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Modified Amino Acid-Derived Phosphine-Imine Ligands for Palladium-Catalyzed Asymmetric Arylation of Cyclic N-Sulfonyl Imines
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DOI：10.1002/adsc.201700003.png)
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Abstract
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A series of chiral phosphine-imine ligands were synthesized starting with alpha-amino acids and examined for palladium-catalyzed asymmetric addition of arylboronic acids to cyclic N-sulfonyl imines. High catalytic activities (up to 99% yield) and high enantioselectivities (up to 98% ee) were achieved for cyclic N-sulfonyl aldimines and ketimines with five and six-membered ring structures.
Keywords:
asymmetric arylation
palladium
phosphine-imine
arylboronic acid
cyclic sulfonyl imine
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