Promoted by catalytic amounts of Ni complexes tertiary alpha-hydroxyketones 1a, 3a-5a undergo rearrangement, forming chiral isomers 1b, 3b-5b. The best enantioselection was obtained with the model system 1-benzoylcyclopentanol 4a/2-hydroxy-2-phenylcyclohexanone 4b. In a ligand screening 2-[4-(S)-tert-butyloxazolin-2-yl]pyridine gave the highest enantiomeric excess of 46% (S)-4b. The analogous isomerisation reactions of alpha-hydroxyimines 6a, 7a forming chiral alpha-aminoketones 6b, 7b were established. (C) 2003 Elsevier Ltd. All rights reserved.
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Univ Stockholm, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden
Univ Stockholm, Arrhenius Lab, Berzelii Ctr EXSELENT Porous Mat, S-10691 Stockholm, SwedenUniv Stockholm, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden
Deiana, Luca
Afewerki, Samson
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Mid Sweden Univ, Dept Nat Sci Engn & Math, SE-85170 Sundsvall, SwedenUniv Stockholm, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden
Afewerki, Samson
Palo-Nieto, Carlos
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Univ Stockholm, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden
Univ Stockholm, Arrhenius Lab, Berzelii Ctr EXSELENT Porous Mat, S-10691 Stockholm, SwedenUniv Stockholm, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden
Palo-Nieto, Carlos
Verho, Oscar
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Univ Stockholm, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden
Univ Stockholm, Arrhenius Lab, Berzelii Ctr EXSELENT Porous Mat, S-10691 Stockholm, SwedenUniv Stockholm, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden
Verho, Oscar
Johnston, Eric V.
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Univ Stockholm, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden
Univ Stockholm, Arrhenius Lab, Berzelii Ctr EXSELENT Porous Mat, S-10691 Stockholm, SwedenUniv Stockholm, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden
Johnston, Eric V.
Cordova, Armando
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Univ Stockholm, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden
Univ Stockholm, Arrhenius Lab, Berzelii Ctr EXSELENT Porous Mat, S-10691 Stockholm, Sweden
Mid Sweden Univ, Dept Nat Sci Engn & Math, SE-85170 Sundsvall, SwedenUniv Stockholm, Arrhenius Lab, Dept Organ Chem, S-10691 Stockholm, Sweden
机构:
Chim ParisTech, Lab Charles Friedel, UMR CNRS 7223, F-75231 Paris 05, FranceChim ParisTech, Lab Charles Friedel, UMR CNRS 7223, F-75231 Paris 05, France
Praveen, Chandrasekaran
Montaignac, Benjamin
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Chim ParisTech, Lab Charles Friedel, UMR CNRS 7223, F-75231 Paris 05, FranceChim ParisTech, Lab Charles Friedel, UMR CNRS 7223, F-75231 Paris 05, France
Montaignac, Benjamin
Vitale, Maxime R.
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Chim ParisTech, Lab Charles Friedel, UMR CNRS 7223, F-75231 Paris 05, FranceChim ParisTech, Lab Charles Friedel, UMR CNRS 7223, F-75231 Paris 05, France
Vitale, Maxime R.
Ratovelomanana-Vidal, Virginie
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Chim ParisTech, Lab Charles Friedel, UMR CNRS 7223, F-75231 Paris 05, FranceChim ParisTech, Lab Charles Friedel, UMR CNRS 7223, F-75231 Paris 05, France
Ratovelomanana-Vidal, Virginie
Michelet, Veronique
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Chim ParisTech, Lab Charles Friedel, UMR CNRS 7223, F-75231 Paris 05, FranceChim ParisTech, Lab Charles Friedel, UMR CNRS 7223, F-75231 Paris 05, France