methyl-<5α',6α'>-3',4',5',6',7',8'-hexahydro-6'-methyl-5'-(2-propenyl)-spiro-<1,3-dioxolan-2,2'-(1'H)-naphth>-5'-oate 在
盐酸 作用下,
以
甲醇 为溶剂,
反应 4.0h,
以21%的产率得到(1R,2R,8aS)-1-Allyl-2-methyl-6-oxo-1,2,3,4,6,7,8,8a-octahydro-naphthalene-1-carboxylic acid methyl ester