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Direct conversion of macrocyclic furans into macrocyclic isothiazoles
Jérôme Guillard1, Otto Meth-Cohn, Charles W Rees
1Chemistry Department, University of Sunderland, Sunderland, UK SR1 3SD.
Chemical Communications (Cambridge, England)
|July 18, 2002
Summary
Researchers synthesized novel calixhetarenes, macrocyclic compounds containing multiple heteroatoms within their rings. X-ray crystallography confirmed the unique structure of the resulting compound 2, with all eight heteroatoms positioned on one face.
Area of Science:
- Supramolecular Chemistry
- Organic Synthesis
- Materials Science
Background:
- Calixarenes are well-established macrocyclic compounds with diverse applications.
- Incorporating multiple heteroatoms into calixarene frameworks presents synthetic challenges.
- Previous calixarene derivatives primarily featured limited heteroatom substitution patterns.
Purpose of the Study:
- To develop a facile one-step synthesis for novel calixhetarenes containing multiple heteroatoms.
- To characterize the synthesized compounds, particularly their structural features.
- To explore the potential for unique molecular architectures in calixarene chemistry.
Main Methods:
- One-step synthesis involving calix[4]furan and calix[6]furan.
- Reaction with ethyl carbamate, thionyl chloride, and pyridine.
- Characterization using X-ray crystallography.
Main Results:
- Successful preparation of novel calixhetarenes (compounds 2-7).
- X-ray crystallography of compound 2 revealed all eight heteroatoms situated on one face of the macrocycle.
- Demonstration of a versatile synthetic route for multi-heteroatom substituted calixarenes.
Conclusions:
- The study presents the first synthesis of calixhetarenes with multiple heteroatoms in the rings.
- The unique structural motif observed in compound 2 opens new avenues for supramolecular design.
- This work expands the scope of calixarene chemistry and their potential applications.