Synthesis and physical-chemical properties of functional derivatives of 3-benzyl-8-propylxanthinyl-7-acetic acid


  • E. K. Mikhal’chenko Zaporizhzhia State Medical University,
  • K. V. Аleksandrova Zaporizhzhia State Medical University,
  • S. V. Levich Zaporizhzhia State Medical University,
  • A. S. Korzhova Zaporizhzhia State Medical University,



xanthines, organic synthesis, IR-spectroscopy, NMR-spectroscopy


Introduction. Synthetic research of new biologically active compounds occupies an important place in modern pharmaceutical science.Thus it is important to develop techniques for the biologically active substances functionalization. Esters and amides take special place among the variety of functional derivatives of organic acids,. These fragments are well-known pharmacophores and could be found in a wide range of drugs. Thus, the nootropic agent pyracetam is 2-oxo-1-pyrolidineacetamide, and is the selective antagonist of β-adrenoreceptores; atenolol is a derivative of benzeneacetamide. Substituted acetamide and ester fragments are also present in the structures of aprofen, spasmolitin, acetylidine and β-lactam cephalosporins and penicillins antibiotics.Aim of our research was the synthetic method development for functional derivatives of 3-benzyl-8-propylxanthinyl-7-acetic acid and the study of their physical-chemical properties.

Materials and methods. Melting points were determined using capillary method on DMP (M). 1Н NMR-spectra were recorded by Varian Mercury VX-200 device (company «Varian» – USA) solvent – (DMSO-d6), internal standard – ТМS. Elemental analysis of obtained compounds was produced on device Elementar Vario L cube. Chemical shifts were reported in ppm (parts per million) values. Infrared (IR) spectra were measured on a Bruker Alpha instrument using a potassium bromide (KBr) disk, scanning from 400 to 4000 cm-1.

Results and discussion. We selected 3-benzyl-8-propylxanthinyl-7-acetic acid as initial compound for our study. For synthesis of hexyl, heptyl, octyl, nonyl, decyl and benzyl esters of 3-benzyl-8-propylxanthinyl-7-acetic acid we used alternative method, that included alkylation of sodium salts of acids with alkyl halogens. Reaction was made at DMF medium by reflux of reagents. Next stage of our research was the synthesis of amides of 3-beznyl-8-propylxanthinyl-7-acetic acid by the reaction of ethyl or propyl esters with butylamine, benzylamine, p-methylbenzylamine or p-fluorobenzylamine. It should be noted that we conducted reaction without solvent in the medium of amine and reagents were not reflux but heated at 80 оС. The structures of all obtained compounds were proved by the elemental analysis, IR- and 1H NMR-spectroscopy.

Conclusions. Obtained results of our work can be used for further search of biological active compounds among functional derivatives of xanthinyl-7-alkanyl acids


Orlov, V. D., Lipson, V. V., & Ivanov, V. V. (2005) Medicinskaya khimiya [Medical chemistry]. Kharkiv: Folio. [in Russian].

Lieberman, M., Marks, A., & Smith, C. (2007) Marks' Essential Medical Biochemistry. Lippincott Williams & Wilkins.

Joule, J. A., & Mills, K. (2012) Heterocycles in Nature. Heterocyclic Chemistry at a Glance. (P. 158–166). Chichester: John Wiley & Sons, Ltd.

Joule, J. A., & Mills, K. (2012) Heterocycles in Medicine. Heterocyclic Chemistry at a Glance. (P. 167–179). Chichester: John Wiley & Sons, Ltd.

Müller, C. E., Sandoval-Ramírez, J., Schobert, U., Geis, U., Frobenius, W., & Klotz, K. N. (1998) 8-(Sulfostyryl)xanthines: water-soluble A2A-selective adenosine receptor antagonists. Bioorganic & Medicinal Chemistry, 6, 707–719.

Mohamed, T., Osman, W., Tin, G., & Rao, P. N. (2013) Selective inhibition of human acetylcholinesterase by xanthine derivatives: In vitro inhibition and molecular modeling investigations. Bioorganic & Medicinal Chemistry Letters, 23, 4336–4341. doi: 10.1016/j.bmcl.2013.05.092.

Mak, G., & Hanania, N. A. (2012) New bronchodilators. Curr. Op. Pharmacol., 12, 238–245.

Song, B., Xiao, T., Qi, X., Li, L. N., Qin, K., Nian, S., et al. (2012) Design and synthesis of 8-substituted benzamido-phenylxanthine derivatives as MAO-B inhibitors. Bioorganic & Medicinal Chemistry Letters, 22, 1739–1742. doi: 10.1016/j.bmcl.2011.12.094.

Mikhalchenko, E. K., Aleksandrova, E. V., Levich, S. V., & Sinchenko, D. M. (2017) Synthesis and physicochemical properties of 3-benzyl-8-propylxanthinyl-7-acetic acid and its derivatives. Current issues in pharmacy and medicine: science and practice, 1, 14–19. doi: 10.14739/2409-2932.2017.1.93430.

How to Cite

Mikhal’chenko EK, Аleksandrova KV, Levich SV, Korzhova AS. Synthesis and physical-chemical properties of functional derivatives of 3-benzyl-8-propylxanthinyl-7-acetic acid. Current issues in pharmacy and medicine: science and practice [Internet]. 2017Jun.21 [cited 2024Jun.21];(2). Available from:



Synthesis of the biologically active compounds