3,4-二氢-2H-吡喃 、
(4S,4'R,5'S,6'S,10'R)-4-(2,6-dimethyl-3-oxo-4-allyl-5-hydroxy-10-(tert-butyldiphenylsilyloxy)undecan-2-yl)-2,2-dimethyl-1,3-dioxane 在
4-甲基苯磺酸吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 48.0h,
生成 (4S,4'R,5'S,6'S,10'R)-4-(2,6-dimethyl-3-oxo-4-allyl-5-(2H-tetrahydropyran-2-yloxy)-10-(tert-butyldiphenylsilyloxy)undecan-2-yl)-2,2-dimethyl-1,3-dioxane 、 (4S,4'R,5'S,6'S,10'S)-4-(2,6-dimethyl-3-oxo-4-allyl-5-(2H-tetrahydropyran-2-yloxy)-10-(tert-butyldiphenylsilyloxy)undecan-2-yl)-2,2-dimethyl-1,3-dioxane