、
(R)-4-(Dimethyl-phenyl-silanyl)-6-oxo-cyclohex-1-enecarbaldehyde 在
caesium carbonate 作用下,
以
二氯甲烷 为溶剂,
以85%的产率得到prop-2-enyl (4S,4aS,7R,8aS)-4-[(1R)-1-acetyloxy-2-[(1R,2S)-2-[[tert-butyl(diphenyl)silyl]oxymethyl]-1-methyl-5-oxocyclopentyl]ethyl]-7-[dimethyl(phenyl)silyl]-4a-formyl-2,5-dioxo-3,4,6,7,8,8a-hexahydro-1H-naphthalene-1-carboxylate