Synthesis of globular precursors

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Nanotechnology

Background:

• o-Carborane (C2 B10 H12) serves as a versatile core for constructing complex molecular architectures.
• Dendrimers and globular macromolecules offer unique properties for advanced applications.

Purpose of the Study:

• To functionalize the o-carborane framework for creating novel dendritic and dendrimer-like structures.
• To explore the potential of these new carborane-based compounds in boron neutron capture therapy.

Main Methods:

• Heck cross-coupling reactions and hydroboration were used to introduce terminal olefin groups and hydroxyl-terminated arms onto the carborane core.
• Subsequent reactions, including esterification, click chemistry, and oxonium ring opening, were performed to generate diverse terminal groups and polyanionic species.

Main Results:

• Successfully synthesized new dendritic structures using functionalized o-carboranes.
• Generated polyanionic compounds with multiple metallacarborane clusters via ring-opening reactions.
• Demonstrated the creation of diverse terminal groups, enabling various chemical transformations.

Conclusions:

• Globular icosahedral carboranes can be effectively utilized to produce new dendritic or dendrimer-like structures.
• The synthesized polyanionic compounds exhibit potential for boron neutron capture therapy due to high boron content and improved water solubility.
• These carborane-based macromolecules represent a new class of compounds with broad applicability.