2-O-Acetyl-3,4,6,7-tetra-O-benzyl-L-glycero-α-D-manno-heptopyranosylchlorid 、
(3-{(2S,3S,4S,5S,6S)-3,5-Bis-benzyloxy-6-[(R)-1-benzyloxy-2-(dimethyl-phenyl-silanyl)-ethyl]-4-hydroxy-tetrahydro-pyran-2-yloxy}-propyl)-carbamic acid benzyl ester 在
silver trifluoromethanesulfonate 作用下,
以72%的产率得到[(2R,3S,4S,5S,6R)-6-[(1S)-1,2-bis(phenylmethoxy)ethyl]-2-[(2S,3S,4S,5S,6S)-2-[(1R)-2-[dimethyl(phenyl)silyl]-1-phenylmethoxyethyl]-3,5-bis(phenylmethoxy)-6-[3-(phenylmethoxycarbonylamino)propoxy]oxan-4-yl]oxy-4,5-bis(phenylmethoxy)oxan-3-yl] acetate