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Dopamine: Acid‐base Properties And Membrane Penetration Capacity
Published 2018 · Chemistry, Medicine
HIGHLIGHTSThe complete set of protonation constants determined for dopamine.1H NMR method and auxiliary compounds used to determine microscopic constants.Protonation species populations reflect physico‐chemical behavior of catecholamines. ABSTRACT Dopamine and 4 related compounds were studied by 1H NMR‐pH titrations and a case‐tailored evaluation method. The resulting acid‐base properties of dopamine are quantified in terms of 3 macroscopic and 12 microscopic protonation constants and the concomitant 3 interactivity parameters. The species‐ and site‐specific basicities are interpreted by means of inductive and shielding effects through various intra‐ and intermolecular comparisons. The site‐specific basicities determined this way are key parameters for the prediction of pharmacokinetic behavior and receptor‐binding at the molecular level.