[(2R,3R,4R,6S)-3-[(2R,3S,4S,5S,6R)-4,5-dihydroxy-6-methyl-3-phenylselanyloxan-2-yl]oxy-6-methoxy-2,4-dimethyloxan-4-yl] benzoate 、
[(2S,3R,4S,5R,6R)-4-[tert-butyl(dimethyl)silyl]oxy-5-hydroxy-6-methyl-3-phenylselanyloxan-2-yl] acetate 在
三氟甲磺酸三甲基硅酯 4 A molecular sieve 作用下,
以
乙醚 为溶剂,
反应 0.25h,
以48%的产率得到[(2R,3R,4R,6S)-3-[(2R,3S,4S,5S,6R)-5-[(2S,3R,4S,5R,6R)-4-[tert-butyl(dimethyl)silyl]oxy-5-hydroxy-6-methyl-3-phenylselanyloxan-2-yl]oxy-4-hydroxy-6-methyl-3-phenylselanyloxan-2-yl]oxy-6-methoxy-2,4-dimethyloxan-4-yl] benzoate