کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
202388 | 460599 | 2011 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Modelling of pH dependent n-octanol/water partition coefficients of ionizable pharmaceuticals Modelling of pH dependent n-octanol/water partition coefficients of ionizable pharmaceuticals](/preview/png/202388.png)
The lipophilicity of a compound is generally described by its n-octanol/water partition coefficient. Lipophilicity is an important descriptor, e.g. to correlate the toxic effect of substances or adsorption and transport properties of drug molecules in the human body.Often drug molecules contain one or more ionizable groups, hence the lipophilicity is strongly pH-dependent.The thermodynamic model COSMO-RS is a widely accepted method to predict partition coefficients of neutral compounds between neutral solvents and ionic liquids, thus COSMO-RS is principally able to handle molecules containing ionizable groups. In this work the model COSMO-RS was used to predict lipophilicity profiles of ionizable pharmaceuticals containing one acidic group. Under consideration of ion paring the partition of ionizable drugs can be calculated. The predicted pH dependent lipophilicities are in good agreement with literature data and own measurements.
► Predicted lipophilicity profiles of ionizable pharmaceuticals with COSMO-RS.
► Predicted ion pair partition coefficients.
► Significant influence of salt on distribution of dissociated acids in octanol/water.
► Experimental verification of the salt influence on octanol/water partition coefficients of dissociated compounds.
Journal: Fluid Phase Equilibria - Volume 305, Issue 2, 25 June 2011, Pages 197–203