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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Exploration of an epoxidation-ring-opening strategy for the synthesis of lyconadin A and discovery of an unexpected Payne rearrangement.
TL;DR: In the context of synthetic efforts targeting the alkaloid lyconadin A, scalemic epoxide 25 was prepared by a highly stereoselective sequence involving a Myers alkylation and a Shi epoxidation, but ring-opening of this epoxide with a vinylcopper complex afforded alcohol instead of the expected product.
Journal ArticleDOI
Mo Schiff base-tungstate ionic hybrid with enhanced heterogeneous catalytic activity for epoxidation reactions
TL;DR: In this article, a novel metal Schiff base-tungstate ionic hybrid (Mo-MimAM-WO 4 ) was prepared by anion exchange of Mo Schiff base functionalized imidazole ionic liquid with sodium tungstate, and its catalytic activity was studied for the epoxidation of alkenes using aqueous H 2 O 2 as the oxidant.
Journal ArticleDOI
Phosphonium salt induced stereoselective allylic rearrangement during chlorination of α-hydroxyallylphosphinates
TL;DR: In this paper, α-hydroxyallylphosphates were converted to γ-chloro allylphosphinates when treated with Ph3P and CCl4, via substitution of hydroxyl and migration of double bond.
Journal ArticleDOI
Activating tert-butyl hydroperoxide by chelated vanadates for stereoselectively preparing sidechain-functionalized tetrahydrofurans.
TL;DR: The reaction model additionally implements results from vanadium-51 NMR spectroscopy and density functional theory, and exerts in the preferred end-on conformation almost no effect on structure and bonding of the peroxide group in tert-butylperoxy vanadates.
Reference EntryDOI
Discussion Addendum for: Synthesis of 1,2:4,5-Di-o-isopropylidene–D-erythro-2,3-hexodiulo-2,6-pyranose. A Highly Enantioselective Ketone Catalyst for Epoxidation/Asymmetric Epoxidation of trans-β-Methylstyrene and 1-Phenylcyclohexene using a D-Fructose-derived Ketone: (R,R)-trans-β–Methylstyrene Oxide and (R,R)-1-Phenylcyclohexene Oxide
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.