The preparation of a new macro-ring compound, 9, 18, 27-triaza-10, 19, 28-trioxo-35-pentatriacontanelactam, is described. A simple azide method in a mixed solvent system (water : dimethylformamide (DMF)=1 : 3) gave a good cyclization result, and the use of sodium or potassium cations as a template produced a 30% augmentation in the yield.
