Synthetically attractive chiral cyclopentenone building blocks conjugated with tetrahydro- and 2-oxotetrahydrofurans

Synthetically useful chiral building blocks (3aS,6aR)-1,3,3a,6atetrahydro-4H-cyclopenta[c]furan-4-one and (3aS,6aR)-3a,6a-dihydro-1H-cyclopenta[c]furan-1,4(3H)-dione have been synthesized via a key allylsilane–allyl alcohol fragmentation pathway using (3aS,6S,6aR)-6-(trimethylsilyl)-3,3a,6,6a-tetrahydro-1H-cyclopenta[c]furan-1-one as an illustrative example.