(4'aS,5'S,6'R,8'aS)-4'a-Methyl-6'-[(S)-2-methyl-3-(2-methyl-[1,3]dioxolan-2-yl)-cyclopent-1-enyl]-octahydro-spiro[[1,3]dioxolane-2,2'-naphthalene]-5'-carbaldehyde 在
对甲苯磺酸 作用下,
以
丙酮 为溶剂,
生成
(2R,4aS,8aS)-2-((S)-3-Acetyl-2-methyl-cyclopent-1-enyl)-8a-methyl-6-oxo-decahydro-naphthalene-1-carbaldehyde