This paper introduces a novel method for synthesizing a cationic adhesion additive for road bitumen. The method involves condensing higher carboxylic acids and triglycerides of non-edible rapeseed oil with diethanolamine. The details of this innovative synthesis, the properties of the additive, and its action mechanism are shown in the results of this investigation. The surfactants in the synthesized products were identified by IR spectroscopy. They have significant practical implications. Different methods were used to investigate bitumen adhesion of acidic rock materials without and with additives. The results of the wetting angle study on the surface of rock materials changed from 19.81° to 80.33°, indicating a significant and remarkable improvement in its surface hydrophobicity. Moreover, the unique feature of the additive does not require dilution in organic solvents before use, which makes it highly practical for direct use.

The paper discusses a comprehensive analysis of contemporary approaches to the structural modification of phenolic acids from the benzoic (C₆–C₁) and cinnamic (C₆–C₃) series, which have a wide range of biological activity. The main directions of chemical transformation of phenolic compounds that aim to improve their pharmaco-logical potential, stability, and bioavailability are discussed. The given study also makes an accent on the relationship between the structural features and biological effects of various phenolic acid derivatives, including antioxidant, anti-inflammatory, antimicrobial, and antitumor activity. The purpose of this investigation is to systematize current data on strategies for the structural modification of phenolic acids, to identify key areas of their chemical transformation, and to determine the most promising methods for creating biologically active compounds with improved pharmacological properties. The study was aimed at systematizing the accumulated knowledge and identifying promising areas for further research in the field of structural design of phenolic acid derivatives. Based on the analysis of experimental data and literature sources, key trends in the development of new medicinal compounds using the example of natural phenolic acids were characterized, and prospects for their use in medicine and pharmaceutical chemistry were shown.

Results on the obtaining and the study of a plant growth stimulator based on 1-propyl-4-(3'-amino-1’,2’,4'-triazolo-3'-thiopropinyl) piperidin-4-ol are presented in the article. 1-propylpiperidin-4-on and 3-mercaptopropinyl-5-amin-1,2,4- triazolo were obtained with the basic parameters of the synthesis for synthesizing of 1-propyl-4-(3'-amino-1', 2', 4'-triazolo-3'-thiopropinyl) piperidin-4-ol. The structures of the obtained organic compounds were proved using IR spectroscopy and 1H and 13C NMR spectrometry. The obtained 1-propyl-4-(3’-amino-1’2’4’-triazolo-3’-thiopropynyl)-piperidine-4-ol was tested for growth-stimulating activity on spring wheat grains compared with control (water) and has proved to be a domestic growth regulator «Akpinol-alpha» (KN-2).