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Continuous flow hydrogenation of nitroarenes, azides and alkenes using maghemite-Pd nanocomposites
Rathi, A., M. Gawande, V. Ranc, J. Pechousek, M. Petr, K. Cepe, R. Varma, AND R. Zboril. Continuous flow hydrogenation of nitroarenes, azides and alkenes using maghemite-Pd nanocomposites. Catalysis Science and Technology. Royal Society of Chemistry, London, Uk, 6(1):152-160, (2016).
Prepared for submission to American Chemical Society (ACS)journal, ACS Sustainable Chemistry and Engineering.
Maghemite-supported ultra-fine Pd (1-2 nm) nanoparticles, prepared by a simple co-precipitation method, find application in the catalytic continuous flow hydrogenation of nitroarenes, azides, and alkenes wherein they play an important role in reduction of various functional groups on the surface of maghemite with low catalyst loading (~150-200 mg, ~ 6 wt%). The salient features of the protocol include expeditious formation of reduced products in high yields at near ambient conditions with recycling of the catalyst (up to 12 cycles) without any loss in selectivity and yield; barely noticeable Pd metal leaching was detected after the reactions.