Search results for " Sonogashira Reaction"

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DEEP EUTECTIC SOLVENTS E LIQUIDI IONICI: SOLVENTI PER LO SVILUPPO DI PROCESSI ECO-COMPATIBILI

2020

L’obiettivo di questi tre anni di Dottorato è stato lo studio e l’utilizzo nuovi solventi di reazione in grado di sostituire i solventi organici classici. In particolare sono stati studiati i Deep Eutectic Solvent (DES) e le miscele di Liquidi Ionici (IL). I DES sono stati utilizzati come solventi per lo studio di reazioni organiche, usate per la formazione di nuovi legami C-C. Nello specifico sono state studiate la reazione di Diels-Alder, e diverse reazioni di coupling C-C catalizzate da Pd. In seguito, i DES sono stati utilizzati per la formazione di nuovi gel supramolecolari, chiamati eutectogel. Questi gel sono stati formati usando come gelator amminoacidi naturali, consentendo quindi …

Green Chemistry Deep Eutectic Solvents Solventi Liquidi Ionici Eutectogel gel supramolecolari Diels-Alder solventi alternativi Reazione di accoppiamento C-C Reazione di Suzuki 5-HMF Biomasse Disidratazione di carboidrati Fruttosio Glucosio Saccarosio Processi Eco-compatibili.Settore CHIM/06 - Chimica OrganicaGreen Chemistry Deep Eutectic Solvents Solvents Ionic Liquids Eutectogel supramolecular gels Diels-Alder alternative solvents Cross Coupling Reaction Suzuki Reaction Sonogashira Reaction Heck Reaction Hiyama Reaction 5-HMF Biomass carbohydrate dehydration Fructose Glucose Saccarose.
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Sustainable Approach to Waste-Minimized Sonogashira Cross-Coupling Reaction Based on Recoverable/Reusable Heterogeneous Catalytic/Base System and Ace…

2016

In this contribution, we present a chemically efficient and sustainable protocol for the palladium-catalyzed copper-free Sonogashira cross-coupling reaction, based on the use of a heterogeneous catalytic system. This consists in the combination of a palladium catalyst on highly cross-linked thiazolidine network on silica and a polystyrene-supported base. The solid catalyst/base system acts as a palladium scavenger avoiding leaching of the metal and consequent product contamination. The reaction can be conducted in safe and easily recoverable acetonitrile/water azeotrope as reaction medium. This proved to be an efficient greener alternative to the classic toxic aprotic media commonly used in…

Green chemistryAzeotrope media; Green chemistry; Heterogeneous catalysis; Sonogashira reaction; Waste minimization; Chemistry (all); Environmental Chemistry; Chemical Engineering (all); Renewable Energy Sustainability and the EnvironmentGeneral Chemical EngineeringWaste minimizationchemistry.chemical_elementSonogashira coupling010402 general chemistryHeterogeneous catalysis01 natural sciencesCoupling reactionCatalysisHeterogeneous catalysichemistry.chemical_compoundEnvironmental ChemistryOrganic chemistryChemical Engineering (all)Renewable EnergyAcetonitrileHeterogeneous catalysisSustainability and the Environment010405 organic chemistryRenewable Energy Sustainability and the EnvironmentChemistry (all)Settore CHIM/06 - Chimica OrganicaGeneral ChemistryAzeotrope mediaCombinatorial chemistry0104 chemical scienceschemistryGreen chemistryLeaching (metallurgy)Sonogashira reactionPalladiumACS Sustainable Chemistry and Engineering
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