Nontemplate synthesis of two novel 23-membered N3O 4-donor macrocycles

Abstract

A novel 23-membered heptadentate N3O4 Schiff base ligand has been prepared by [1+1] cyclocondensation of 1,2-bis(2′- aminophenoxy)-4-t-butylbenzene with 2,6-bis(2- formylphenoxymethyl)pyridine by a nontemplate procedure. Treatment of L1 with NaBH4 in EtOH/CHCl 3 gave the di-amine macrocycle L2. © 2011 Taylor & Francis Group, LLC.