Copper-catalysed asymmetric annulation of yne-allylic esters with amines to access axially chiral arylpyrroles

Chaochao Yao, Dan-Ran Li, Hua-Ming Xiang, Si-Jia Li, Yuepeng Lu, Zihao Wang, Tingrui Yin, Jiaqiang Wang, Kongling Feng, Cuiju Zhu and Hao Xu ()
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Chaochao Yao: Central China Normal University
Dan-Ran Li: Central China Normal University
Hua-Ming Xiang: Central China Normal University
Si-Jia Li: Central China Normal University
Yuepeng Lu: Central China Normal University
Zihao Wang: Central China Normal University
Tingrui Yin: Central China Normal University
Jiaqiang Wang: Central China Normal University
Kongling Feng: Central China Normal University
Cuiju Zhu: Central China Normal University
Hao Xu: Central China Normal University

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract The construction of atropisomers with 1,2-diaxes, while maintaining high enantiocontrol, presents a significant challenge due to the dynamic nature of steric hindrance at ortho-aryl substituents. Although various catalytic asymmetric methods have been developed for accessing axially chiral arylpyrroles, the synthesis of axially chiral arylpyrroles with 1,2-diaxes in a catalytic asymmetric manner has remained rare. Herein, the authors report the synthesis of diverse axially chiral arylpyrroles with 1,2-diaxes, and C–C and C–N axes through copper-catalysed asymmetirc [4 + 1] annulation of yne-allylic esters with arylamines via a remote stereocontrol strategy. This approach provides facile access to a broad range of heterobiaryl atropisomers (67 examples) in excellent enantioselectivities, each bearing one or two C–C/C–N axes, demonstrating its versatility and efficiency. The utility of this methodology is further highlighted by the transformation of the product into chiral phosphine ligand, and chiral thioureas for the use in asymmetric catalysis.

Date: 2024
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DOI: 10.1038/s41467-024-50896-8

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