl)-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl)tetrahydro-2-furanyl](hydroxy)methyl]-5-[(1S)-1-hydroxy-2-methylpropyl]-3,6-dioxo-1-phenyl-2-oxa-4,7,11-triazatridecan-13-oate (208 mg, 0.2 mmol, obtained from Example 1) was hydrogenated in methanol (2 ml) using 10% palladium on carbon (42 mg) under atmospheric pressure to provide tert-butyl (2S,3R)-2-[(3-{[(2S,3S)-2-amino-3-hydroxy-4-methylpentanoyl]amino}propyl)amino]-3-[(3R,4R,5R)-3,4-bis{[tert-butyl(dimethyl)silyl]oxy}-5-(3-(4-methoxybenzyl)-2,4-dioxo-3,4-dihydro-1(2H)-pyrimidinyl)tetrahydro-2-furanyl]-3-hydroxypropanoate (167 mg, 92%) as a white amorphous solid.