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Synthesis 1997; 1997(1): 79-86
DOI: 10.1055/s-1997-1498
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The First Helical-Chiral Phosphane Ligands: rac-[5]- and rac-[6]-Heliphos

Andreas Terfort1 , Helmar Görls2 , Henri Brunner1
  • 1Institut für Anorganische Chemie, Universität Regensburg, D-93040 Regensburg, Germany
  • 2Max-Planck-Gesellschaft, Arbeitsgruppe CO2-Chemie, Universität Jena, Lessingstraße 12, Germany
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Publication History

Publication Date:
31 December 2000 (online)

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The syntheses of two helical, chiral phosphanes in their racemic forms are described. Their helicene backbone was built up using an improved photocyclization approach. The phosphorus functionalities were introduced in the last step. Up to now, separation of the enantiomers of the helicene phosphanes could be achieved analytically but not on a preparative scale.

helical phosphanes - enantiomeric separation - racemic mixture