TY  - JOUR
AU  - Savić, Jelena
AU  - Vitnik, Vesna
AU  - Obradović, Darija
AU  - Vitnik, Željko
AU  - Petrić, Vanja
AU  - Čkalovski, Teodora
AU  - Lazović, Saša
AU  - Crevar, Milkica
PY  - 2023
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5444
AB  - The retention behavior of 10 previously synthesized α,β-unsaturated acids that exhibited antimicrobial activity was studied using 12 reversed-phase thin-layer chromatography (RP-TLC) systems. The mobile phases consisted of three solvent combinations (methanol‒water, acetonitrile‒water, and acetone‒water) in four different ratios (50:50, 60:40, 70:30, and 80:20, V/V). The chromatographic parameters RM0 , a, and C0 were calculated for each system. The lipophilicity parameters of the tested compounds were predicted using various computational methods. The acetone‒water system demonstrated the highest correlation coefficients between the chromatographic and calculated lipophilicity parameters, which makes it the most suitable for evaluating the lipophilicity of the tested compounds. This system successfully reflected the effect of the lipophilic properties of the compounds on their retention behavior. To elucidate the retention mechanisms, the molecular properties of the tested compounds were calculated and a genetic algorithm was used to identify the properties with the greatest influence on the retention behavior. The interpretation of these descriptors revealed structural and physicochemical properties crucial for the behavior of the tested compounds. In addition, the pharmacokinetic properties of the compounds were estimated using in silico methods. The observed correlation between the retention mechanism and physicochemical properties affecting membrane transport and physiological binding ability highlights the applicability of RP-TLC conditions for rapid profiling of newly synthesized α,β-unsaturated acids.
PB  - Springer
T2  - Journal of Planar Chromatography - Modern TLC
T1  - Reversed-phase thin-layer chromatographic and computational evaluation of lipophilicity parameters of α,β-unsaturated acids
VL  - 36
IS  - 5
SP  - 415
EP  - 423
DO  - 10.1007/s00764-023-00274-9
ER  - 

@article{
author = "Savić, Jelena and Vitnik, Vesna and Obradović, Darija and Vitnik, Željko and Petrić, Vanja and Čkalovski, Teodora and Lazović, Saša and Crevar, Milkica",
year = "2023",
abstract = "The retention behavior of 10 previously synthesized α,β-unsaturated acids that exhibited antimicrobial activity was studied using 12 reversed-phase thin-layer chromatography (RP-TLC) systems. The mobile phases consisted of three solvent combinations (methanol‒water, acetonitrile‒water, and acetone‒water) in four different ratios (50:50, 60:40, 70:30, and 80:20, V/V). The chromatographic parameters RM0 , a, and C0 were calculated for each system. The lipophilicity parameters of the tested compounds were predicted using various computational methods. The acetone‒water system demonstrated the highest correlation coefficients between the chromatographic and calculated lipophilicity parameters, which makes it the most suitable for evaluating the lipophilicity of the tested compounds. This system successfully reflected the effect of the lipophilic properties of the compounds on their retention behavior. To elucidate the retention mechanisms, the molecular properties of the tested compounds were calculated and a genetic algorithm was used to identify the properties with the greatest influence on the retention behavior. The interpretation of these descriptors revealed structural and physicochemical properties crucial for the behavior of the tested compounds. In addition, the pharmacokinetic properties of the compounds were estimated using in silico methods. The observed correlation between the retention mechanism and physicochemical properties affecting membrane transport and physiological binding ability highlights the applicability of RP-TLC conditions for rapid profiling of newly synthesized α,β-unsaturated acids.",
publisher = "Springer",
journal = "Journal of Planar Chromatography - Modern TLC",
title = "Reversed-phase thin-layer chromatographic and computational evaluation of lipophilicity parameters of α,β-unsaturated acids",
volume = "36",
number = "5",
pages = "415-423",
doi = "10.1007/s00764-023-00274-9"
}

Savić, J., Vitnik, V., Obradović, D., Vitnik, Ž., Petrić, V., Čkalovski, T., Lazović, S.,& Crevar, M.. (2023). Reversed-phase thin-layer chromatographic and computational evaluation of lipophilicity parameters of α,β-unsaturated acids. in Journal of Planar Chromatography - Modern TLC
Springer., 36(5), 415-423.
https://doi.org/10.1007/s00764-023-00274-9

Savić J, Vitnik V, Obradović D, Vitnik Ž, Petrić V, Čkalovski T, Lazović S, Crevar M. Reversed-phase thin-layer chromatographic and computational evaluation of lipophilicity parameters of α,β-unsaturated acids. in Journal of Planar Chromatography - Modern TLC. 2023;36(5):415-423.
doi:10.1007/s00764-023-00274-9 .

