4.8 Article

New biphenol-based, fine-tunable monodentate phosphoramidite ligands for catalytic asymmetric transformations

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NATL ACAD SCIENCES
DOI: 10.1073/pnas.0307101101

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Monodentate phosphoramidite ligands have been developed based on enantiopure 6,6'-dimethylbiphenols with axial chirality. These chiral ligands are easy to prepare and flexible for modifications. The fine-tuning capability of these ligands plays a significant role in achieving high enantioselectivity in the asymmetric hydro-formylation of allyl cyanide and the conjugate addition of diethylzinc to cycloalkenones.

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