[(1S,7R,8R,8aR)-8-[2-[(4R,6R)-6-(2-methoxy-2-oxoethyl)-2,2-dimethyl-1,3-dioxan-4-yl]ethyl]-7-methyl-6-oxo-2,7,8,8a-tetrahydro-1H-naphthalen-1-yl] (2S)-2-methylbutanoate 、 (E)-1-propenylmagnesium bromide 在
copper(l) iodide 、
四甲基乙二胺 作用下,
以
四氢呋喃 为溶剂,
以66%的产率得到[(1S,3S,7R,8R,8aR)-8-[2-[(4R,6R)-6-(2-methoxy-2-oxoethyl)-2,2-dimethyl-1,3-dioxan-4-yl]ethyl]-7-methyl-6-oxo-3-[(E)-prop-1-enyl]-2,3,4,7,8,8a-hexahydro-1H-naphthalen-1-yl] (2S)-2-methylbutanoate