Preparation of Macrocyclic Polyether-Thiono Diester and -Thiono Tetraester Ligands Containing either the Pyridine Subcyclic Unit or the Oxalyl Moiety, Their Complexes, and Their Reductive Desulfurization to Crown Ethers

Article abstract of DOI:10.1021/jo00164a001

The preparation of seven new macrocyclic polyether-thiono diesters and one new macrocyclic polyether-thiono tetraester is reported.The new macrocyclic compounds containing a pyridine subcyclic unit formed complexes with metal and alkylammonium salts.Complex formation by some of these ligands was shown by variable-temperature ¹H NMR spectroscopy and by cation transport through a CHCl₃ membrane.All of the thiono compounds were reductively desulfurized to form the corresponding crown ethers.