Superior catalytic efficiency of a new multi-site phase transfer catalyst in the C-alkylation of dimedone – A kinetic study

Role of Mass Transfer in Phase Transfer Catalytic Heterogeneous Reaction Systems

“…Recently, Vivekanand and Blakrishnan [29] investigated the effect of varying stirring speed on the rate of the reaction of C-alkylation of dimedone by dibromoethane in the range 200-800 rpm under PTC conditions (Scheme 2).…”

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“…Recently, the catalytic behavior of multi-site phase-transfer catalysts have attracted much attention, due to the fact that multiple molecules of the aqueous reactant can be carried into the organic phase once in a reaction cycle, the catalytic efficiency is enhanced. [8][9][10][11][12] Currently, a new analytical and process experimental techniques which are environmental benign techniques viz., ultrasound and microwave irradiation have become immensely popular in promoting various organic reactions. [13][14][15][16][17] Ultrasound irradiation is a transmission of a sound wave through a medium and is regarded as a form of energy enhancing the rate of the reaction due to mass transfer and effective mixing.…”

Recent Strategies in Organic Reactions Catalyzed by Phase Transfer Catalysts and Analyzed by Gas Chromatography

“…This technique aids in the transfer of an ionic species from either an aqueous or a solid phase into the organic phase where the chemical reaction takes place. Undoubtedly, PTC offers many substantial advantages for the practical execution of numerous reactions (Wang & Tseng, 2002;Yadav, 2004;Wang & Lee, 2007;Wang & Lee, 2006;Vivekanand & Balakrishnan, 2009a, 2009b, 2009c, 2009d.…”