(2S,3R)-1,4-Bis-benzyloxy-2-((1R,4R,5R,6S)-6-benzyloxy-1-ethyl-5-hydroxy-2,7-dioxa-bicyclo[2.2.1]hept-4-yl)-butane-2,3-diol 在
4-甲基苯磺酸吡啶 作用下,
以
氯仿 为溶剂,
反应 12.0h,
以90%的产率得到(1S,2R,3R,4S,5S,7R)-4-Benzyloxy-1,7-bis-benzyloxymethyl-5-ethyl-2-hydroxymethyl-6,8-dioxa-bicyclo[3.2.1]octane-2,3-diol