Proton‐ionizable crown compounds. 19. The synthesis of chiral dialkyl‐substituted triazolo‐18‐crown‐6 macrocycles

Four new chiral macrocyclic polyether ligands containing the proton‐ionizable triazole subcyclic unit have been prepared. The triazolo‐crowns contain two isopropyl, two isobutyl, two (S)‐sec‐butyl or two benzyl substituents on chiral macro ring carbon atoms. A racemic triazolo‐18‐crown‐6 containing two (1‐naphthoxy)methyl substituents was also prepared.