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- W2952179944 abstract "A series of P-stereogenic monodentate phosphoramidite (PNO2) and phosphorodiamidite (PN2O) ligands based on chiral Betti bases has been prepared by modular synthetic procedures. The chirality at the phosphorus can be controlled to a large extent by the synthetic route, leading to stereoselective access to single P-epimers. The absolute configuration of the P-atom was assigned by X-ray diffraction analysis. The new ligands were evaluated in asymmetric catalysis and the influence of the exocyclic amine or alcohol moiety as well as the interplay between the P-chirality and the stereocenters in the backbone were investigated. Enantioselectivities of up to 85 and 83 % ee were obtained in the Rh-catalyzed hydrogenation of dimethyl itaconate and in the Pd-catalyzed allylic amination of (rac)-(E)-1,3-diphenylallyl acetate with benzylamine, respectively. In the Ni-catalyzed hydrovinylation of styrene, ee values of up to 68 %, excellent chemoselectivities, and high activities (TOFav up to 3000 h–1) were achieved." @default.
- W2952179944 created "2019-06-27" @default.
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- W2952179944 date "2016-01-01" @default.
- W2952179944 modified "2023-09-27" @default.
- W2952179944 title "ChemInform Abstract: Synthesis of P-Stereogenic Phosphoramidite and Phosphorodiamidite Ligands and Their Application in Asymmetric Catalysis." @default.
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- W2952179944 doi "https://doi.org/10.1002/chin.201607021" @default.
- W2952179944 hasPublicationYear "2016" @default.
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