Efforts toward the total synthesis of (±)-toxicodenane A utilizing an oxidopyrylium-based [5+2] cycloaddition of a silicon-tethered BOC-pyranone
作者:Jacob P. Grabowski、Gregory M. Ferrence、T. Andrew Mitchell
DOI:10.1016/j.tetlet.2020.152324
日期:2020.9
Synthetic efforts toward the tricyclic core of (±)-toxicodenane A are reported. This strategy takes advantage of the Feist-Benary furan annulation, Achmatowicz oxidative rearrangement, and oxidopyrylium-based [5+2] cycloaddition to access a key tetracyclic intermediate. This work provides a foundation that can be utilized toward the totalsynthesis of the natural product.
Intramolecular cycloadditions with oxidopyrylium ylides
作者:Peter G. Sammes、Leslie J. Street
DOI:10.1039/c39820001056
日期:——
3-Oxopyrans, bearing unsaturated side Chains, can undergo intramolecular reactions, either by thermal or base-catalysed processes, to yield bicyclic adducts and affording, for example, a simple entry into the perhydroazulene system.