One-Pot Synthesis of Iptycenes and Dissymmetric Triptycenes Using Ynolate-Benzyne Triple Cycloaddition

Area of Science:

• Organic Chemistry
• Supramolecular Chemistry

Background:

• Iptycenes and triptycenes are complex molecular architectures with unique properties.
• Traditional synthesis of higher-order iptycenes and dissymmetric triptycenes involves multiple, time-consuming steps.

Purpose of the Study:

• To develop a novel, efficient one-pot method for synthesizing higher-order iptycenes and dissymmetric triptycenes.
• To provide rapid access to complex molecular scaffolds for potential applications.

Main Methods:

• A two-stage triple cycloaddition reaction involving ynolate and benzynes.
• In situ formation of anthranoxide via double [2 + 2] cycloaddition.
• Subsequent Diels-Alder reaction of anthranoxide with another benzyne.

Main Results:

• Successful synthesis of noniptycenes, heptiptycenes, and pentiptycenes.
• Efficient preparation of dissymmetric triptycenes with three different aryl groups.
• Significant reduction in synthesis steps compared to conventional methods.

Conclusions:

• The developed one-pot triple cycloaddition is a highly effective method for synthesizing complex iptycenes and triptycenes.
• This approach offers a streamlined route to valuable molecular architectures.
• The method facilitates faster exploration of iptycene and triptycene chemistry and applications.