Bis-urea macrocycles with a deep cavity

Chem Commun (Camb). 2015 Nov 4;51(85):15490-3. doi: 10.1039/c5cc06768e.

Abstract

Two configurational isomers of bis-urea macrocycles have been synthesized, and their neutral molecule recognition was studied by X-ray crystallography and (1)H NMR experiments. Cooperative action between the deep cavity and the urea groups and the influence of dipole alignments on molecular recognition are discussed.