(3R,5R)-7-[(1S,2S,4aR,6R,8S,8aS)-2,6-Dimethyl-8-((S)-2-methyl-butyryloxy)-1,2,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl]-3,5-dihydroxy-heptanoic acid methyl ester 在
吡啶 、
氢氟酸 作用下,
以
乙腈 为溶剂,
反应 2.0h,
以49%的产率得到(S)-2-Methyl-butyric acid (1S,3R,4aR,7S,8S,8aS)-8-[2-((2R,4R)-4-hydroxy-6-oxo-tetrahydro-pyran-2-yl)-ethyl]-3,7-dimethyl-1,2,3,4,4a,7,8,8a-octahydro-naphthalen-1-yl ester