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
Enzyme-mediated oxidations for the chemist
TL;DR: The present state of the art in the use of enzymes and microorganisms for catalytic oxidation and oxyfunctionalization chemistry is reviewed.
Journal ArticleDOI
Organocatalytic asymmetric epoxidation and aziridination of olefins and their synthetic applications.
Journal ArticleDOI
Recent advances in catalytic asymmetric epoxidation using the environmentally benign oxidant hydrogen peroxide and its derivatives.
TL;DR: A critical review discusses the advances that have been made using both metal-based and organocatalytic homogeneous catalysts to produce epoxides using environmentally benign oxidants, especially hydrogen peroxide.
Journal ArticleDOI
An organocatalytic asymmetric chlorolactonization.
TL;DR: This work represents the first example of an enantioselective reagent-controlled chlorolactonization that approaches synthetically useful enantiOSElectivities.
Journal ArticleDOI
Catalytic Asymmetric Oxygenations with the Environmentally Benign Oxidants H2O2 and O2.
TL;DR: An overview of catalyst systems capable of conducting asymmetric oxygenative transformations of organic molecules and, in line with the major trend to sustainability, relying on green oxidants H2O2 and O2 as the ultimate oxygen source is given.
References
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Journal ArticleDOI
Synthesis of l-fructose
Chyi-Cheng Chen,Roy L. Whistler +1 more
TL;DR: In this paper, the 4,6-O-isopropylidene protecting group was removed and a 3,4-anhydro-ring was formed, which was then tosylated to give a 1,3-di-O -p -tolylsulfonyl-α- l -sorbofuranoside.
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Synthesis of Cryptophycin 52 Using the Shi Epoxidation
TL;DR: A synthesis of cryptophycin 52 is reported using a Shi epoxidation strategy to install the epoxide moiety in a diastereoselective fashion.
Journal ArticleDOI
Catalytic asymmetric epoxidation of alkenes with arabinose-derived uloses
TL;DR: In this paper, four l -erythro-2-uloses were readily prepared from l -arabinose via a reaction sequence involving Fischer glycosidation, acetalization and oxidation.
Journal ArticleDOI
Electron transfer initiated heterogenerative cascade cyclizations: polyether synthesis under nonacidic conditions.
TL;DR: In this article, single-electron oxidation has been employed to initiate heterogenerative cascade cyclization reactions that form polyether compounds under essentially neutral conditions, which proceed through mesolytic benzylic carbon−carbon bond cleavages of homobenzylic ether-derived radical cations.
Journal ArticleDOI
Asymmetric epoxidation catalyzed by esters of α-hydroxy-8-oxabicyclo[3.2.1]octan-3-one
TL;DR: Several esters of α-hydroxy-8-oxabicyclo[3.2.1]octan-3-one were prepared and tested as catalysts for alkene epoxidation by Oxone® as mentioned in this paper.