Novel Access to Polyazamacrocycles: Non‐Template Cyclization of Terephthalaldehyde and Aliphatic Polyamines

Abstract
Non‐template [2+2] condensation of terephthalaldehyde with bis(3‐aminopropyl)amine and N,N'‐bis(3‐aminopropyl)‐1,2‐diaminoethane leads to macrocyclic systems that can be reduced and derivatized further, whereas a similar reaction with bis(2‐aminoethyl)amine leads to polymeric material only.