New Macrocyclic Ligands. X. 'Reinforced' Single-Ring and Three-Ring Systems Derived from a Common Series of O2N2- and O3N2-Macrocyclic Precursors

Abstract

The synthesis of new ‘reinforced’ O₂N₂- and O₃N₂-donor single macrocycles together with isomeric three-ring products is described. The new derivatives, which respectively incorporate intra- and inter-ring bridges between nitrogen donor atoms, were obtained on reaction of the parent membered macrocycles with 1,3-dibromopropane (or, in the case of the monomeric ‘reinforced’ rings, also 1,2-dibromoethane).