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PyBOX-Integrated Chiral Covalent Organic Frameworks.

Fei Li1, Yun-Long Zhang1, Han-Hui Wang1

  • 1College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Normal University, Jinan, 250014, P.R. China.

Angewandte Chemie (International Ed. in English)
|June 26, 2025
PubMed
Summary

Researchers developed novel chiral covalent organic frameworks (CCOFs) by integrating pyridine-bis(oxazoline) (PyBOX) ligands. These new heterogeneous catalysts show promise for efficient asymmetric acetalization and A3-coupling reactions.

Keywords:
Asymmetric acetalization reactionChiral covalent organic frameworkChiral pool strategyPyBOX

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Area of Science:

  • Catalysis
  • Materials Science
  • Organic Chemistry

Background:

  • Chiral covalent organic frameworks (CCOFs) are emerging as potent heterogeneous catalysts.
  • Pyridine-bis(oxazoline) (PyBOX) ligands are established in homogeneous asymmetric catalysis.
  • Integrating PyBOX into COFs offers a pathway to advanced heterogeneous asymmetric catalysts.

Purpose of the Study:

  • To report the first synthesis of a PyBOX-based CCOF.
  • To evaluate its efficacy in catalytic asymmetric acetalization and A3-coupling reactions.
  • To introduce a new class of sustainable, functional heterogeneous catalysts.

Main Methods:

  • Chiral pool synthesis was employed for CCOF preparation.
  • The resulting CCOF was utilized as a heterogeneous catalyst.
  • Catalytic performance was assessed in asymmetric acetalization and A3-coupling reactions.

Main Results:

  • Successful synthesis of the first PyBOX-based CCOF.
  • Demonstrated catalytic activity in scale-up asymmetric acetalization.
  • Effective application in A3-coupling reactions, showcasing catalyst functionality.

Conclusions:

  • PyBOX-based CCOFs represent a novel and effective class of heterogeneous asymmetric catalysts.
  • This work establishes a new platform for sustainable catalyst development.
  • The developed CCOF demonstrates significant potential for practical applications in organic synthesis.