Nickel-Catalyzed Asymmetric Ullmann Coupling for the Synthesis of Axially Chiral Tetra-ortho-Substituted Biaryl Dials
- 29 January 2010
- journal article
- research article
- Published by American Chemical Society (ACS) in Organic Letters
- Vol. 12 (5), 1072-1075
- https://doi.org/10.1021/ol1000632
Abstract
The first example of nickel-catalyzed asymmetric Ullmann coupling of bis-ortho-substituted arylhalides is described. With the chiral BINOL-based monodentate phosphoramidite ligand, the reaction allows atropoenantioselective synthesis of a series of axially chiral tetra-ortho-substituted biaryl dials. By taking advantage on this asymmetric Ullman coupling as a key stereogenic axis-forming reaction, the formal synthesis of (+)-isoschizandrin was accomplished.This publication has 59 references indexed in Scilit:
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