4.4 Article

o-Quinone methide based approach to isoflavans:: application to the total syntheses of equol, 3′-hydroxyequol and vestitol

Journal

TETRAHEDRON LETTERS
Volume 49, Issue 18, Pages 2974-2978

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2008.03.003

Keywords

o-quinone methides; Diels-Alder reaction; isoflavonoids; equol; hydroxyequol; vestitol

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A concise strategy is developed for the synthesis of isoflavans employing a Diels-Alder reaction between o-quinone methides and aryl-substituted enol ethers followed by reductive cleavage of the acetal group. The method is extended towards the total syntheses of equol, 3'-hydroxyequol and vestitol. (C) 2008 Elsevier Ltd. All rights reserved.

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