Synthesis and characterization of bis[1.1.1]orthocyclophano-18-crown-6 compounds
Abstract
Two novel macrocyclic compounds 5S and 5A combining an 18-crown-6 and two cyclotriveratrylenes were synthesized by means of two methods from dibenzo-18-crown-6. The conformational isomers were separated using complexation with KSCN and their stereostructures were determined on the basis of 1H NMR spectroscopic and thermal equilibration studies.