Determination of 1-aryl-4-propylpiperazine pKa values: The substituent on aryl modulates basicity
作者:Enza Lacivita、Marcello Leopoldo、Paola De Giorgio、Francesco Berardi、Roberto Perrone
DOI:10.1016/j.bmc.2008.12.015
日期:2009.2
know its pKa because the protonation state of the molecule will be critical for ligand–receptor interaction and for the pharmacokinetic of the molecule. pKa values of a series of 1-(substitutedphenyl)-4-propylpiperazines were measured to study how the presence of a substituent on the phenyl ring modulates the basicity of N-4 nitrogen. pKa values indicated that the position of the substituent was crucial
为了设计一种潜在的药物,重要的是要知道它的p K a,因为分子的质子化状态对于配体-受体相互作用和分子的药代动力学至关重要。测量一系列1-(取代的苯基)-4-丙基哌嗪的p K a值,以研究苯环上取代基的存在如何调节N-4氮的碱性。p K a值表明取代基的位置至关重要。通常,在邻位引入取代基苯环的-位增加了分子的碱性。该作用似乎与空间和构象作用有关,与取代基的电子性质无关。另一方面,间位和对位取代的衍生物显示出p K a的轻微降低,其在质量上与取代基的电子性质一致。