Determination of lipophilicity of alpha-(4-phenylpiperazine) derivatives of N-benzylamides using chromatographic and computational methods.
This paper describes the evaluation of lipophilicity of alpha-(4-phenylpiperazine) derivatives of N-benzylamides. We employed reversed-phase thin-layer chromatography (RP-TLC) and reversed-phase high performance liquid chromatography (RP-HPLC) as experimental methods, using mixtures of acetonitrile and water as the mobile phases with addition of 0.1%TFA in the HPLC experiments. Retention parameters (R(M)) and capacity factors (log k) determined by applying these methods were linearly dependent on the acetonitrile concentration and enabled us to estimate the relative lipophilicity factors: R(M0) and log k(0). These factors were compared with the calculated partition coefficients C log P obtained using several software packages. The results indicate that both experimental methods (RP-TLC and RP-HPLC) yielded similar results, and these methods enable determining the lipophilicity of alpha-(4-phenylpiperazine) derivatives of N-benzylamides. Significant correlations were found between log P values calculated by Pallas, ALOGPS and C log P Chem3D programs and the experimental data.
Department of Physicochemical Drug Analysis, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9 St, 30-688 Kraków, Poland.
Marek
M
Bajda
Adam
A
Bucki
Jakub
J
Szlek
Marta
M
Szwaczkiewicz
Maciej
M
Swierczek
Barbara
B
Malawska
D001593:Benzyl Compounds / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002855:Chromatography, Thin Layer / Q000379:methods*; D015394:Molecular Structure; D010879:Piperazines / Q000032:analysis* / Q000737:chemistry; D012984:Software
D001593:Benzyl Compounds; D010879:Piperazines; C031503:phenylpiperazine