What is the difference between clogP and logP?
What is the difference between clogP and logP?
clogP: Everyone is aware that logP is the logarithm of partition coefficient of a compound between n-octanol and water. For comparison purpose, say if clogP of compounds X and Y are 2 and 4 respectively that means compound X is more hydrophilic than compound Y.
How are logP results related to solubility?
A negative value for logP means the compound has a higher affinity for the aqueous phase (it is more hydrophilic); when logP = 0 the compound is equally partitioned between the lipid and aqueous phases; a positive value for logP denotes a higher concentration in the lipid phase (i.e., the compound is more lipophilic).
What is logP in medicinal chemistry?
LogP is a component of Lipinski’s Rule of 5 a rule of thumb to predict solubility and permeability that has become a surrogate for drug-likeness. The most commonly used measure of lipophilicity is LogP, this is the partition coefficient of a molecule between an aqueous and lipophilic phases, usually octanol and water.
What is logP a measure of?
LogP (partition coefficient) is a measure of the lipophilicity of a compound. Lipophilicity is a key determinant of the pharmacokinetic behaviour of drugs.
How is cLogP determined?
cLogP Calculation The logP value of a compound, which is the logarithm of its partition coefficient between n-octanol and water log(coctanol/cwater), is a well established measure of the compound’s hydrophilicity. Low hydrophilicities and therefore high logP values cause poor absorption or permeation.
How is LipE calculated?
The ligand-lipophilicity efficiency (LLE), or lipophilic efficiency (LipE), assesses the binding energy of a compound relative to the compound’s lipophilicity as: LipE = pIC50 − LogP (Leeson & Springthorpe, 2007).
Is LogP the same as pH?
Log D is a distribution coefficient widely used to measure the lipophilicity of ionizable compounds, where the partition is a function of the pH. For non-ionizable compounds Log P = Log D throughout pH range, whereas for ionizable compounds Log D takes into account the partition of both ionized and non-ionized forms.
How does pH affect partition coefficient?
The partition coefficient of benzoic acid in benzene-water system was found to be 0.636 and in buffer solutions of pH 4.0, pH 7.0 and pH 9.0 were 0.841, 0.624 and 0.589 respectively. Graphically it was observed that partition coefficient of benzoic acid in acidic pH was higher than neutral and basic medium.
Are lipophilic drugs more potent?
Generally, the higher the lipophilicity of a drug, the stronger its binding to protein and the greater its distribution.
How is the cLogP value of a compound calculated?
cLogP Calculation. The logP value of a compound, which is the logarithm of its partition coefficient between n-octanol and water log(c octanol/c water), is a well established measure of the compound’s hydrophilicity.
Which is more hydrophilic LogP or log Pmean?
A negative value for log Pmeans the compound has a higher affinity for the aqueous phase (it is more hydrophilic); when logP= 0 the compound is equally partitioned between the lipid and aqueous phases; a positive value for logPdenotes a higher concentration in the lipid phase (i.e., the compound is more lipophilic).
When to use LogP or LogD for lipophilicity?
understand the differences between them and apply them accordingly. LogD is the appropriate descriptor for lipophilicity of ionizable compounds because it accounts for the pH dependence of a molecule in aqueous solution. LogP describes lipophilicity for neutral compounds only, and while it can
Which is the correct definition of logp and logD?
Definition of LogP and LogD The partition coefficient, P, is a measure of the differential solubility of a compound in two immiscible solvents. The most commonly used solvent system is octan-1-ol/water. The partition coefficient is the descriptor of lipophilicity for neutral compounds, or where the compound exists in a single form. LogP = log 10