Total Synthesis of the Quinone Epoxide Dimer (+)-Torreyanic Acid: Application of a Biomimetic Oxidation/Electrocyclization/Diels−Alder Dimerization Cascade<sup>1</sup>
作者:Chaomin Li、Richard P. Johnson、John A. Porco
DOI:10.1021/ja021396c
日期:2003.4.1
An asymmetric synthesis of the quinoneepoxide dimer (+)-torreyanic acid (48) has been accomplished employing [4 + 2] dimerization of diastereomeric 2H-pyran monomers. Synthesis of the related monomeric natural product (+)-ambuic acid (2) has also been achieved which establishes the biosynthetic relationship between these two natural products. A tartrate-mediated nucleophilic epoxidation involving