Supported ionic liquid-like phases as organocatalysts for the solvent-free cyanosilylation of carbonyl compounds: from batch to continuous flow process

Abstract

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Rose Bengal Immobilized on Supported Ionic‐Liquid‐like Phases: An Efficient Photocatalyst for Batch and Flow Processes

“…[34][35][36] Therefore, the effect of the anion was evaluated by exchanging the Cl À anion of the RB-SILLP 26 a with BF 4 À ,N Tf 2 À ,T fO À ,a nd SbF 6 À (RB-SILLPs 27 a-30 a,S cheme 4). [34][35][36] Therefore, the effect of the anion was evaluated by exchanging the Cl À anion of the RB-SILLP 26 a with BF 4 À ,N Tf 2 À ,T fO À ,a nd SbF 6 À (RB-SILLPs 27 a-30 a,S cheme 4).…”

Covalently Supported Ionic Liquid Phases: An Advanced Class of Recyclable Catalytic Systems

“…These supports were easily transformed into imidazolium‐based materials bearing different counterions and different substituents on the heterocyclic ring. Among these materials, catalyst 28 , with a methylimidazolium unit and chloride anion (1.2 mmol g −1 ), was able to efficiently promote the cyanosilylation of carbonyl compounds using trimethylsilyl cyanide under solvent‐free conditions (Scheme ) …”

“…Amongt hese materials, catalyst 28,w ith am ethylimidazolium unit and chloride anion (1.2 mmolg À1 ), was ablet oe fficiently promotet he cyanosilylation of carbonyl compounds using trimethylsilyl cyanide under solvent-free conditions (Scheme 14). [32] Reactions werec arried out under batch conditions at room temperature over 24 ht og ive products in quantitative yields. Catalyst 28 was stable enought op roduce approximately 15 g of cyanosilyl ether per gram of catalyst used during three consecutive recycles, withouts howing any significant decrease in its activity.M oreover, 28 was employed in ac ontinuous-flow system fort he cyanosilylation of acetophenone, which allowed simple product isolation and catalyst recycling.…”

Oxodiperoxomolybdenum complex immobilized onto ionic liquid modified SBA-15 as an effective catalysis for sulfide oxidation to sulfoxides using hydrogen peroxide

“…The resulting catalyst is a solid with the active species dissolved in the IL phase and behaving as a homogeneous catalyst, thus combining the attractive features of the latter with the benefits of heterogeneous catalysis. Furthermore, SILP-catalysts are good candidates for their application for bioreactors [22,23] and for continuous-flow processes using conventional solvents or supercritical fluids [24][25][26]. For these reasons, the use of SILPs in catalysis is an emergent area and, in particular, several examples of typical oxidation reactions like epoxidation [27], alcohol oxidation [28], and olefin oxidation [29] were recently reported.…”