benzyl O-(2,4,6-tri-O-benzyl-β-D-galactopyranosyl)-(1->4)-3,6-di-O-benzyl-2-O-pivaloyl-β-D-glucopyranoside 、
[(2R,3S,4S,5R,6S)-4-acetyloxy-6-[(2R,3S,4R,5R,6S)-5-(1,3-dioxoisoindol-2-yl)-4-[(2S,3S,4R,5R,6S)-6-methyl-3,4,5-tris(phenylmethoxy)oxan-2-yl]oxy-2-(phenylmethoxymethyl)-6-(2,2,2-trichloroethanimidoyl)oxyoxan-3-yl]oxy-5-phenylmethoxy-2-(phenylmethoxymethyl)oxan-3-yl] acetate 在
trifluoroborane diethyl ether 作用下,
以
1,2-二氯乙烷 为溶剂,
以10%的产率得到[(2R,3S,4S,5R,6S)-4-acetyloxy-6-[[(2R,3S,4R)-5-(1,3-dioxoisoindol-2-yl)-4-[(2S,3S,4R,5R,6S)-6-methyl-3,4,5-tris(phenylmethoxy)oxan-2-yl]oxy-2-(phenylmethoxymethyl)-3,4-dihydro-2H-pyran-3-yl]oxy]-5-phenylmethoxy-2-(phenylmethoxymethyl)oxan-3-yl] acetate