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Synlett 1991; 1991(4): 257-259
DOI: 10.1055/s-1991-20699
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C 2-Symmetric Bioxazolines and Bithiazolines as New Chiral Ligands for Metal Ion Catalyzed Asymmetric Syntheses: Asymmetric Hydrosilylation

Günter Helmchen* , Achim Krotz, Karl-Thilo Ganz, Dirk Hansen
  • *Organisch-Chemisches Institut der Universität, Im Neuenheimer Feld 270, D-6900 Heidelberg, Germany
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Publication Date:
07 March 2002 (online)

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New chiral C2 -symmetric bioxazolines (4,4′ -disubstituted 4,5,4′ ,5′ -tetrahydro-2,2′ -bioxazoles) and bithiazolines (4,4′ -disubstituted 4,5,4′ ,5′ -tetrahydro-2,2′ -bithiazoles) obtained in a few simple steps from amino acids were found to induce up to 84% enantiomeric excess in the rhodium(I)-catalyzed asymmetric hydrosilylation of acetophenone.