(1R,2S,4S,5S)-1-[(2R,3R,4S,5R,6R)-4-hydroxy-6-[(2R)-2-[(2R,4S,5S,6S)-4-hydroxy-5-[(2S,4R,5R,6R)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy-4,6-dimethyloxan-2-yl]oxy-3-methoxypropyl]-2-methoxy-3,5-dimethyloxan-2-yl]-4-methoxydec-8-yne-1,2,5-triol 在
对甲苯磺酸 作用下,
以
四氢呋喃 、
水 为溶剂,
反应 2.5h,
以60%的产率得到(1R,2S,4S,5S)-1-[(2R,3R,4S,5R,6R)-2,4-dihydroxy-6-[(2R)-2-[(2R,4S,5S,6S)-4-hydroxy-5-[(2S,4R,5R,6R)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy-4,6-dimethyloxan-2-yl]oxy-3-methoxypropyl]-3,5-dimethyloxan-2-yl]-4-methoxydec-8-yne-1,2,5-triol