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Palladium-free, highly efficient mesoporous tin silicates catalytic acyl Sonogashira coupling reaction

By K Reddy, M Suresh, M Kantam, S Bhargava and P Srinivasu


Three-dimensional mesoporous tin silicates (PS-2) with different Si/Sn mole ratios are synthesized by direct hydrothermal treatment via a soft-templating technique under acidic conditions. The first example of PS-2 catalysts composed of tunable textural properties and designed to overcome the problems associated with stoichiometric acetylenic Grignard reagents and large amounts of uneconomical Pd catalysts indeed shows that a new synthetic approach toward direct acyl Sonogashira coupling reaction through C-C coupling has been developed under palladium metal- and ligand-free conditions. Both aromatic and aliphatic alkynes could react with acid halides to produce ynones and its derivatives under solvent-free conditions

Topics: Catalysis and Mechanisms of Reactions
Publisher: American Chemical Society (United States)
Year: 2014
DOI identifier: 10.1021/ie501305x
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