benzyl 2,3,6,2′,6′-penta-O-(4-chlorobenzoyl)-β-D-lactoside 、
(3aR)-2-甲基-5alpha-(乙酰氧基甲基)-6beta,7alpha-二乙酰氧基-3Aalpha,6,7,7Aalpha-四氢-5H-吡喃并[3,2-d]恶唑 在
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 48.0h,
以55%的产率得到[(2R,3S,4S,5R,6S)-4-[(2S,3R,4R,5S,6R)-3-acetamido-4,5-diacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2R,3R,4S,5R,6R)-4,5-bis[(4-chlorobenzoyl)oxy]-2-[(4-chlorobenzoyl)oxymethyl]-6-phenylmethoxyoxan-3-yl]oxy-5-(4-chlorobenzoyl)oxy-3-hydroxyoxan-2-yl]methyl 4-chlorobenzoate