Five metal complexes of 10,10-dimethylisocorrole ligands with full -pyrrolic substitution is have been synthesized. The preparation of nickel(II), palladium(II), and copper(II) complexes was achieved by metal-templated oxidative macrocyclization of tetrapyrrolic 5,15-biladiene precursors. The reaction conditions for successful macrocycle formation in yields of 18-32 % depended strongly on the type of metal ion used. In the case of palladium, three different macrocyclic products were observed by varying the cyclization protocol. The ring-con- [a] 3077 Scheme 1. Preparation of 10,10-dimethylbiladienes 1 and 2 as hydroperchlorate salts. Reagents and conditions: a) HClO 4 (68 %), methanol.