Enantioselective Desymmetrization of meso-Decalin Diallylic Alcohols by a New Zr-Based Sharpless AE Process: A Novel Approach to the Asymmetric Synthesis of Polyhydroxylated Celastraceae Sesquiterpene Cores AE=Asymmetric epoxidation. Grateful acknowledgement is made to the EPSRC for a QUOTA studentship (S.J.W.) and to Pfizer (Drs. Alan R. Brown and John P. Mathias) for financial support of this work.