4.8 Article

Click-connected ligand scaffolds: Macrocyclic chelates for asymmetric hydrogenation

Journal

ORGANIC LETTERS
Volume 10, Issue 4, Pages 545-548

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ol702890s

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Funding

  1. NCRR NIH HHS [RR016544, SIG-1-510-RR-06307] Funding Source: Medline

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Click chemistry is used to construct ligand scaffolds for a series of chiral diphosphites. Enantioselectivity as high as 97% ee is obtained using these click ligands in rhodium-catalyzed asymmetric hydrogenation. Control experiments and spectroscopic data suggest that a 16-membered PP-macrocyclic Rh(I) chelate is formed.

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