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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Journal ArticleDOI
Asymmetric epoxidation of unfunctionalized olefins catalyzed by Jacobsen’s catalyst on alkoxyl-modified zirconium poly (styrene-phenylvinylphosphonate)-phosphate (ZPS-PVPA)
TL;DR: New chiral Jacobsen's catalysts grafted onto alkoxyl-modified ZPS-PVPA are synthesized and applied in asymmetric epoxidations of unfunctionalized olefins as mentioned in this paper.
Book ChapterDOI
Asymmetric Epoxidation Catalyzed by Chiral Ketones
TL;DR: Chiral ketones have been developed as efficient catalysts for asymmetric alkene epoxidation in the past decades as discussed by the authors, and the development of different classes of chiral ketone catalysts have been discussed.
Journal ArticleDOI
Nutzung eines o‐Chinonmethids in der asymmetrischen Transferhydrierung: enantioselektive Synthese von Brosimin A, Brosimin B und Brosimacutin L
Anton Keßberg,Peter Metz +1 more
Journal ArticleDOI
Asymmetric Oxidation of Enol Derivatives to α-Alkoxy Carbonyls Using Iminium Salt Catalysts: A Synthetic and Computational Study
Philip C. Bulman Page,Saud M. Almutairi,Yohan Chan,G. Richard Stephenson,Yannick Gama,Ross L. Goodyear,Alice Douteau,Steven M. Allin,Garth A. Jones +8 more
TL;DR: The first examples of asymmetric oxidation of enol ether and ester substrates using iminium salt organocatalysis are reported, affording moderate to excellent enantioselectivities of up to 98% ee for tetralone-derived substrates in the α-hydroxyketone products.
Journal ArticleDOI
NHC-catalyzed β-specific addition of N-based nucleophiles to allenoates
Wenchao Wu,Shuangli Xu,Yan Zhang,Xiu Wang,Ruotong Li,Fang Sun,Chenxia Yu,Tuanjie Li,Donghui Wei,Changsheng Yao +9 more
TL;DR: DFT calculations on the possible reaction mechanisms show that the β-add addition pathway is more energetically favourable than the γ-addition pathway, which is in agreement with the experimental observations.
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.