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Solid-phase Synthesis of [4.4] Spirocyclic Oximes
Published on: February 6, 2019
Social and antisocial [3 + 3] Schiff base macrocycles with isomeric backbones
Britta N Boden1, Joseph K-H Hui, Mark J MacLachlan
1Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1 Canada.
Researchers synthesized novel conjugated macrocycles incorporating phenanthrene. These molecules exhibit different aggregation behaviors in solution due to variations in aromatic component overlap.
Area of Science:
- Supramolecular Chemistry
- Organic Synthesis
Background:
- Schiff base condensation is a common method for synthesizing macrocyclic compounds.
- Phenanthrene-containing macrocycles are of interest for their unique photophysical properties.
Purpose of the Study:
- To synthesize novel conjugated macrocycles incorporating phenanthrene units.
- To investigate the aggregation behavior of these new macrocycles in solution.
Main Methods:
- High-yield Schiff base condensation reactions.
- Characterization of macrocyclic structures.
- Solubility and aggregation studies in chloroform.
Main Results:
- Two new phenanthrene-containing Schiff base macrocycles with 66 and 78 atoms were successfully synthesized.
- One macrocycle aggregated in chloroform, while the other did not, despite similar backbone structures.
- Aggregation differences were attributed to differential overlap of aromatic components in dimer formations.
Conclusions:
- The study demonstrates the successful synthesis of novel phenanthrene-based conjugated macrocycles.
- Subtle structural differences, specifically aromatic overlap, significantly influence macrocycle aggregation in solution.
- These findings provide insights into the design principles for controlling supramolecular assembly in macrocyclic systems.
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