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Asymmetric Michael addition produced N–N atropisomers with multiple stereocenters

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Research area:chemistry-materialsorganic-synthesis

What the study found

The study reports that indole-derived maleimides can be desymmetrized to form N-N atropisomers, which are molecules with restricted rotation around an N-N bond that creates axial chirality. The reaction also established remote vicinal quaternary-tertiary stereocenters.

Why the authors say this matters

The authors note that N-N atropisomers are of interest because of their distinctive stereochemical properties and their presence in biologically active molecules and chiral catalysts. The findings suggest a way to build these structures with multiple stereocenters in one reaction.

What the researchers tested

The researchers tested a desymmetrization approach using asymmetric Michael addition on indole-derived maleimides. They evaluated whether the reaction could simultaneously create N-N axial chirality and remote vicinal quaternary-tertiary stereocenters.

What worked and what didn't

The reaction gave the corresponding products in excellent yield and with high stereocontrol. The abstract reports yields up to 99%, enantiomeric excess up to 99% ee, and diastereomeric ratios greater than 20:1, and it does not describe any specific cases that failed.

What to keep in mind

The available summary does not describe substrate scope, reaction conditions, or limitations. It also does not report detailed mechanistic evidence or any unsuccessful examples.

Key points

  • The study reports a route to N-N atropisomers from indole-derived maleimides.
  • The reaction was an asymmetric Michael addition used for desymmetrization.
  • It formed both N-N axial chirality and remote vicinal quaternary-tertiary stereocenters in one step.
  • The abstract reports up to 99% yield, up to 99% ee, and greater than 20:1 dr.
  • The abstract says N-N atropisomers are of interest in biologically active molecules and chiral catalysts.

Disclosure

Research title:
Asymmetric Michael addition produced N–N atropisomers with multiple stereocenters
Authors:
Pengfei Jia, Wenkai Li, Jiaru Liu, Yue Wang, Yongqiang Xu, Yuhan Zhou, Jingping Qü, Baomin Wang
Institutions:
Dalian University of Technology, Dalian University of Technology, Dalian University of Technology, Dalian University of Technology, Dalian University of Technology, Dalian University of Technology, Dalian University of Technology, Dalian University of Technology, State Key Laboratory of Chemical Engineering, State Key Laboratory of Chemical Engineering, State Key Laboratory of Chemical Engineering, State Key Laboratory of Chemical Engineering, State Key Laboratory of Chemical Engineering, State Key Laboratory of Chemical Engineering, State Key Laboratory of Chemical Engineering, State Key Laboratory of Chemical Engineering
Publication date:
2026-03-31
DOI:
10.1021/acs.orglett.6c00568
OpenAlex record:
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AI provenance: This post was generated by gpt-5.4-mini (OpenAI). The original authors did not write or review this post.

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