Volume 60, Issue 52 pp. 27247-27252
Communication

Palladium/Xiao-Phos-Catalyzed Kinetic Resolution of sec-Phosphine Oxides by P-Benzylation

Qiang Dai

Qiang Dai

School of Chemistry and Molecular Engineering and Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai, 200241 P. R. China

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Prof. Lu Liu

Corresponding Author

Prof. Lu Liu

School of Chemistry and Molecular Engineering and Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai, 200241 P. R. China

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Prof. Junliang Zhang

Corresponding Author

Prof. Junliang Zhang

Department of Chemistry, Fudan University, 2005 Songhu Road, Shanghai, 200438 P. R. China

School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan, 453007 P. R. China

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First published: 21 October 2021
Citations: 83

Dedicated to 70th anniversary of East China Normal University

Graphical Abstract

A kinetic resolution of rac-secondary phosphine oxides via the enantioselective P-benzylation process catalyzed by the palladium/Xiao-Phos was designed. Both, tert- and sec-phosphine oxides were delivered in good yield and excellent enantiopurity (selectivity factor up to 226.1). The synthetic utilities are further demonstrated by the facile preparation of several P-chiral compounds, precursors of bidentate ligands, and transition metal complexes.

Abstract

P-stereogenic tert- and sec-phosphines have wide applications in asymmetric catalysis, materials, and pharmaceutical chemistry, however, their practical synthesis still constitutes a significant challenge. Herein, a successful kinetic resolution of rac-secondary phosphine oxides via the enantioselective P-benzylation process catalyzed by the palladium/Xiao-Phos was designed. Both tert- and sec-phosphine oxides were delivered in good yield and excellent enantiopurity (selectivity factor up to 226.1). The appealing synthetic utilities are further demonstrated by the facile preparation of several valuable P-chiral compounds, precursors of bidentate ligands, as well as transition metal complexes.

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