Knowledge of the lipophilicity of candidate compounds for prodrugs may predict their predetermined
course/effect in the body. Acyclovir (ACV) belongs to a class of drugs with low bioavailability. Its tricyclic analogues, the
derivatives of 3,9-dihydro-3-[(2-hydroxyethoxy)methyl]-9-oxo-5H-imidazo[1,2-a]purine (TACV) exhibit similar antiviral
activities and are more lipophilic as compared with acyclovir itself. In the search for new antiviral prodrugs 6-(4-
methoxyphenyl) tricyclic compound (6-(4-MeOPh)-TACV) was modified by esterification of a hydroxyl group in the
aliphatic chain. Selected esters (acetyl, isobutyryl, pivaloyl, ethoxycarbonyl and nicotinoyl) were synthesized and their
lipophilicity was determined by the HPLC-RP method. The study compared the log kw calculated from the linear and
quadratic equations and proved the correctness of the application of the linear relationship log k as a function of the
concentration of ACN in the mobile phase (30-60%). Statistical analyses of the comparative values of log kw and clogP
were carried out using computational methods. It was proved that the AC logP algorithm can be useful for the analysis of
these compounds, which can have a statistically justified application in the assessment of the quantitative structure–
activity relationship (QSAR). The lipophilicity determined by the HPLC method appears as follows: 6-(4-MeOPh)-TACV
< Ac- < Nic- < Etc- < iBut- < Piv- (log kw = 0.65-2.26). Finally, the HPLC-RP method was developed and validated for
simultaneous determination of synthesized esters.
了解候选原药化合物的亲脂性可以预测它们在体内的预定疗程/效果。
阿昔洛韦(ACV)属于
生物利用度较低的一类药物。其
三环类似物、3,9-二氢-3-[(2-羟基乙氧基)甲基]-9-氧代-5H-
咪唑并[1,2-a]
嘌呤(TACV)的衍
生物具有类似的抗病毒活性,而且与
阿昔洛韦本身相比更具亲脂性。为了寻找新的抗病毒原药,6-(4-
甲氧基苯基)
三环化合物(6-(4-MeOPh)-TACV)通过脂肪链中的羟基进行酯化改性。合成了一些酯(乙酰基、异丁酰基、
新戊酰基、乙氧基羰基和烟酰基),并通过 HPLC-RP 方法测定了它们的亲脂性。研究比较了线性方程和二次方程计算出的 log kw,证明了应用 log k 作为流动相中 ACN 浓度(30%-60%)函数的线性关系的正确性。使用计算方法对 log kw 和 clogP 的比较值进行了统计分析。结果证明,AC logP 算法可用于分析这些化合物,在定量结构-活性关系(Q
SAR)评估中具有统计学上的合理应用。用高效
液相色谱法测定的亲脂性如下:6-(4-MeOPh)-TACV < Ac- < Nic- < Etc- < iBut- < Piv- (log kw = 0.65-2.26)。最后,建立并验证了同时测定合成酯的 HPLC-RP 方法。