(E)-(S)-[5-(5-hydroxy-3-methylpent-3-enyl)-2-isopropyl-5-methylcyclopent-1-enyl]propynoic acid iso-propyl ester 在
cyclopentadienylruthenium(II) trisacetonitrile hexafluorophosphate 、
N,N-二甲基甲酰胺 作用下,
以
丁酮 为溶剂,
生成 (Z)-[(5S,7aR)-3-isopropyl-5,7a-dimethyl-5-(2-oxoethyl)-1,2,5,6,7,7a-hexahydroinden-4-ylidene]acetic acid isopropyl ester 、 (E)-[(5S,7aR)-3-isopropyl-5,7a-dimethyl-5-(2-oxoethyl)-1,2,5,6,7,7a-hexahydroinden-4-ylidene]acetic acid isopropyl ester