Journal
ORGANIC LETTERS
Volume 7, Issue 14, Pages 3089-3092Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol0511068
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The fully functionalized core structure 23 of abyssomicin C (6) containing an oxabicyclooctane ring and a tetronate was prepared via a Diels-Alder approach. After hydroxylalion of lactone 10 to the alpha-hydroxylactone 12, lactone opening led to the hydroxy ester 16. A directed epoxidation furnished the desired syn-epoxide 20. Acetylation of the tertiary hydroxyl group, followed by intramolecular Claisen condensation, gave directly the core structure 23.
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