摘要:
A convenient and efficient synthesis of enantiomerically pure 12-. 14-, and 16-membered tetraazamacrocyclic ligands, able to form complexes with transition metal cations, is discussed. Linear alpha,omega -aminoesters, prepared from L-proline, undergo intramolecular aminolysis to afford the corresponding macrocyclic amides in good yields. (C) 2001 Elsevier Science Ltd. All rights reserved.