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[摘要]:Highly regioselective Diels-Alder reactions of a non-protected beta-hydroxy quinone have been achieved after formation of chelated lithium alkoxides. In this report, we demonstrate on a model system, that the selectivity of reactions based on 1,3-dioxy-substituted quinones can be efficiently controlled by the addition of Lewis acid (AlMe3), which chelates the substrate by the two oxygens. |
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