4.6 Article

Interactions of C-F Bonds with Hydridoboranes: Reduction, Borylation and Friedel-Crafts Alkylation

Journal

CHEMISTRY-A EUROPEAN JOURNAL
Volume 24, Issue 60, Pages 16014-16018

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201804705

Keywords

Alkyl-fluorides; borylation; C-F reduction; Friedel-Crafts; hydridoboranes

Funding

  1. NSERC of Canada
  2. Canada Research Chair
  3. NSERC CGS-D scholarship
  4. Deutsche Forschungsgemeinschaft
  5. TU Berlin

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The stoichiometric reactions of the alkylfluorides 1-fluoroadamantane (Ad-F), fluorocyclohexane (Cy-F), 1-fluoropentane (Pent-F) and benzyl fluorides with secondary boranes pinacolborane (HBpin), catecholborane (HBcat), 9-borabicyclo(3.3.1)nonane (9-BBN) and Piers' borane (HB(C6F5)(2)) are described. While HBcat, 9-BBN and HB(C6F5)(2) reduce Ad-F to Ad-H, the latter borane was shown to react with secondary and primary fluoroalkanes, affording C-F borylation, while benzyl fluorides undergo Friedel-Crafts chemistry.

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