Synthesis and structure of new crown ethers with 1,4-phenylene and 1,4-naphthylene units

The synthesis of monomers and dimers of some new crown ether type macrocycles with 1,4-phenylene and 1,4-naphthylene units are reported. The structural investigations of the compounds were carried out by NMR spectra, MS measurements and the single crystal X-ray solid state molecular structure of one compound.