Complexes of ligands providing endogenous bridges. Part 2. The non-template synthesis of tetraimine Schiff base macrocycles derived from 1,3-diamino-2-hydroxypropane
Abstract
The synthesis of metal-free tetraimine Schiff base macrocycles derived from the (2 + 2) condensation of 1,3-diamino-2-hydroxypropane with pyrrole-2,5-dicarbaldehyde and with thiophene-2,5-dicarbaldehyde are described.