Stereoselective Synthesis of Highly Substituted γ-Lactones and Butenolides by Intramolecular Michael Addition of Enantiomerically Enriched γ-[(Phenylthio)acyl]oxy α,β-Unsaturated Esters

1. Rodríguez, C.M.
2. Martín, T.
3. Ramírez, M.A.
4. Martín, V.S.