Compounds 34 and 36 showed antitumor activity at GI50 (MG-MID) concentrations of 11.2, and 24.2 μM, respectively. Molecular modeling study including flexible alignment; electrostatic, hydrophobic mappings; and pharmacophore prediction were performed. A main featured pharmacophore model was developed which justifies the importance of the main pharmacophoric groups as well as of their relative distances.
设计,合成和评估了一系列新的2,6-取代的
喹唑啉-4-酮,并对其体外DHFR抑制,抗菌和抗肿瘤活性进行了评估。化合物22,33-37,39-43,和45被证明是活性DHFR
抑制剂与IC 50范围0.4-1.0微米。化合物18显示出与已知抗生素
庆大霉素相当的广谱抗菌活性。化合物34和36在GI 50时显示抗肿瘤活性(MG-MID)浓度分别为11.2和24.2μM。分子建模研究,包括灵活的比对;静电,疏
水图谱;和药效团预测进行。开发了一个主要的药效基团模型,该模型证明了主要药效基团及其相对距离的重要性。关于
喹唑啉核的π系统的取代模式和空间考虑被证明对
生物活性至关重要。