cis-3-(Hydroxymethylene)-3,3a,4,6a-tetrahydro-2H-cyclopenta[b]furan-2-one 、
(3R,4S,5S)-5-bromo-3-methyl-4-phenylsulfanyl-dihydro-furan-2-one 在
silver silicate 作用下,
反应 50.0h,
以30%的产率得到(3aR,6aR)-3-[1-((2S,3S,4R)-4-Methyl-5-oxo-3-phenylsulfanyl-tetrahydro-furan-2-yloxy)-meth-(E)-ylidene]-3,3a,4,6a-tetrahydro-cyclopenta[b]furan-2-one