NDLI: Catalytic Epoxidation and Sulfoxidation Activity of a Dioxomolybdenum(VI) Complex Bearing a Chiral Tetradentate Oxazoline Ligand

Content Provider	Springer Nature Link
Author	Neves, Patrícia Gago, Sandra Pereira, Cláudia C. L. Figueiredo, Sónia Lemos, Américo Lopes, André D. Gonçalves, Isabel S. Pillinger, Martyn Silva, Carlos M. Valente, Anabela A.
Copyright Year	2009
Abstract	A dioxomolybdenum(vi) complex bearing a tetradentate anionic N,O oxazoline ligand with four stereocenters has been studied as a catalyst in the liquid-phase epoxidation of 17 different aliphatic and aromatic olefins (including prochiral, racemate or pure enantiomers) using tert-butyl hydroperoxide as the oxidant. Epoxide selectivities of up to 100% and variable epoxide yields (3–100% within 24 h) were obtained. Although the complex generally exhibited low or no chiral induction ability, diastereoselectivity was significant in some cases (in the reaction of limonene, for example). Kinetic studies and recycling tests with the substrates cis-cyclooctene and trans-β-methylstyrene showed that the catalyst is stable and reusable, and recycling is facilitated by immobilization of the complex in a room temperature ionic liquid. Preliminary results show that the complex may have a broad substrate scope, not only for olefin epoxidation, but also for the dehydrogenation of alcohols to carbonyl compounds and the sulfoxidation of sulfides to sulfoxides.
Starting Page	94
Ending Page	103
Page Count	10
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	132
Issue Number	1-2
e-ISSN	1572879X
Language	English
Publisher	Springer US
Publisher Date	2009-06-30
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Molybdenum Chiral oxazoline Catalysis Oxidation Olefins Sulfoxidation Peroxides Ionic liquids Pharmacy Industrial Chemistry/Chemical Engineering Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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