Journal
ORGANIC LETTERS
Volume 4, Issue 14, Pages 2421-2424Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol0261736
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[GRAPHICS] A new series of ligands with a novel phosphine-aminophosphine ligation design as depicted in structure 1 has been prepared on a ferrocenylethyl backbone. These BoPhoz ligands of structure 2 have afforded exceedingly high activity and enantioselectivity in the rhodium-catalyzed asymmetric hydrogenation of dehydro-alpha-amino acid derivatives, itaconic acids, and alpha-ketoesters. These air-stable ligands are readily prepared from cost-effective and non-pyrophoric intermediates.
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