乙酸酐 、
3-Acetyl-15-hydroxyleptocarpin 在
吡啶 作用下,
反应 1.0h,
以78 mg的产率得到(Z)-2-Methyl-but-2-enoic acid (Z)-(1aR,3S,5aR,8aR,9R,10aR)-3-acetoxy-4-acetoxymethyl-10a-methyl-8-methylene-7-oxo-1a,2,3,5a,7,8,8a,9,10,10a-decahydro-1,6-dioxa-cyclopenta[a]cyclopropa[e]cyclodecen-9-yl ester