Synthesis and structure of polyhydroxyl rigid triangular nano-macrocyclic imine having multiple hydrogen-bonding sites

42-Membered macrocyclic oligoimines based on the rigid biphenyl framework with 12 hydroxyl groups directing inward were synthesized by six-component cyclization without using a template. In the crystalline state, six dimethylsulfoxide molecules are bound simultaneously in a nano-sized cavity via hydrogen bonds.