反应详情

By using an analogous procedure to that described for Example 2, tert-butyl (5S,12S)-5-[2-(benzyloxy)-2-oxoethyl]-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]-3,6-dioxo-1-phenyl-2-oxa-4,7,11-triazatridecan-13-oate (20 mg, 0.018 mmol, obtained from Example 16) was hydrogenated in methanol (1.5 ml) using 10% palladium on carbon (10 mg) to provide (3S)-3-amino-4-[(3-{[(1S,2S)-2-[(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]-1-(tert-butoxycarbonyl)-2-hydroxyethyl]amino}propyl)amino]-4-oxobutanoic acid (16 mg, 99%) as a white solid.