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Taming the radical cation intermediate enabled one-step access to structurally diverse lignans

Author

Listed:
  • Jia-Chen Xiang

    (Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304
    Southeast University)

  • Cédric Fung

    (Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304)

  • Qian Wang

    (Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304)

  • Jieping Zhu

    (Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304)

Abstract

Lignans, in spite of their structural diversity, are all biosynthetically derived from coniferyl alcohol. We report herein a divergent synthesis of lignans from biomass-derived monolignols in a short synthetic sequence. Blue LED irradiation of a dichloromethane solution of dicinnamyl ether derivatives in the presence of Cu(TFA)2, an alcohol (2.0 equiv) and a catalytic amount of Fukuzumi’s salt affords the C7-alkoxylated aryltetralin cyclic ethers. Increasing the amount of alcohol under otherwise identical conditions diverts the reaction course to furnish the C7,C7’-dialkoxylated dibenzyltetrahydrofurans, while replacing Cu(TFA)2 with diphenyl disulfide (PhSSPh) provides selectively the C7-monoalkoxylated dibenzyltetrahydrofurans. Aza-, thia- and carba-analogues of lignans are equally accessible by simply changing the tethering atom of the allylic alcohols. Concise total syntheses of aglacins A, E, F, brassilignan, and dehydrodimethylconidendrin are documented featuring these transformations.

Suggested Citation

  • Jia-Chen Xiang & Cédric Fung & Qian Wang & Jieping Zhu, 2022. "Taming the radical cation intermediate enabled one-step access to structurally diverse lignans," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-31000-4
    DOI: 10.1038/s41467-022-31000-4
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    References listed on IDEAS

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    1. Xu Bao & Takayuki Yokoe & Tu M. Ha & Qian Wang & Jieping Zhu, 2018. "Copper-catalyzed methylative difunctionalization of alkenes," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
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