ChemInform Abstract: Chiral Octahedral Complexes of Co(III) as Catalysts for Asymmetric Epoxidation of Chalcones under Phase Transfer Conditions.

Larionov, Vladimir A.; Markelova, Elina P.; Smol’yakov, Alexander F.; Savel'yeva, Tat'yana F.; Maleev, Victor I.; Belokoń, Yuri N.

doi:10.1002/chin.201604093

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“…156 Belokon and co-workers found that octahedral cobalt complexes with chiral O,N,N-donor ligands can conduct the epoxidation of chalcones with 30% aqueous H 2 O 2 (5 equiv) in two-phase media in the presence of inorganic bases. 157 Complex 62 showed the highest enantioselectivity in the series (up to 55% ee). It is worth noting that cobalt salen complexes were tested as catalysts of aerobic olefin epoxidations in the presence of aliphatic aldehydes as sacrificial reductants.…”

Section: Chemical Reviewsmentioning

confidence: 97%

Catalytic Asymmetric Oxygenations with the Environmentally Benign Oxidants H₂O₂and O₂

2017

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The discovery of simple and efficient catalyst systems for the asymmetric oxofunctionalization of hydrocarbons is a challenging task of catalytic chemistry. In this paper, we give 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 HO and O as the ultimate oxygen source. The full historical period of asymmetric oxidation catalysis (1970 to the present day) is covered; both transition-metal-based and organocatalytic systems are considered. The focus of this review is the catalytic properties of the existing catalyst systems, in particular stereoselectivity, activity, efficiency, and synthetic outlook. At the same time, mechanistic peculiarities of stereoselective oxygen transfer are given attention.

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Section: Chemical Reviewsmentioning

confidence: 97%

Catalytic Asymmetric Oxygenations with the Environmentally Benign Oxidants H₂O₂and O₂

2017

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ChemInform Abstract: Chiral Octahedral Complexes of Co(III) as Catalysts for Asymmetric Epoxidation of Chalcones under Phase Transfer Conditions.

Abstract: The same type of catalyst is found to catalyze the coupling of the obtained epoxide (IIIa) with CO2.

Cited by 1 publication

References 1 publication

Catalytic Asymmetric Oxygenations with the Environmentally Benign Oxidants H₂O₂and O₂

Catalytic Asymmetric Oxygenations with the Environmentally Benign Oxidants H₂O₂and O₂

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ChemInform Abstract: Chiral Octahedral Complexes of Co(III) as Catalysts for Asymmetric Epoxidation of Chalcones under Phase Transfer Conditions.

Abstract: The same type of catalyst is found to catalyze the coupling of the obtained epoxide (IIIa) with CO2.

Cited by 1 publication

References 1 publication

Catalytic Asymmetric Oxygenations with the Environmentally Benign Oxidants H2O2and O2

Catalytic Asymmetric Oxygenations with the Environmentally Benign Oxidants H2O2and O2

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Catalytic Asymmetric Oxygenations with the Environmentally Benign Oxidants H₂O₂and O₂

Catalytic Asymmetric Oxygenations with the Environmentally Benign Oxidants H₂O₂and O₂