4-Methylphenyl 6-O-acetyl-4-O-[2-acetylacetamido-3-O-(4-bromobenzyl)-6-O-tert-butyldiphenylsilyl-2-deoxy-4-O-levulinyl-alpha-D-glucopyranosyl]-2-O-benzoyl-3-O-benzyl-1-thio-alpha-L-idopyranoside 、
Methyl [2-azido-3-O-(4-bromobenzyl)-6-O-tert-butyldiphenylsilyl-2-deoxy-alpha-D-glucopyranosyl]-(1-4)-(6-O-acetyl-2-O-benzoyl-3-O-benzyl-alpha-L-idopyranosyl)-(1-4)-2-benzyloxycarbonylamino-3-O-benzoyl-2-deoxy-6-O-(2-naphthylmethyl)-alpha-D-glucopyranoside 在
N-碘代丁二酰亚胺 、
三氟甲磺酸 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以91%的产率得到[(2S,3R,4R,5S,6R)-5-[(2S,3R,4S,5R,6S)-6-(acetyloxymethyl)-5-[(2R,3R,4R,5S,6R)-5-[(2S,3R,4S,5R,6S)-6-(acetyloxymethyl)-3-benzoyloxy-5-[(2R,3R,4R,5S,6R)-4-[(4-bromophenyl)methoxy]-6-[[tert-butyl(diphenyl)silyl]oxymethyl]-3-(diacetylamino)-5-(4-oxopentanoyloxy)oxan-2-yl]oxy-4-phenylmethoxyoxan-2-yl]oxy-3-azido-4-[(4-bromophenyl)methoxy]-6-[[tert-butyl(diphenyl)silyl]oxymethyl]oxan-2-yl]oxy-3-benzoyloxy-4-phenylmethoxyoxan-2-yl]oxy-2-methoxy-6-(naphthalen-2-ylmethoxymethyl)-3-(phenylmethoxycarbonylamino)oxan-4-yl] benzoate