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Angew Chem Int Ed Engl. 2017 Dec 18;56(51):16191-16196. doi: 10.1002/anie.201708003. Epub 2017 Nov 22.

Transition-Metal-Free Catalytic Hydrodefluorination of Polyfluoroarenes by Concerted Nucleophilic Aromatic Substitution with a Hydrosilicate.

Angewandte Chemie (International ed. in English)

Kotaro Kikushima, Mary Grellier, Masato Ohashi, Sensuke Ogoshi

Affiliations

  1. Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan.
  2. Daikin Research Alliance Laboratories, Faculty of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan.
  3. Laboratoire de Chimie de Coordination (LCC), CNRS, 205 route de Narbonne, 31077, Toulouse Cedex 4, France.
  4. Université de Toulouse, UPS, INPT, 31077, Toulouse Cedex 4, France.

PMID: 29072350 DOI: 10.1002/anie.201708003

Abstract

A transition-metal-free catalytic hydrodefluorination (HDF) reaction of polyfluoroarenes is described. The reaction involves direct hydride transfer from a hydrosilicate as the key intermediate, which is generated from a hydrosilane and a fluoride salt. The eliminated fluoride regenerates the hydrosilicate to complete the catalytic cycle. Dispersion-corrected DFT calculations indicated that the HDF reaction proceeds through a concerted nucleophilic aromatic substitution (CS

© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords: defluorination; fluoroarenes; hydride transfer; nucleophilic aromatic substitution; silicates

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