methyl (1'R,2'R,4S,5'S,6'S)-(E)-5-(6'-acetoxymethyl-2'-trimethylsilyloxy-3'-methyl-bicyclo[3.1.1]-hept-6'-yl)-4-hydroxy-2-methyl-2-pentenoate 在
4-二甲氨基吡啶 、
4-甲基苯磺酸吡啶 、
三乙胺 作用下,
以
甲醇 、
二氯甲烷 为溶剂,
反应 48.5h,
生成 methyl (1'R,2'R,4S,5'S,6'S)-(E)-5-(6'-acetoxy methyl-2'-hydroxy-2'-methyl-bicyclo[3.1.1]hept-6'-yl)-4-tert-butyldiphenylsilyloxy-2-methyl-2-pentenoate