4.8 Article

A Mild Dihydrobenzooxaphosphole Oxazoline/Iridium Catalytic System for Asymmetric Hydrogenation of Unfunctionalized Dialins

Journal

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 52, Pages 14428-14432

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201408929

Keywords

asymmetric catalysis; imines; iridium; P,N ligands; reduction

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Air-stable P-chiral dihydrobenzooxaphosphole oxazoline ligands were designed and synthesized. When they were used in the iridium-catalyzed asymmetric hydrogenation of unfunctionalized 1-aryl-3,4-dihydronaphthalenes under one atmosphere pressure of H-2, up to 99:1 e.r. was obtained. High enantioselectivities were also observed in the reduction of the exocyclic imine derivatives of 1-tetralones.

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