Diverse functionalization of corannulene: easy access to pentagonal superstructure

Area of Science:

• Organic Chemistry
• Materials Science

Background:

• Corannulene derivatives are valuable building blocks for complex molecular structures.
• Previous synthesis methods for penta-substituted corannulenes were limited.

Purpose of the Study:

• To develop a general and efficient method for synthesizing functionalized penta-arylcorannulene derivatives.
• To demonstrate the utility of these derivatives in constructing complex architectures.

Main Methods:

• Cross-coupling reaction between sym-pentachlorocorannulene and arylboronic acids.
• Utilized Fu's Pd(0) catalyst for high yield and chemoselectivity.
• Facile synthesis of a third-generation pentagonal dendrimer.

Main Results:

• Achieved high yields and chemoselectivity in the synthesis of various functionalized penta-arylcorannulene derivatives.
• Established a general entry point to penta-substituted corannulene derivatives.
• Successfully synthesized a complex third-generation pentagonal dendrimer.

Conclusions:

• The developed cross-coupling reaction is a powerful and versatile tool for accessing diverse penta-arylcorannulene derivatives.
• These derivatives serve as key components for advanced materials, including dendrimers and liquid crystals.
• This work expands the synthetic accessibility of complex corannulene-based nanostructures.