α-Silyl Sulfones as Latent α-Sulfonyl Anions. Fluoride-Promoted Intramolecular 1,2-Additions to Aldehydes as the Basis of a New Cyclopentenylation Strategy

Article abstract of DOI:10.1021/jo00288a058

Conjugate Addition of allylpotassium to vinyl sulfones 8 and 23 followed by carbon silylation provides α-silyl sulfones 9d and 24b.These materials are transformed to aldehydes 11 and 26, which subsequently undergo smooth fluoride-induced cyclopentannulati