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Atropos but Achiral Tris(phosphanyl)biphenyl Ligands for Ru-Catalyzed Asymmetric Hydrogenation

Authors

  • Kohsuke Aikawa,

    1. Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan, Fax: (+81) 3-5734-2776
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  • Koichi Mikami Prof. Dr.

    1. Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8552, Japan, Fax: (+81) 3-5734-2776
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  • K. Aikawa is grateful to the Japan Society for the Promotion of Science for Young Scientists for a research fellowship.

Abstract

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Axial chirality is generated upon complexation of the novel triphos ligand with a metal. In the presence of the diamine dm-dabn, isomerization to the enantiopure triphos–Ru complex was observed. The dm-dabn ligand of the Ru complex exchanges with dpen at room temperature without racemization. dm-dabn=3,3′-dimethyl-2,2′-diamino-1,1′-binaphthyl, dpen=1,2-diphenylethylenediamine.

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