Benzoic acid (3aR,4S,6S,6aR)-4-formyl-2-oxo-hexahydro-cyclopenta[b]furan-6-yl ester 、 (S)-4-Cyclohexyl-3-fluoro-1-(triphenyl-λ5-phosphanylidene)-butan-2-one 以90%的产率得到Benzoic acid (3aR,4R,6S,6aR)-4-((E)-(S)-5-cyclohexyl-4-fluoro-3-oxo-pent-1-enyl)-2-oxo-hexahydro-cyclopenta[b]furan-6-yl ester