Stereospecific positional alkene isomerization enables bidirectional central-to-axial chirality transfer

Qi Liu, Jun Gu, Hong-Feng Zhuang and Ying He ()
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Qi Liu: Nanjing University of Science and Technology
Jun Gu: Nanjing University of Science and Technology
Hong-Feng Zhuang: Nanjing University of Science and Technology
Ying He: Nanjing University of Science and Technology

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Positional alkene isomerization is a powerful reaction for moving a C=C bond from one position to another. This transformation, as a high atom-economy and easy-to-handle process, has gained increasing prominence in both organic and material chemistry. Despite these advances, the stereospecific positional alkene isomerization to achieve bidirectional chirality transfer remains challenging. We report herein a bidirectional stereospecific positional alkene isomerization of chiral exocyclic alkene analogues by achiral Lewis base catalysis. By using this central-to-axial chirality transfer strategy, the axially chiral N-indolylquinolinones can be readily obtained from one configuration to two different configurations. Mechanistic studies indicated that the competitive alkene isomerization and Michael/retro-Michael addition would affect the conformation of exocyclic alkenes, thus achieving the bidirectional central-to-axial chirality transfer. In addition, combining the asymmetric allylic substitution-isomerization and photocatalytic Z/E isomerization, all eight stereoisomers of diaxially chiral quinolinones could be easily obtained in high enantioselectivities and diastereselectivities.

Date: 2025
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DOI: 10.1038/s41467-025-61990-w

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