Recyclable supported Pd-NHC catalytic systems for the copper free Sonogashira cross-coupling in flow
Sustainable Chemistry and Pharmacy
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Penafiel, I., Martinez-Lombardia, A., Godard, C., Claver, C., & Lapkin, A. (2018). Recyclable supported Pd-NHC catalytic systems for the copper free Sonogashira cross-coupling in flow. Sustainable Chemistry and Pharmacy, 9 69-75. https://doi.org/10.1016/j.scp.2018.06.003
A new family of well-defined NHC-Pd complexes immobilised onto silica, alumina and titania is reported. The catalysts display activity and recyclability in the Sonogashira cross-coupling reactions under batch and continuous flow conditions. Under batch conditions the new catalytic systems were recycled up to four times with yields over 80%. These catalysts have a broad substrate scope of different aryl bromides and alkynes. The titania-supported catalysts show good conversions under continuous flow conditions at least over 8 hours on stream using MeOH as solvent.
The research leading to these results has received funding from the European Research Council under the European Union's Seventh Framework Programme (EC FP7) Grant Agreement n. [NMP2-SL-2012-280827]. The authors are grateful to TECSPR14-1-0045; TECNIOspring programme, the Agency for Business Competitiveness of the Government of Catalonia, ACCIÓ, the Generalitat de Catalunya (2014SGR670). and the Spanish Ministerio de Economía y Competitividad (CTQ2016-75016-R) for financial support.
Centre Tecnol�gic de la Qu�mica de Catalunya (CTQC)
External DOI: https://doi.org/10.1016/j.scp.2018.06.003
This record's URL: https://www.repository.cam.ac.uk/handle/1810/287819