International Journal on Minority and Group Rights. Том 10. 2003. С. 203-220
New dibenzoaza-14-crowns-4 containing a fragment of γ-piperidone, in which 2,6-diaryl substituents are connected with polyethylene oxide bridges, were obtained by the Petrenko-Kritchenko reaction and then transformed by acylation into dibenzo-16-crowns-3.