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1,6-Diarylhexane-1,3,4,6-tetraones reacted with 2-aminophenol and acetone according to previously unknown pathway leading to the formation of 3-aryl-3-hydroxy-1-{5-[(2-hydroxyphenyl)amino][1,1′-biphenyl]-3-yl}prop-2-en-1-ones. Similar three-component reactions with benzylamine or 2-methoxyaniline afforded mainly 2-(4-aroyl-3-hydroxy-5,5-dimethyl-1,5-dihydro-2H-pyrrol-2-ylidene)-1-arylethan-1-ones.

The reaction of 30-bromo-3β,28-diacylbetulin with sodium azide afforded 30-azido-3β,28-diacyloxylup-20(29)-enes. The products were subjected to a CuI/TMEDA-catalyzed click reaction with ethynylferrocene to obtain the corresponding ferrocene-betulin conjugates with a 1,2,3-triazole linker.

A series of ferrocenyl-substituted methyl ketones and chalcones were synthesized and converted to unsymmetrical 4,6-disubstituted pyrimidin-2-amines and 2-(1H-pyrrol-1-yl)pyrimidines in which the ferrocene fragment is separated from the pyrimidine ring by π-deficient (pyridine) or π-excessive (thiophene) heterocycle. The forbidden band gap of the obtained compounds was determined on the basis of their UV spectra ( $$E_{\text{g}}^{\text{opt}}$$ = 1.75‒2.36 eV), and their electrochemical properties were studied. The presence of a thiophene ring between the ferrocene and pyrimidine fragments reduces the redox potential of the ferrocene fragment (20‒30 mV), whereas pyridine spacer between the ferrocene and pyrimidine fragment increases the redox potential of the ferrocene fragment by more than 100 mV.

The processes of membrane transport of ions of scandium(III), samarium(III), gadolinium(III), neodymium(III), aluminum(III), and a number of alkali and alkaline earth metals through liquid membrane impregnated with aminophosphoryl carriers of different structures were studied. Selectivity of bis (dialkylphosphinyl)amines towards scandium was found to be significantly higher than the selectivity of diphosphinylpiperazine and monophosphinylamine in particular. The dependence of transfer efficiency on the concentration of substrates and carriers was revealed. Optimal conditions for transporting rare and trace metal ions through the membrane were found, and the mechanism of transmembrane transport was discussed.

To reveal the specific features of the influence of moderate exercise (running) on the autonomic regulation of the cardiac rhythm, changes in the heart rate variability (HRV) parameters have been analyzed during three months in 292 children aged 9–14, as dependent on the sex and the baseline autonomic tone estimated by means of cluster analysis. It has been shown that, in schoolchildren engaged in running for health, HRV changes give evidence for the optimization of the mechanisms of autonomic regulation. The HRV parameters in the girls were more resistant to muscular activity compared to boys. The data obtained indicate that running for health requires a differential approach to dosing of the exercise, taking into account the sex and the baseline autonomic tone.