β-羟基异戊酸 、 [(2S,3R,4S,5R,6S)-3-amino-4,5-dibenzoyloxy-6-[(2S,3R,4R,5S,6S)-3-benzoyloxy-2-[(2S,3S,4R,5R,6R)-5-benzoyloxy-2-methyl-3-phenylmethoxy-6-[2-(phenylmethoxycarbonylamino)ethoxy]oxan-4-yl]oxy-6-methyl-5-phenylmethoxyoxan-4-yl]oxyoxan-2-yl]methyl benzoate 在
N,N-二异丙基乙胺 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
二氯甲烷 为溶剂,
以442 mg的产率得到N-benzyloxycarbonylaminoethyl 4-(3-hydroxy-3-methylbutamido)-2,3,6-tri-O-benzoyl-4-deoxy-β-D-glucopyranosyl-(1->3)-2-O-benzoyl-4-O-benzyl-α-D-rhamnopyranosyl-(1->3)-2-O-benzoyl-4-O-benzyl-α-D-rhamnopyranoside