... This paper pre- sents syntheses of a number of related polyoxaaza macroc- ycles and some chemistry of the imine group in such rings. Synthesis from a,w-Diamines. ... (OCHzCHzN). Page 4. 1208 J. Org. Chem., Vol. 40, No. 9,1975 Krespan 100' for 4 days. ...