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The isocyanide SN2 reaction

Author

Listed:
  • Pravin Patil

    (Palackӯ University in Olomouc
    University of Groningen)

  • Qiang Zheng

    (University of Groningen)

  • Katarzyna Kurpiewska

    (Jagiellonian University)

  • Alexander Dömling

    (Palackӯ University in Olomouc
    University of Groningen)

Abstract

The SN2 nucleophilic substitution reaction is a vital organic transformation used for drug and natural product synthesis. Nucleophiles like cyanide, oxygen, nitrogen, sulfur, or phosphorous replace halogens or sulfonyl esters, forming new bonds. Isocyanides exhibit unique C-centered lone pair σ and π* orbitals, enabling diverse radical and multicomponent reactions. Despite this, their nucleophilic potential in SN2 reactions remains unexplored. We have uncovered that isocyanides act as versatile nucleophiles in SN2 reactions with alkyl halides. This yields highly substituted secondary amides through in situ nitrilium ion hydrolysis introducing an alternative bond break compared to classical amide synthesis. This novel 3-component process accommodates various isocyanide and electrophile structures, functional groups, scalability, late-stage drug modifications, and complex compound synthesis. This reaction greatly expands chemical diversity, nearly doubling the classical amid coupling’s chemical space. Notably, the isocyanide nucleophile presents an unconventional Umpolung amide carbanion synthon (R-NHC(-) = O), an alternative to classical amide couplings.

Suggested Citation

  • Pravin Patil & Qiang Zheng & Katarzyna Kurpiewska & Alexander Dömling, 2023. "The isocyanide SN2 reaction," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-41253-2
    DOI: 10.1038/s41467-023-41253-2
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