The synthesis of macrocyclic polyether‐diesters incorporating 1,10‐phenanthrolino and 1,8‐naphthyridino subunits

Abstract

Abstract The preparation of a series of macrocycles, formed by reaction of HO‐(‐CH 2 ‐CH 2 ‐O‐) n H with 1,10‐phenanthroline‐2,9‐dicarbonyl chloride (n = 2,3,4) and 1,8‐naphthyridine‐2,7‐dicarbonyl chloride (n = 3,4), is described. An improved synthetic route to 2,7‐dimethyl‐1,8‐naphthyridine 9 is also reported.