Metal template reactions. XIV. Synthesis of macrocyclic metal complexes from 2,2'-(oxalyldiimino)bisbenzaldehyde and related oxamido aldehydes and ketones

Abstract

Numerous macrocylic nickel(II) complexes and occasional copper(II) and cobalt(II) complexes have been obtained from template reactions of the dialdehydes (3a-c) with diamines (4). Related complexes from the diketones (3d,e) were prepared in some cases with difficulty, but pure complexes could not be obtained from reactions incorporating the diketone (3h). The preparation and methylation of the diamine (9) has been carried out but formylation of compound (11) could not be achieved.