M. Isabel Burguete, Santiago V. Luis, Juan F. Miravet, Lorena Payá, Manuel Querol, Enrique García-España and Conxa Soriano
Coordination patterns of tetraaza[n]paracyclophanes allow for the selective protection of three out of the four nitrogen atoms via the use of simple Zn2+ salts; accordingly, a simple method for the preparation of ditopic receptors based on polyaza[n]paracyclophanes has been devised.