Synthesis of 1,3,5-alternate azacalix[3]pyridine[3]pyrimidine and its complexation with fullerenes via multiple π/π and CH/π interactions.

Azacalix[3]pyridine[3]pyrimidine was synthesized efficiently by means of a [3+3] fragment coupling approach. Adopting a preorganized symmetric 1,3,5-alternate conformation, the macrocycle formed complexes with fullerenes through the multiple intramolecular π/π and CH/π interactions. This journal is © The Royal Society of Chemistry 2011