Synthesis and biological potential of S-derivatives of 7'-((3-mercapto-4-methyl-1,2,4-triazol-5-yl)-methyl)-3-methylxanthine

Abstract

One of the most modern strategies for the development of biologically active compounds is the active use of «privileged structures» with a certain range of known beneficial properties. The combination of fragments of such structures within one molecule with their subsequent targeted functionalization increases the probability of effective and selective interaction with certain biological targets. Therefore, the choice of 3-methylxanthine and 1,2,4-triazole for the practical implementation of this concept has a scientific basis and seems promising.
 The aim of this work has been to synthesize and evaluate the biological potential of new derivatives of 7'-((3-mercapto-4-methyl-1,2,4-triazol-5-yl)methyl)-3-methylxanthine.
 The starting 3-methylxanthine has been converted to 7'-((3-mercapto-4-methyl-1,2,4-triazol-5-yl)methyl)-3-methylxanthine by stepwise functionalization and heterocyclization. The obtained product with a thiol group has been involved in S-alkylation with halogenated carboxylic acids and their derivatives (amide, nitriles), as well as halogen ketones. The structure and individuality of the synthesized compounds have been confirmed by elemental analysis, IR and 1H NMR spectroscopy and chromatography-mass spectrometry. The compliance of the pharmacokinetic parameters and physical properties of the obtained substances with the drug-like criteria has been assessed using the SwissADME online platform.
 Under the established optimal conditions of synthesis, 9 carbonyl derivatives of 7'-((3-mercapto-4-methyl-1,2,4-triazol-5-yl)methyl)-3-methylxanthine, including carboxylic acids, nitriles, ketones and amides, have been successfully obtained. A predictive assessment of the pharmacokinetic parameters of the drug-like compounds has been carried out, which supports the feasibility of further research to create a promising biologically active substance.