Synthesis of a singly bridged resorcinarene-dimer by Mannich reaction with N,N′-diethylethylenediamine and formaldehyde: self-inclusion of bridging diazahexamethylene unit in methanol

Mannich reaction of resorcin4]arene with N,N′-diethylethylenediamine and formaldehyde produced a singly bridged resorcinarene-dimer bearing sixteen hydroxyl groups at their peripheral positions, which exists in a closed capsular conformation including the diazahexamethylene bridge chain between the two resorcinarene units in CD₃OD.