Cation complexing properties of synthetic macrocyclic polyether-diester ligands containing the pyridine subcyclic unit

Cyclophanes as Synthetic Analogs of Enzymes and Receptors

“…Thus, the indicated CH 2 groups in the complex, shown diagrammatically in 13a and 13b, were observable as an AB system at -80°C, which coalesced to a singlet above -40°C. The structural variation was 15 extended considerably in subsequent work, 73 and systems 16-19 were shown to be highly effective hosts that showed considerable discrimination between various types of alkali metal cations and also between different alkylammonium cations. The free energies of activation for this process were shown to vary with guest and host structure 59 ' 6090 and to be related to the free energy of association (AG a ) between the two components.…”

Piridin egységet tartalmazó királis koronaéterek néhány alkalmazása

“…7,8 A piridino-18-korona-6-éterek üregmérete leginkább a K + ionok, illetve a hasonló méretû NH 4 + ionok, így a protonált primer aminok komplexálását is lehetõvé teszi. 4 Az enantiomertiszta piridino-koronaéter-származékok enantiomerfelismerését tanulmányozva megállapították, hogy képesek különbséget tenni a királis protonált primer aminok, aminosavak és aminosav-származékok enantiomerjei között.…”

Synthesis and X-Ray Single Crystal Study of 3-Dibutynyl and 4-Dipentynyl Pyridine-2,6-Dicarboxylate

“…Macrocyclic compound is an important reference compound in chemistry studies such as complexation to metal due to existence electron donating atom in the ligand [8][9]. Some of macrocyclic derivatives have been reported showing great capability in antibacterial, anticancer and HIV treatment [10][11][12][13][14].…”