Journal
ORGANIC LETTERS
Volume 24, Issue 31, Pages 5797-5801Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.2c02316
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Funding
- National Natural Science Foundation of China [22071240]
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A readily available and highly modular class of chiral P,N,N-ligands have been developed and successfully applied in the Ir-catalyzed asymmetric hydrogenation. These ligands exhibited excellent activity, enantioselectivity, and substrate tolerance, thus providing optically active compounds with high yields and enantioselectivities. This study demonstrates the utility of these ligands in diverse product transformation and the synthesis of biologically active compounds.
A readily available and highly modular class of chiral P,N,N-ligands based on a structurally flexible nonchiral phosphineamine framework with an optically active 1,2-diphenylethylenediamine unit bearing a tertiary amine terminus as the chiral source have been developed and successfully applied in the Ir-catalyzed asymmetric hydrogenation of o-amidophenyl ketones. These tridentate P,N,N-ligands exhibited excellent activity, enantioselectivity, and substrate tolerance, thus furnishing various optically active o-amidobenzhydrols in up to 99% yields and with >99% ee. The utility of this protocol has been proven by synthetically diverse product transformation and highly enantioselective production of a rice plant growth regulator, (S)-inabenfide.
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