(E)-5-[(1S,2R,4aR,5R,6R,8aR)-5-Hydroxy-1,2,4a,5-tetramethyl-6-(2,2,2-trichloro-acetoxy)-decahydro-naphthalen-1-yl]-3-methyl-pent-2-enoic acid methyl ester 在
sodium tetrahydroborate 、
三氟化硼乙醚 作用下,
以
乙醇 、
苯 为溶剂,
生成
(E)-3-Methyl-5-((1S,2R,4aR,5S,8aR)-1,2,4a,5-tetramethyl-6-oxo-decahydro-naphthalen-1-yl)-pent-2-enoic acid methyl ester