Towards the rational design of novel drugs based on solubility, partitioning/distribution, biomimetic permeability and biological activity exemplified by 1,2,4-thiadiazole derivatives

• Published in: MedChemComm Vol. 8; no. 1; pp. 162 - 175
• Main Authors: Volkova, T V, Terekhova, I V, Silyukov, O I, Proshin, A N, Bauer-Brandl, A, Perlovich, G L
• Format: Journal Article
• Language: English
• Published: England 01-01-2017
• ISSN: 2040-2503; 2040-2511
• DOI: 10.1039/c6md00545d

Novel 1,2,4-thiadiazole derivatives as potent neuroprotectors were synthesized and identified. Their ability to inhibit the glutamate stimulated Ca
uptake was investigated. The solubility of thiadiazoles was measured in a buffer solution (pH 7.4) at 298 K. The distribution coefficients in 1-octanol/buffer (pH 7.4) and 1-hexane/buffer (pH 7.4) immiscible phases as model systems imitating the gastrointestinal tract epithelium and the blood-brain barrier were determined. Permeation experiments the new Permeapad™ barrier using Franz diffusion cells were conducted and the apparent permeability coefficients were obtained. The influence of the compound structure on the physicochemical properties determining the bioavailability of drug-like substances was revealed. Solubility-permeability interplay has been assessed to evaluate potential bioavailability of the compounds studied.