作者:Neil V. Harris、Christopher Smith、Keith Bowden
DOI:10.1021/jm00163a067
日期:1990.1
observed qualitative structure-activity relationships is proposed. The inhibitory activities of the compounds against the growth of intact bacterial cells in vitro closely parallel those for the inhibition of the isolated bacterial enzymes, suggesting that their antifolate action is responsible for their antibacterial effects. Five of the compounds were tested for their ability to cure a systemic E
合成了一系列5-取代的2,4-二氨基喹唑啉(3),并从细菌和哺乳动物来源评估了它们作为二氢叶酸还原酶(DHFR)的抑制剂。最好的化合物(例如53种)对大肠杆菌DHFR表现出良好的活性,但对细菌的选择性没有比哺乳动物酶高的选择性。抑制酶的构效关系似乎很复杂,不宜进行简单分析。提出了一个假设来解释观察到的定性结构-活性关系。该化合物对体外完整细菌细胞生长的抑制活性与抑制分离的细菌酶的抑制活性非常相似,这表明它们的抗叶酸作用是其抗菌作用的原因。