2,4,6-Trimethyl-benzoic acid (2R,3R,4S,5R,6R)-2,4-bis-benzyloxy-6-benzyloxymethyl-5-((2S,3R,4S,5S,6R)-3,4-bis-benzyloxy-6-benzyloxymethyl-5-hydroxy-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-3-yl ester 、
3-O-acetyl-2,4,6-tri-O-benzyl-α-D-galactopyranosyl chloride 在
silver trifluoromethanesulfonate 作用下,
以78%的产率得到[(2R,3R,4S,5R,6R)-5-[(2S,3R,4S,5S,6R)-5-[(2R,3R,4S,5S,6R)-4-acetyloxy-3,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxy-3,4-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxy-2,4-bis(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-3-yl] 2,4,6-trimethylbenzoate