Abstract
New 2,9-disubstituted 1,10-phenanthroline derivatives have been obtained, retaining the ability to form stable complexes with transition metals. Due to special, pseudotetrahedral topography of the copper(I) complexes the subsequent ring formation reaction can lead to copper(I) catenates. Thus, the known 2,9-bis(p-hydroxyphenyl)-1,10-phenanthroline ligand, was elongated by the reaction with tert-butyl bromoacetate, forming a diester capable of undergoing a double amidation reaction. Such synthetic strategy can provide the corresponding diazacoronands as well as amide-containing interlocked catenane systems, when a three-dimensional template effect of copper atom is employed.
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