92. Asymmetric michael addition of a chiral ester-dienolate: enantioselective synthesis of (–)-khusimone
    Oppolzer, W.; Pitteloud, R.; Bernardinelli, G.; Baettig, K.
    Tetrahedron Lett. 1983, 24, 4975-4978

A double π-face-selective aprotic Michael addition of the lithium dienolate derived from the chiral senecioate 2b to cyclopentenone coupled with recovery of the auxiliary serves for the enantioselective synthesis of (−)-khusimone (12) (Schemes 1 and 4).

DOI : 10.1016/S0040-4039(01)99825-9