Nickel-Catalyzed Asymmetric Hydrogenation of 2-Amidoacrylates.

Yawen Hu,Jianzhong Chen,Bowen Li,Zhenfeng Zhang,I. Gridnev,Wanbin Zhang

Published 2020 in Angewandte Chemie

ABSTRACT

Earth-abundant nickel, coordinated with a suitable bisphosphine ligand, was found to be an efficient catalyst for the asymmetric hydrogenation of 2-amidoacrylates, affording the chiral α-amino acid esters in quantitative yields and excellent enantioselectivities (up to 96% ee). The active catalyst component was studied by NMR and HRMS, which helped us to realize high catalytic efficiencyon a gram scale hydrogenation with a low catalyst loading (S/C=2000). The hydrogenated products could be simply converted to chiral α-amino acids, β-amino alcohols, and their bioactive derivatives. Furthermore, the catalytic mechanism was investigated using deuterium-labeling experiments and computational calculations.

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