Journal
LAB ON A CHIP
Volume 4, Issue 1, Pages 38-41Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b313057f
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The Suzuki cross-coupling reaction of aryl halides with phenylboronic acid to form biaryls has been used to illustrate the development of a microwave based technique capable of delivering heat locally to a heterogeneous Pd-supported catalyst located within a micro reactor device. A 10-15 nm gold film patch, located on the outside surface of the base of a glass micro reactor, was found to efficiently assist in the heating of the catalyst when irradiated with 5-7 W of microwave power at 2.45 GHz. Using a hydrodynamically pumped system, reactant-catalyst contact times of less than 60 s were found to give conversions for different substrates which were in the range 50-99%. Two methods of loading catalysts into the micro reactor were investigated which required either 1.5 or 6 mg of material.
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