2-((3S,3aR,4R,6S,7S,7aR)-6-Ethyl-4-hydroxy-6-iodomethyl-3-methyl-2-oxo-octahydro-benzofuran-7-yl)-acrylic acid methyl ester 在
吡啶 、
sodium acetate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 13.5h,
生成 Acetic acid (3S,3aR,4R,5aS,9aR,9bR)-5a-ethyl-3-methyl-9-methylene-2,8-dioxo-decahydro-furo[2,3-f]isochromen-4-yl ester