Abstract The syntheses of 1∶ 1??macrocycles 3 (n= 1), unsymmetrical macrocycle 5 (m= 0, n= 1), 2∶ 2??macrocycle 5 (m= n= 1 and 2), 3∶ 3 macrocycle 7, and several open??chain ethereal compounds prepared from 2, 5??dichloro??1, 3, 4??thiadiazole 1 and various polyethylene glycols dianions are described. Structural proofs are afforded by their mass and NMR spectral features. The quaternization studies of a few macrocycles with methyl ...
