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Keggin heteropolyacid as catalyst for olefin epoxidation: A multiphase approach
(Elsevier Science, 2019-12-10)
Keggin-type heteropolyacids have been used as catalyst for the selective oxidation of olefins to the corresponding epoxides in multiphase conditions (isooctane/Aliquat 336/water). Multiphase system allowed achieving a ...
Dirhodium(II)-Mediated Alkene Epoxidation with Iodine(III) Oxidants
(Wiley VCH Verlag, 2018-11-01)
Dirhodium(II) complexes and iodine(III) oxidants have found useful applications in synthetic nitrene chemistry. In this study, the combination of the dirhodium(II) complex Rh2(tpa)4 (tpa = triphenylacetate) with the ...
Soybean Oil Epoxidation with Hydrogen Peroxide using an Amorphous Ti/SiO2 Catalyst
(Royal Society of Chemistry, 2004-05)
We report a study of the epoxidation of soybean oil and soybean methyl esters with hydrogen peroxide in dilute solution (6 wt%) using an amorphous heterogeneous Ti/SiO2 catalyst in the presence of tert-butyl alcohol. The ...
Ionic liquids as phase transfer catalysts: enhancing the biphasic extractive epoxidation reaction for the selective synthesis of β-O-glycosides
(Pergamon-Elsevier Science Ltd, 2017-08)
Ionic liquids promoted the direct epoxidation of glycals acting as PTC. 1,2-anhydrosugars were prepared by the oxidation of glycals under biphasic conditions with dimethydioxirane generated in situ from oxone/acetone and ...
A new and efficient methodology for olefin epoxidation catalyzed by supported cobalt nanoparticles
(Beilstein-Institut, 2021-02-22)
A new heterogeneous catalytic system consisting of cobalt nanoparticles (CoNPs) supported on MgO and tert-butylhydroperoxide (TBHP) as oxidant is presented. This CoNPs@MgO/tBuOOH catalytic combination allowed the epoxidation ...
Synthesis of Biologically Relevant β-N-Glycosides by Biphasic Epoxidation-Aminolysis of D-Glycals
(Wiley Blackwell Publishing, Inc, 2020-04)
Several β-N-glycosides were obtained upon a simple and efficient two-step methodology. First, α-1,2-anhydrosugars were prepared diastereoselectively by the oxidation of 3,4,6-tri-O-benzyl-D-glucal under biphasic conditions ...
Mild Homogeneous Synthesis of Gold Nanoparticles through the Epoxide Route: Kinetics, Mechanisms, and Related One-Pot Composites
(Wiley VCH Verlag, 2020-01)
A new one-pot homogeneous methodology at room temperature to obtain Au nanoparticles (AuNP) on the basis of the epoxide route is presented. The proposed method takes advantage of the homogenous generation of OH− moieties ...
Advance in the study of limonene epoxidation with H2O2 catalyzed by Cu(II) complex heteropolytungstates
(Elsevier Science, 2012-05-16)
The complex heteropolyoxotungstates of formula K10[M4(H2O)2(PW9O34)2]·20H2O (PWM) with M= Co(II), Zn(II), Cu(II) and Mn(II), and their precursor, Δ-Na8HPW9O34·19H2O (Δ-PW9), were evaluated as bulk in limonene epoxidation ...
Multicomponent Click Synthesis of 1,2,3-Triazoles from Epoxides in Water Catalyzed by Copper Nanoparticles on Activated Carbon
(American Chemical Society, 2011)
Degradation of the Oxirane Ring of Epoxidized Vegetable Oils in Liquid-liquid Heterogeneous Reaction Systems
(Elsevier Science Sa, 2006-12)
The reaction regimes under which proceed some of the relevant and deletereous consecutive reactions that occur during the conventional epoxidation process of vegetable oils were analyzed in detail, considering – separately ...