Furodysinin is synthesised by elaboration of (1R, 2R)-(+)-limonene oxide; key reactions include a tandem Claisen rearrangement-ene reaction and trapping of a conjugate adduct of an enone providing a bicyclic precursor of the sesquiterpene.
Furodysinin is synthesised by elaboration of (1R, 2R)-(+)-limonene oxide; key reactions include a tandem Claisen rearrangement-ene reaction and trapping of a conjugate adduct of an enone providing a bicyclic precursor of the sesquiterpene.
An enantioselective synthesis of (+)-β-himachalene (2) was accomplished starting from (1S,2R)-1,2-epoxy-p-menth-8-ene (3) in 15 or 16 steps with an overall yield of ca. 6% (Schemes 3, 5, and 6). Key transformations include an Ireland–Claisen rearrangement, a Corey oxidative cyclization, and a ring expansion.