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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3‐ and 4‐Uloses Derived from N‐Acetyl‐D‐glucosamine: A Unique Pair of Complementary Organocatalysts for Asymmetric Epoxidation of Alkenes
Christof Schöberl,Volker Jäger +1 more
TL;DR: The 4-ulose and 3-uloses, derived in two steps from the α-methyl glycoside of N-acetyl-D-glucosamine (GlcNAc), act as organocatalysts in the asymmetric epoxidation of alkenes, with unprecedented complementary enantioselectivity as discussed by the authors.
Journal ArticleDOI
New mannose-derived ketones as organocatalysts for enantioselective dioxirane-mediated epoxidation of arylalkenes. Part 3: Chiral ketones from sugars
José M. Vega-Pérez,Ignacio Periñán,Margarita Vega-Holm,Carlos Palo-Nieto,Fernando Iglesias-Guerra +4 more
TL;DR: In this article, a tunable alkoxy group as steric sensor on carbon 2 of the sugar was synthesized by a simple method from mannopyranoside derivatives, and the new ketones were employed in the dioxirane-mediated epoxidation of a range of trans- and trisubstituted arylalkenes giving enantiomeric excesses from low to good.
Journal ArticleDOI
Efficient Aliphatic C–H Oxidation and C═C Epoxidation Catalyzed by Porous Organic Polymer-Supported Single-Site Manganese Catalysts
Journal ArticleDOI
Heterogeneous SBA-15-supported Oxoperoxomolybdenum(VI) complex for enhanced olefin epoxidation
TL;DR: The mesoporous nanomaterials, MoO 3 (sal-phz)/SBA-15 (where salphz is salicylidene 2-picoloyl hydrazine) were identified by several characterization techniques as discussed by the authors.
Journal ArticleDOI
Oxidative Kinetic Resolution of Cyclic Benzylic Ethers
TL;DR: The generality of the strategy was demonstrated and the practical approach is applicable to a wide range of 1,3-dihydroisobenzofurans bearing diverse functional groups and substituent patterns at the α position with extremely efficient enantiodiscrimination.
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.
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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.