Your browser has javascript turned off or blocked. This will lead to some parts of our website to not work properly or at all. Turn on javascript for best performance.

The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Portrait of Reine Wallenberg. Photo: Kennet Ruona

Reine Wallenberg

Professor, Coordinator Materials Science

Portrait of Reine Wallenberg. Photo: Kennet Ruona

Directed C-H Halogenation Reactions Catalysed by PdII Supported on Polymers under Batch and Continuous Flow Conditions

Author

  • Maitham H Majeed
  • Payam Shayesteh
  • Per Tunå
  • Axel R Persson
  • Roman Gritcenko
  • L Reine Wallenberg
  • Lei Ye
  • Christian Hulteberg
  • Joachim Schnadt
  • Ola F Wendt

Summary, in English

A new generation of N-heterocyclic carbene palladium(II) complexes containing vinyl groups in different positions in the backbone of the N-heterocycle have been developed. The fully characterised monomers were copolymerised with divinylbenzene to fabricate robust polymer supported NHC-PdII complexes and these polymers were applied as heterogeneous catalysts in directed C-H halogenation of arenes with a pyridine-type directing group. The catalysts demonstrated medium-high catalytic activity with up to 90 % conversion and 100 % selectivity in chlorination. They are heterogeneous and recyclable (at least six times) with no significant leaching of palladium in batch mode catalysis. The best catalyst was also applied under continuous flow conditions where it disclosed an exceptional activity (90 % conversion) and 100 % selectivity for the mono-halogenated product for at least six days, with no leaching of palladium, no loss of activity and an ability to maintain the original oxidation state of PdII .

Department/s

  • Centre for Analysis and Synthesis
  • Synchrotron Radiation Research
  • Department of Chemical Engineering
  • NanoLund
  • Pure and Applied Biochemistry

Publishing year

2019

Language

English

Pages

13591-13597

Publication/Series

Chemistry: A European Journal

Volume

25

Issue

59

Document type

Journal article

Publisher

Wiley-VCH Verlag

Topic

  • Chemical Engineering

Status

Published

ISBN/ISSN/Other

  • ISSN: 1521-3765