STUDYING OF THE LIPOPHILICITY AND TOXICITY OF DIPHENYLACETAMIDE DERIVATIVES

Abstract

Modern approach in the study of biologically active compounds includes
the establishment of relationships between molecular structure, physicochemical properties
and the behavior which studied compound can manifest in the biological medium. These
examinantions are performed in the early stages of the design of future bioactive agent and
require the knowledge of molecular descriptors that can point to its biological activity,
including lipophilicity which occupies a key position. For the series of diphenylacetamide
derivatives, lipophilicity is determined experimentally by thin-layer chromatography on
reversed phase (RP TLC18 F254s), in mixtures of water and various organic modifiers and
computationally, by using the relevant software packages. In order to estimate the potential
acute toxicity of the tested diphenylacetamide derivatives, their effective concentrations,
EC50, on the selected test organisms have been determined. Experimentally determined
lipophilicity (RM
0 and m) is correlated with a standard measure of lipophilicity (log P), as
well as with the selected parameters of toxicity. Thus it has been found that thin-layer
chromatography on reversed phase can be used reliably for describing the lipophilicity and
for the evaluation of the toxic effects of diphenylacetamide derivatives.