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3 Polish Journal of Chemistry

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Specific Interactions of Divalent Metal Ions with Phosphonic Analogues of Dipeptide Inhibitors of Proteases

Gałęzowska J.

Polish Journal of Chemistry

2005

Vol. 79 / nr 3

603-617

Potentiometric and spectroscopic methods were used to evaluate the binding ability of two dipetides with C-terminal phosphonic group. This phopshonate moiety is quite effective in the coordination of metal ions. The two phosphinate analogues, which are very effective enzyme inhibitors, were found to be also powerful ligands for Cu2+ ions involving both amino and phosphinic groups in metal ion coordination.

Application of Isotachophoresis for Determination of Anionic Forms of Phosphonic Acids

Górecki H., Szczygieł B, Drela I.

Polish Journal of Chemistry

2004

Vol. 78 / nr 9

1691-1702

Using a capillary electrophoresis analyser, the concentrations of anionic forms of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC) and N-trismethylenephosphonic acid (NTMP) were determined by the isotachophoresis method. The measurements were performed at pH = 4.2, 6.0 and 8.0. In each case the proper leading/terminating electrolyte system was selected on the basis of literature and authors'own research. The results of isotachophoretic analyses were found to be in good agreement with the results derived from dissociation constants determined by potentiometric method. Considerable difficulties were encountered in interpretation of the results obtained for pH = 8.0 since individual steps in the isotachopherograms were fuzzy and distorted probably due to incomplete separation of the analysed sample into zones. Knowledge of the kind and concentration of ligand forms of chelating compounds, to which PBTC and NTMP belong, can be useful for reclamation of soils polluted with heavy metals.

C-Phosphorylated Azoles

Pinchuk A., Yurchenko A. A., Oshovsky G. V., Zarudnitskii E. V., Pushechnikov A. O., Tolmachev A. A.

Polish Journal of Chemistry

2001

Vol. 75, nr 8

1137-1146

A method of phosphorylation of heterocycles incorporating 1,3-azole moiety with phosphorus( III) halides is elaborated. As a result, previously unknown azolyldihalogenphosphines are prepared. Influence of heteroatom and quantity of nitrogen atoms in a cycle on the activity of azoles is studied. Reaction of 5-aminopyrazole derivatives with phosphorus(III) halides affords novel phosphorus-containing bi- and tricyclic fused systems