(R)-methoxytrifluoromethylphenylacetyl chloride 、
(E)-5-[(1R,2S,3R,4aS,5R,8aS)-2,3-Dihydroxy-5-(3-hydroxy-propyl)-2,5,8a-trimethyl-decahydro-naphthalen-1-yl]-3-methyl-pent-2-enoic acid methyl ester 在
吡啶 作用下,
以79%的产率得到(E)-5-{(1R,2S,3R,4aS,5R,8aS)-2-Hydroxy-2,5,8a-trimethyl-3-((S)-3,3,3-trifluoro-2-methoxy-2-phenyl-propionyloxy)-5-[3-((S)-3,3,3-trifluoro-2-methoxy-2-phenyl-propionyloxy)-propyl]-decahydro-naphthalen-1-yl}-3-methyl-pent-2-enoic acid methyl ester