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Area of Science:

  • Organic Chemistry
  • Supramolecular Chemistry

Background:

  • Macrocyclic compounds offer unique structural and reactive properties.
  • Carbazole and pyridine subunits are valuable building blocks in organic synthesis.

Purpose of the Study:

  • To explore the reactivity of a novel macrocyclic skeleton containing carbazole and pyridine.
  • To investigate the formation of elongated carbon-carbon bonds and dimeric structures.

Main Methods:

  • Synthesis of a macrocyclic motif incorporating carbazole and pyridine units linked by a carbonyl bridge.
  • Utilizing boron tribromide (BBr3) for pinacol-like coupling reactions.
  • Modifying reaction conditions to transform the carbonyl group into a methylene linker.
  • Characterization of products using spectroscopy and X-ray analysis.

Main Results:

  • A pinacol-like coupling reaction was achieved, forming a macrocycle with an elongated C-C bond.
  • Modified conditions enabled the conversion of the carbonyl (C═O) to a methylene (CH2) linker.
  • Exposure to air resulted in the formation of a dimeric molecule with multiple inter-unit bonds.

Conclusions:

  • The developed macrocyclic skeleton exhibits versatile reactivity.
  • The study demonstrates efficient methods for C-C bond formation and dimerization within macrocyclic systems.
  • The findings contribute to the synthesis of complex organic architectures.