Synthesis of Macrocyclic Arenes with Expanded Cavities from Seven‐Membered‐Ring‐Fused Monomers

Numerous macrocyclic arenes have been synthesized from various types of aromatic monomers. However, the rotation of monomer units often reduces the internal cavity volume. To address this issue, seven-membered-ring-fused monomers were employed for the synthesis of macrocyclic arenes. The fusion of aromatic units via seven-membered rings introduces a bent geometry into the macrocyclic framework, which reduces conformational flexibility and helps preserve a stable and expanded internal cavity in both solution and solid states.