Journal
CHINESE JOURNAL OF CHEMISTRY
Volume 41, Issue 1, Pages 21-26Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.202200441
Keywords
Asymmetric catalysis; Heterocycles; Total synthesis; 2-Pyrones; Inverse-electron-demand Diels-Alder reaction; Cycloaddition
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A unified approach for the synthesis of chiral heteroatom-containing bicyclic derivatives using lanthanide-catalyzed reactions has been reported. This method provides a step-economical synthetic platform for the synthesis of densely functionalized cis-hydroindoles and cis-hydrobenzofurans with high yields and enantioselectivities, and has demonstrated synthetic utility.
Comprehensive Summary Chiral heteroatom-containing bicyclic scaffolds are important pharmacophores and prevalent in bioactive natural products and drug molecules. Herein, we report a unified approach for the divergent synthesis of chiral heteroatom-containing bicyclic derivatives by lanthanide (III)-catalyzed asymmetric inverse-electron-demand Diels-Alder reactions of 2-pyrones. These reactions occur with various readily available dihydropyrroles and dihydrofurans as dienophiles, providing a step-economical synthetic platform for densely functionalized cis-hydroindoles and cis-hydrobenzofurans with excellent yields and enantioselectivities. The synthetic utility of this approach is demonstrated by the concise synthesis of (-)-alpha-lycorane and (-)-lycorine alkaloids.
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