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Design, Synthesis, and Photochemical Properties of Clickable Caged Compounds
Published on: October 15, 2019
A novel modular approach to triazole-functionalized phthalocyanines using click chemistry
Michal Jurícek1, Paul H J Kouwer, Juraj Rehák
1Institute for Molecules and Materials, Radboud University Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands.
The Journal of Organic Chemistry
|November 28, 2008
Summary
A new method synthesizes protected octaacetylene phthalocyanines efficiently. This process yields novel octatriazole-functionalized phthalocyanines capable of forming supramolecular structures.
Area of Science:
- Organic Chemistry
- Materials Science
- Supramolecular Chemistry
Background:
- Phthalocyanines are versatile macrocyclic compounds with applications in various fields.
- Developing efficient synthetic routes for functionalized phthalocyanines is crucial for advancing their applications.
- Octaacetylene and triazole moieties offer unique properties for material design.
Purpose of the Study:
- To develop an improved and efficient synthetic protocol for protected octaacetylene phthalocyanines.
- To synthesize novel octatriazole-functionalized phthalocyanines via a click chemistry approach.
- To investigate the supramolecular assembly of these novel phthalocyanines.
Main Methods:
- Two-step synthesis of 4,5-dibromophthalonitrile from 1,2-dibromobenzene using iodination and palladium-catalyzed cyanation.
- Sonogashira cross-coupling to introduce tert-butyldimethylsilyl-protected acetylene groups.
- Cyclization to form the protected octaacetylene phthalocyanine, followed by in situ deprotection and copper-catalyzed azide-alkyne cycloaddition (click reaction).
Main Results:
- A novel, efficient, and environmentally benign synthesis of protected octaacetylene phthalocyanines was achieved.
- A new class of octatriazole-functionalized phthalocyanines was successfully synthesized using a click chemistry approach.
- The synthesized triazole-derived phthalocyanines demonstrated the ability to form well-defined supramolecular structures when doped with zinc(II) triflate.
Conclusions:
- The developed protocol offers an elegant and improved method for synthesizing complex phthalocyanine derivatives.
- The facile synthesis of octatriazole-functionalized phthalocyanines opens avenues for new functional materials.
- The supramolecular self-assembly capability highlights the potential of these compounds in advanced applications.
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