Enantiomerically pure indolizidinones bearing a quaternary stereocenter were obtained by Rh(II)-catalyzed decomposition of alpha-diazo ketodiesters through a carbenoid/spiro[5,5]ammonium ylide/Stevens [1,2]-shift with a ring-expansion cascade process. The isolation of stable chiral ammonium ylides, namely the key intermediates of the process, unambiguously confirmed the stereochemistry of the total process. (C) 2004 Elsevier Ltd. All rights reserved.
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Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organomet Chem, Shanghai 200032, Peoples R ChinaChinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organomet Chem, Shanghai 200032, Peoples R China
Jiang, B
Xu, M
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Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organomet Chem, Shanghai 200032, Peoples R ChinaChinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organomet Chem, Shanghai 200032, Peoples R China
机构:
Stockholm Univ, Arrhenius Lab, Dept Organ Chem, SE-10691 Stockholm, SwedenStockholm Univ, Arrhenius Lab, Dept Organ Chem, SE-10691 Stockholm, Sweden
Zhao, Gui-Ling
Dziedzic, Pawel
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Stockholm Univ, Arrhenius Lab, Dept Organ Chem, SE-10691 Stockholm, SwedenStockholm Univ, Arrhenius Lab, Dept Organ Chem, SE-10691 Stockholm, Sweden
Dziedzic, Pawel
Ullah, Farman
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Stockholm Univ, Arrhenius Lab, Dept Organ Chem, SE-10691 Stockholm, SwedenStockholm Univ, Arrhenius Lab, Dept Organ Chem, SE-10691 Stockholm, Sweden
Ullah, Farman
Eriksson, Lars
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Stockholm Univ, Arrhenius Lab, Dept Struct Chem, SE-10691 Stockholm, SwedenStockholm Univ, Arrhenius Lab, Dept Organ Chem, SE-10691 Stockholm, Sweden
Eriksson, Lars
Cordova, Armando
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Stockholm Univ, Arrhenius Lab, Dept Organ Chem, SE-10691 Stockholm, SwedenStockholm Univ, Arrhenius Lab, Dept Organ Chem, SE-10691 Stockholm, Sweden