Studies on Log Po/w of Quinoxaline di-N-Oxides: A Comparison of RP-HPLC Experimental and Predictive Approaches
作者:Elsa Moreno、Elisabetta Gabano、Enrique Torres、James A. Platts、Mauro Ravera、Ignacio Aldana、Antonio Monge、Silvia Pérez-Silanes
DOI:10.3390/molecules16097893
日期:——
As reported in our previous papers, a series of quinoxaline-2-carboxamide 1,4-di-N-oxide derivatives were synthesized and studied as anti-tuberculosis agents. Here, the capability of the shake-flask method was studied and the retention time (expressed as log K) of 20 compounds were determined by RP-HPLC analysis. We found that the prediction of log P by the RP-HPLC analysis can result in a high accuracy and can replace the shake-flask method avoiding the experimental problems presented by quinoxaline di-N-oxides. The studied compounds were subjected to the ALOGPS module with the aim of comparing experimental log Po/w values and predicted data. Moreover, a preliminary in silico screening of the QSAR relationship was made confirming the influence of reduction peak potential, lipophilicity, H-bond donor capacity and molecular dimension descriptors on anti-tuberculosis activity.
根据我们之前的论文,合成了一系列喹喔啉-2-羧酰胺1,4-二-N-氧化物衍生物,并研究其作为抗结核药物的潜力。在这里,我们研究了摇瓶法的能力,并通过反相高效液相色谱(RP-HPLC)分析确定了20种化合物的保留时间(以log K表示)。我们发现,RP-HPLC分析对log P的预测可以达到较高的准确性,可以替代摇瓶法,避免了喹喔啉二-N-氧化物所带来的实验问题。研究的化合物被提交至ALOGPS模块,以比较实验得到的log Po/w值和预测数据。此外,我们还进行了QSAR关系的初步体外筛选,确认了还原峰电位、脂溶性、氢键供体能力和分子尺寸描述符对抗结核活性的影响。