Blue light mediated C-H arylation of heteroarenes using TiO2 as an immobilized photocatalyst in a continuous-flow microreactor

David C. Fabry, Yee Ann Ho, Ralf Zapf, Wolfgang Tremel, Martin Panthöfer, Magnus Rueping*, Thomas H. Rehm

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

Titanium dioxide was applied as an immobilized photocatalyst in a microstructured falling film reactor for the continuous-flow C-H arylation of heteroarenes with aryldiazonium salts as the starting material. Detailed investigations of the catalyst and a successful long-term run proved its excellent usability for this process. Very good yields up to 99% were achieved with broad substrate scope and were compared with batch synthesis. The transfer to the continuous-flow mode revealed an impressive boost in reactor performance solely resulting from the improved irradiation and contact of the catalyst, substrate and light.

Original languageEnglish (US)
Pages (from-to)1911-1918
Number of pages8
JournalGreen Chemistry
Volume19
Issue number8
DOIs
StatePublished - 2017

Bibliographical note

Funding Information:
T. H. R. would like to thank Dr Raphael Thiermann for TEM analysis, Anja Himmelsbach for SEM and EDX analysis and Gitta Hasert for nitrogen physisorption analysis (all Fraunhofer ICT-IMM). This research has received funding from the European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement no. 617044 (SunCatChem).

Publisher Copyright:
© 2017 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution

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