Stereochemistry of Epoxidation of Some Caryophyllenols
作者:Isidro G. Collado、James R. Hanson、Peter B. Hitchcock、Antonio J. Macías-Sánchez
DOI:10.1021/jo9617979
日期:1997.4.1
Epoxidation of the caryophyllene allylic alcohols 3-5 by tert-butyl hydroperoxide/vanadyl acetylacetonate afforded the epoxides 6a, 7, and 8, respectively. The tetracyanoethylene-catalyzed solvolysis shed some light on the stereochemistry of epoxidation. Formation of trans epoxides by syn epoxidation is a consequence of the conformational flexibility of the nine-membered ring, which places the alcohol