Internally Functionalized Dendrimers Based on Fully Substituted 1,2,3-Triazoles.

Area of Science:

• Dendrimer Chemistry
• Organic Synthesis
• Supramolecular Chemistry

Background:

• Internally functionalized dendrimers (IFDs) are a key class of dendrimers, but their synthesis remains challenging.
• Existing methods for IFD construction are limited, hindering exploration of their unique properties.

Purpose of the Study:

• To report the first construction of internally functionalized dendrimers (IFDs) utilizing 1,2,3-triazole rings.
• To develop efficient synthetic protocols for creating sequence-controlled, heterolayered dendrimers with diverse branched architectures.

Main Methods:

• Utilized iridium-catalyzed annulation reactions between internal 1-thioalkynes and organic azides.
• Employed both divergent and convergent synthetic strategies for dendrimer construction.
• Characterized the synthesized dendrimers using ¹H NMR, mass spectrometry, and size exclusion chromatography.

Main Results:

• Successfully synthesized novel IFDs featuring fully substituted 1,2,3-triazole rings as interior functionality carriers.
• Achieved sequence-controlled heterolayered dendrimers with varying branched structures.
• Demonstrated high purity and well-defined architectures of the synthesized dendrimers through rigorous characterization.

Conclusions:

• Established a convenient and efficient method for constructing internally functionalized dendrimers.
• The developed synthetic approach allows for precise control over dendrimer architecture and functionality.
• This work expands the scope of dendrimer chemistry and provides access to a new class of functional materials.