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Sol–Gel Catalysts as an Efficient Tool for the Kumada-Corriu Reaction in Continuous Flow

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A multichannel microreactor was fabricated to perform metal-catalyzed reactions and its efficiency was evaluated by comparing the yields and rates obtained within the micro-environment with batch processes. The microreactor was realized in glass so as to be compatible with a wide range of solvents and designed with a geometry suitable to increase the catalytic surface area and to ensure a uniform distribution of velocity and temperature. The nickel catalyst assessed was supported over the channel walls of the microreactor by gelling under controlled conditions by utilizing a silica solution containing Ni(II) salts. The sol–gel procedure allowed a porous support with a specific surface area of 387 ± 1 m2/g and catalyst particle size of 4.3 ± 1.1 nm to be generated. The multichannel microreactor was found to dramatically decrease the reaction time for the Kumada-Corriu C–C-cross coupling reactions by four orders of magnitude and to allow a three-fold increase in the yields of a biaryl compound compared with batch reactions.
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Keywords: CONTINUOUS FLOW; KUMADA-CORRIU REACTION; MICROREACTOR; NICKEL CATALYST; SOL–GEL

Document Type: Research Article

Publication date: May 1, 2013

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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