Asymmetric synthesis of β-amino acid derivatives by stereocontrolled C(sp3)-C(sp2) cross-electrophile coupling via radical 1,2-nitrogen migration

Zicheng Liao, Zijun Li, Meiqiu Xiao, Youlin Deng, Zehan Ma, Lijuan Zhou, Gangliang Dai, Xinyu Li, Shuowen Wang, Shilu Chen (), Jinheng Li () and Shi Tang ()
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Zicheng Liao: Jishou University
Zijun Li: Jishou University
Meiqiu Xiao: Jishou University
Youlin Deng: Jishou University
Zehan Ma: Beijing Institute of Technology
Lijuan Zhou: Jishou University
Gangliang Dai: Jishou University
Xinyu Li: Jishou University
Shuowen Wang: Jishou University
Shilu Chen: Beijing Institute of Technology
Jinheng Li: Qingdao University of Science and Technology
Shi Tang: Jishou University

Nature Communications, 2025, vol. 16, issue 1, 1-14

Abstract: Abstract Optically pure non-natural β-amino acids are noteworthy molecular motifs of numerous pharmaceutically important molecules. Skeletal editing of abundant α-amino acid scaffolds via tandem radical 1,2-N-shift/cross-coupling represents a powerful tool to straightforward assemble new β-amino acid molecules; however, this strategy presents substantial challenges owing to difficulties in reactivity and regio-/enantiocontrol. Herein, we report a cross-electrophile C(sp2)-C(sp3) coupling of β-bromo α-amino acid esters with aryl bromides via a π-system-independent 1,2-N-shift, which allows access to α-arylated β-amino acid motifs with high efficiency and regioselectivity. Furthermore, upon the cooperative catalysis of the Ni(II)/ cyclo-Box complex and chiral phosphoric acid, this migratory coupling further achieves high enantioselectivity control in C(sp3)–C(sp2) bond construction. In addition, detailed experimental studies and DFT calculations have been conducted to gain insight into the mechanism and origin of the enantioselectivity. Overall, this synergistic strategy expands these methods to the challenging enantioselective C(sp2)–C(sp3) cross-electrophile coupling via π-system-independent radical 1,2-amino migration.

Date: 2025
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DOI: 10.1038/s41467-025-62092-3

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