Savić, Jelena, Vitnik, Vesna, Obradović, Darija, Vitnik, Željko, Petrić, Vanja, Čkalovski, Teodora, Lazović, Saša, Crevar, Milkica, "Reversed-phase thin-layer chromatographic and computational evaluation of lipophilicity parameters of α,β-unsaturated acids" in Journal of Planar Chromatography - Modern TLC, 36, no. 5 (2023):415-423,
https://doi.org/10.1007/s00764-023-00274-9 . .

TY  - JOUR
AU  - Savić, Jelena
AU  - Marković, Bojan
AU  - Vitnik, Vesna
AU  - Dilber, Sanda
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3032
AB  - pKa values of five β-hydroxy-β-arylalkanoic acids and ibuprofen were determined using the RP-HPLC method. Stationary phase was octadecyl modified (C-18) silica gel, and mobile phase was a mixture of methanol and one of nine different buffers (60:40, v/v). wspH values were measured after mixing methanol with an appropriate buffer. The mean retention time of each compound was plotted against wspH of each mobile phase. The inflection point of each sigmoidal curve represented wspK a of the compound. Using wspK a in already known equations for the specific methanol/buffer mixture, wwpK a values were calculated. Obtained pKa values for synthesized compounds were in a narrow range from 3.34-3.81 and pKa for ibuprofen was 4.45. Predicted pKa values for these compounds in SPARC software showed good correlation with experimental pKa values (R2=0.8048).
PB  - Univerzitet u Kragujevcu - Prirodno-matematički fakultet, Kragujevac
T2  - Kragujevac Journal of Science
T1  - Determination of ionization constants (PKA) of β-hydroxy-β-arylalkanoic acids using high-pressure liquid chromatography
IS  - 40
SP  - 103
EP  - 111
DO  - 10.5937/KgJSci1840103S
ER  - 

@article{
author = "Savić, Jelena and Marković, Bojan and Vitnik, Vesna and Dilber, Sanda",
year = "2018",
abstract = "pKa values of five β-hydroxy-β-arylalkanoic acids and ibuprofen were determined using the RP-HPLC method. Stationary phase was octadecyl modified (C-18) silica gel, and mobile phase was a mixture of methanol and one of nine different buffers (60:40, v/v). wspH values were measured after mixing methanol with an appropriate buffer. The mean retention time of each compound was plotted against wspH of each mobile phase. The inflection point of each sigmoidal curve represented wspK a of the compound. Using wspK a in already known equations for the specific methanol/buffer mixture, wwpK a values were calculated. Obtained pKa values for synthesized compounds were in a narrow range from 3.34-3.81 and pKa for ibuprofen was 4.45. Predicted pKa values for these compounds in SPARC software showed good correlation with experimental pKa values (R2=0.8048).",
publisher = "Univerzitet u Kragujevcu - Prirodno-matematički fakultet, Kragujevac",
journal = "Kragujevac Journal of Science",
title = "Determination of ionization constants (PKA) of β-hydroxy-β-arylalkanoic acids using high-pressure liquid chromatography",
number = "40",
pages = "103-111",
doi = "10.5937/KgJSci1840103S"
}

Savić, J., Marković, B., Vitnik, V.,& Dilber, S.. (2018). Determination of ionization constants (PKA) of β-hydroxy-β-arylalkanoic acids using high-pressure liquid chromatography. in Kragujevac Journal of Science
Univerzitet u Kragujevcu - Prirodno-matematički fakultet, Kragujevac.(40), 103-111.
https://doi.org/10.5937/KgJSci1840103S

Savić J, Marković B, Vitnik V, Dilber S. Determination of ionization constants (PKA) of β-hydroxy-β-arylalkanoic acids using high-pressure liquid chromatography. in Kragujevac Journal of Science. 2018;(40):103-111.
doi:10.5937/KgJSci1840103S .

Savić, Jelena, Marković, Bojan, Vitnik, Vesna, Dilber, Sanda, "Determination of ionization constants (PKA) of β-hydroxy-β-arylalkanoic acids using high-pressure liquid chromatography" in Kragujevac Journal of Science, no. 40 (2018):103-111,
https://doi.org/10.5937/KgJSci1840103S . .

