Abstract
Abstract4,5,6,7-Tetrahydroisobenzofurans, corresponding to the AC(D)E ring structure of viridin and equipped with required substituents on the A-ring, were synthesized with high regio- and stereoselectivities via the Diels–Alder adduct of a furan derivative and maleic anhydride. The key steps of this work include the regioselective opening of a tetrahydrofuran ring, a stereoselective epoxidation, and an AlMe3-mediated regioselective epoxide opening followed by stereoselective C-methylation.
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