methyl (3R,5R)-7-[(1S,2S,4aR,6R,8S,8aS)-6-hydroxy-2-methyl-8-[(2S)-2-methylbutanoyl]oxy-1,2,4a,5,6,7,8,8a-octahydronaphthalen-1-yl]-3,5-dihydroxyheptanoate 在
对甲苯磺酸 作用下,
以
苯 为溶剂,
反应 4.0h,
以64.2 mg的产率得到(1S,2S,4aR,6R,8S,8aS,4'R,6'R,2''S)-6'-<2-<1,2,4a,5,6,7,8,8a-octahydro-6-hydroxy-2-methyl-8-<(2''-methyl-1''-oxobutyl)oxy>-1-naphthalenyl>ethyl>tetrahydro-4'-hydroxy-2H-pyran-2-one