TY  - JOUR
AU  - Vitnik, Vesna
AU  - Milenković, Marina
AU  - Dilber, Sanda
AU  - Vitnik, Željko J.
AU  - Juranić, Ivan O.
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1832
AB  - A series of α,β-unsaturated and α-bromo carboxylic acids were identified as potent antimicrobial agents. The antimicrobial activity was evaluated using the broth microdilution method. All acids 1-12 exhibited a significant activity against nine laboratory control strains of bacteria and two strains of yeast Candida albicans. The tested acids were efficiently prepared by optimized phase-transfer-catalyzed (PTC) reactions of ketones with bromoform and aqueous lithium hydroxide in alcoholic solvent with triethylbenzyl ammonium chloride (TEBA) as catalyst.
AB  - U ovom radu je prikazano in vitro ispitivanje antimikrobnog dejstva serije α,β-nezasićenih i α-bromkarboksilnih kiselina i pokazano je da su one potencijalno dobri antimikrobni agensi. Sve kiseline 1-12 pokazale su značajnu aktivnost prema devet sojeva bakterija i dva soja gljivica Candida albicans. Ispitivane kiseline sintetisane su u optimizovanoj reakciji ketona sa bromoformom i litijum-hidroksidom u smesi rastvarača (terc-butanol/voda). Kao katalizator za prenos između faza upotrebljen je trietilbenzilamonijum-hlorid (TEBA).
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Improved synthesis and in vitro study of antimicrobial activity of α,β-unsaturated and α-bromo carboxylic acids
T1  - Optimizacija sinteze i in vitro proučavanje antimikrobnog dejstva α,β-nezasićenih i α-bromkarboksilnih kiselina
VL  - 77
IS  - 6
SP  - 741
EP  - 750
DO  - 10.2298/JSC111104016V
ER  - 

@article{
author = "Vitnik, Vesna and Milenković, Marina and Dilber, Sanda and Vitnik, Željko J. and Juranić, Ivan O.",
year = "2012",
abstract = "A series of α,β-unsaturated and α-bromo carboxylic acids were identified as potent antimicrobial agents. The antimicrobial activity was evaluated using the broth microdilution method. All acids 1-12 exhibited a significant activity against nine laboratory control strains of bacteria and two strains of yeast Candida albicans. The tested acids were efficiently prepared by optimized phase-transfer-catalyzed (PTC) reactions of ketones with bromoform and aqueous lithium hydroxide in alcoholic solvent with triethylbenzyl ammonium chloride (TEBA) as catalyst., U ovom radu je prikazano in vitro ispitivanje antimikrobnog dejstva serije α,β-nezasićenih i α-bromkarboksilnih kiselina i pokazano je da su one potencijalno dobri antimikrobni agensi. Sve kiseline 1-12 pokazale su značajnu aktivnost prema devet sojeva bakterija i dva soja gljivica Candida albicans. Ispitivane kiseline sintetisane su u optimizovanoj reakciji ketona sa bromoformom i litijum-hidroksidom u smesi rastvarača (terc-butanol/voda). Kao katalizator za prenos između faza upotrebljen je trietilbenzilamonijum-hlorid (TEBA).",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Improved synthesis and in vitro study of antimicrobial activity of α,β-unsaturated and α-bromo carboxylic acids, Optimizacija sinteze i in vitro proučavanje antimikrobnog dejstva α,β-nezasićenih i α-bromkarboksilnih kiselina",
volume = "77",
number = "6",
pages = "741-750",
doi = "10.2298/JSC111104016V"
}

Vitnik, V., Milenković, M., Dilber, S., Vitnik, Ž. J.,& Juranić, I. O.. (2012). Improved synthesis and in vitro study of antimicrobial activity of α,β-unsaturated and α-bromo carboxylic acids. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 77(6), 741-750.
https://doi.org/10.2298/JSC111104016V

Vitnik V, Milenković M, Dilber S, Vitnik ŽJ, Juranić IO. Improved synthesis and in vitro study of antimicrobial activity of α,β-unsaturated and α-bromo carboxylic acids. in Journal of the Serbian Chemical Society. 2012;77(6):741-750.
doi:10.2298/JSC111104016V .

Vitnik, Vesna, Milenković, Marina, Dilber, Sanda, Vitnik, Željko J., Juranić, Ivan O., "Improved synthesis and in vitro study of antimicrobial activity of α,β-unsaturated and α-bromo carboxylic acids" in Journal of the Serbian Chemical Society, 77, no. 6 (2012):741-750,
https://doi.org/10.2298/JSC111104016V . .