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Synthesis 1999; 1999(10): 1776-1784
DOI: 10.1055/s-1999-3597
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Enantioselective Catalysis; 130: Optically Active Expanded Ligands Based on the trans-1,2-Substituted Cyclopentane Skeleton

Henri Brunner* , Stefan Stefaniak, Manfred Zabel
  • *Institut für Anorganische Chemie, Universität Regensburg, D-93040 Regensburg, Germany; Fax + 49(9 41)9 43 44 39; E-mail: henri.brunner@chemie.uni-regensburg.de
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Publikationsdatum:
31. Dezember 1999 (online)

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New expanded bisphosphane ligands with a chiral trans-1,2-substituted cyclopentane skeleton were prepared. Polyaldehydes were accessible by coupling optically active bisphosphane precursors with branched aryl bromides. Optically active expanded ligands were obtained by condensation of the aldehydes with chiral amines and amino alcohols. The optically active ligands were tested in several model reactions of enantioselective catalysis, including allylic alkylation, hydrogenation (adopted to the use of water), and hydrosilylation.

enantioselective catalysis - expanded ligands - chiral phosphaneimines - aqueous catalysis