An Oxidative Dearomatization-Induced [5 + 2] Cascade Enabling the Syntheses of α-Cedrene, α-Pipitzol, and <i>sec</i>-Cedrenol
作者:Jason C. Green、Thomas R. R. Pettus
DOI:10.1021/ja109925g
日期:2011.2.9
biosynthesis of the tricyclic skeleton of cedrol (12). The key transformation begins with the oxidativedearomatization of curcuphenol (5a) followed by an intramolecular [5 + 2] cycloaddition of the respective phenoxonium intermediate across the tethered olefin. The benzylic stereocenter effectively guides the formation of the first two stereocenters during the [5 + 2] reaction. The cascade then terminates with