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

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...

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Published inGreen chemistry : an international journal and green chemistry resource : GC Vol. 19; no. 8; pp. 1911 - 1918
Main Authors Fabry, David C, Ho, Yee Ann, Zapf, Ralf, Tremel, Wolfgang, Panthofer, Martin, Rueping, Magnus, Rehm, Thomas H
Format Journal Article
LanguageEnglish
Published 01.04.2017
Subjects
Catalysts
Contact
Falling
Photocatalysis
Photocatalysts
Reactors
Substrates
Titanium dioxide
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Summary: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.
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ISSN:1463-9262
1463-9270
DOI:10.1039/c7gc00497d