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The Knoevenagel Condensation in Water
No full textThe Knoevenagel condensation is an important C-C bond forming reaction which has been extensively studied and also applied in industrial processes. Although it involves a dehydration step, the reaction can be successfully carried out in water to produce electron deficient alkenes and heterocyclic compounds such as coumarins.
Here we review our works and recent articles concerning the Knoevengel condensation in water. The review is split up in two sections: the first dealing with Knoevenagel condensations in water under heterogeneous catalysis, and the second showing examples of uncatalysed Knoevenagel condensations in wate
SILICA-BOUND DECATUNGSTATES AS HETEROGENEOUS CATALYSTS FOR H2O2 AND O2 ACTIVATION IN OXIDATION REACTIONS
No full textSilica-bound decatungstates as heterogeneous catalysts for H2O2 activation in selective sulfide oxidation
No full textAlkylammonium decatungstates were covalently anchored to silica gel, furnishing efficient and robust
heterogeneous catalysts able to activate H2O2 in the selective oxidation of sulfide to sulfoxide. The organic–
inorganic hybrid materials were fully characterized, particularly by spectroscopic experiments. Primary
propylammonium decatungstate was the most active catalyst. The use of low amounts of the heterogeneous
catalyst (0.1 mol%) with a slight excess of 30% H2O2 (1.15 equiv.) in a nonchlorinated solvent (methanol)
makes this oxidation reaction an environmentally benign chemical process. Leaching and recycling
experiments revealed that the supported catalyst is not only highly efficient but also robust, because it can
be used six times without loss of activity. Furthermore, the immobilized catalyst can tolerate different types of
reaction solvents. Finally, this procedure was successfully applied to various sulfides, including allyl phenyl
sulfide and dibenzyl sulfide
La linfoadenopatia angio-immunoblastica: Osservazioni cliniche, patologiche ed immunologiche su di un caso.
No full textThe Baeyer-Villiger oxidation of cyclohexanone to -caprolactone with hydrogen peroxide: the role of radicalic reactions
No full textThe Baeyer-Villiger oxidation of cyclohexanone to epsilon-caprolactone with hydrogen peroxide: the role of radicalic reactions
No full textThe Baeyer-Villiger oxidation of cyclohexanone to -caprolactone with hydrogen peroxide revisited: radicalic reactions control the products distribution
No full textPreparazione di Catalizzatori Eterogenei Contenenti Decatungstato per Reazioni di Ossidazione
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