Synthesis and characterisation of a mesocyclic tripodal triamine ligand.

摘要: Meso- and macrocyclic polydentate amine ligands have been widely explored in oxidation catalysis for the stabilization of unstable metal-superoxide, -peroxide, -oxo intermediates. Herein we report on design synthesis a novel mesocyclic, tripodal, triamine ligand that believe will be an excellent addition to this field. We number synthetic procedures towards mesocyclic asymmetric tetraalkylated 1. expect 1 bind metals facially capping manner, yielding complexes display pseudo-tetrahedral geometry, potentially providing access unprecedented late transition metal-oxo (metal = Co, Ni, Cu). describe preparation library polyamine synthons (8, 16, 17, 18, 19) are precursors These used tailor electronic properties metal derivatives thereof. The X-ray crystal structures 19 mono- di-protonated forms 1b show crystalises boat–chair conformation which is undesirable coordination. However, solution 1H NMR studies both derivative remarkably flexible. reacted with [CuI(NCCH3)4](OTf) 1:1 copper(I) complex [CuI(NCCH3)(1b)]+.