Journal ArticleDOI
Organocatalytic Oxidation. Asymmetric Epoxidation of Olefins Catalyzed by Chiral Ketones and Iminium Salts
O. Andrea Wong,Yian Shi +1 more
TLDR
Ketones with an Attached Chiral Moiety, Chiral Iminium Salt-Catalyzed Epoxidation, and Other Carbohydrate-Based Catalysts 3976 2.8.2.Abstract:
2.6.4. Other Carbohydrate-Based Catalysts 3976 2.7. Carbocyclic Ketones 3977 2.8. Ketones with an Attached Chiral Moiety 3979 3. Chiral Iminium Salt-Catalyzed Epoxidation 3979 3.read more
Citations
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Assembly of a Metalloporphyrin-Polyoxometalate Hybrid Material for Highly Efficient Activation of Molecular Oxygen.
TL;DR: A "step-by-step" aggregation strategy is developed that demonstrates that the collaborative work of multiple active sites in hybrid materials can achieve superior high efficiency in heterogeneous catalysis.
Journal ArticleDOI
Highly Enantioselective Epoxidation Catalyzed by Cinchona Thioureas: Synthesis of Functionalized Terminal Epoxides Bearing a Quaternary Stereogenic Center
TL;DR: Cinchona thioureas efficiently promote an unprecedented highly enantioselective epoxidation of deactivated 1,1-disubstituted alkenes to terminal epoxides containing a quaternary stereogenic center.
Journal ArticleDOI
Epoxide-Opening Cascades Triggered by a Nicholas Reaction: Total Synthesis of Teurilene†
Julio Rodríguez-López,Fernando R. Pinacho Crisóstomo,Nuria Ortega,Matías López-Rodríguez,Víctor S. Martín,Tomás Martín,Tomás Martín +6 more
TL;DR: The way in which nature approaches the synthesis of complex molecules is a great source of inspiration to organic chemists for planning a synthetic route to a natural product and cascades are considered a valuable tool for obtaining molecular complexity in a straightforward manner.
Journal ArticleDOI
Synthesis of salan (salalen) ligands derived from binaphthol for titanium-catalyzed asymmetric epoxidation of olefins with aqueous H2O2
TL;DR: A series of chiral salan ligands, easily prepared from the aldehyde derived from chiral binaphthol, are effective ligands for the titanium-catalyzed asymmetric epoxidation of olefins with aqueous H2O2 as the oxidant as discussed by the authors.
Journal ArticleDOI
Stereospecific Deoxygenation of Aliphatic Epoxides to Alkenes under Rhenium Catalysis.
TL;DR: The combination of a catalytic amount of Re2O7 and triphenyl phosphite as a reductant is effective for the deoxygenation of unactivated aliphatic epoxides to alkenes, indicating that the use of electron-deficient phosphines or phosphites is the key for the stereospecific de oxygengenation.
References
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Journal ArticleDOI
Metal-Catalyzed Epoxidations of Alkenes with Hydrogen Peroxide
Benjamin S. Lane,Kevin Burgess +1 more
TL;DR: Metal Oxides Generated in Situ 2461 4.1.
Journal ArticleDOI
Advances in Homogeneous and Heterogeneous Catalytic Asymmetric Epoxidation
TL;DR: This paper presents results of aalysis experiment conducted at the Dalian Institute of Chemical Physics of Chinese Academy of Sciences (Dalian 116023) and Jingmen Technological College (Jingmen 448000) using gas chromatography for the recovery of Na6(CO3) from Na2SO4.
Journal ArticleDOI
Green oxidation with aqueous hydrogen peroxide
TL;DR: Aqueous H2O2 is an ideal oxidant, when coupled with a tungstate complex and a quaternary ammonium hydrogensulfate as an acidic phase-transfer catalyst in an economically, technically, and environmentally satisfying manner.