Synthesis, biological activity and POM/DFT/docking analyses of annulated pyrano[2,3-d]pyrimidine derivatives: Identification of antibacterial and antitumor pharmacophore sites
作者:Ajmal R. Bhat、Rajendra S. Dongre、Faisal A. Almalki、Malika Berredjem、Mohamed Aissaoui、Rachid Touzani、Taibi Ben Hadda、Mohammad S. Akhter
DOI:10.1016/j.bioorg.2020.104480
日期:2021.1
on its antimicrobial activity against some Gram-positive and Gram-negative bacteria such as Pseudomonas aureus, E. coli, Staphylococcus aureus, Klebsiella pneumonia and Bacillus cereus. All the pyrano[2,3-d]pyrimidines were characterized by spectroscopic analyses. Antibacterial screening revealed that the presence of heteroaryl, cyano and amino groups on pyrano[2,3-d]pyrimidine skeleton increases its
合成了新的环状吡喃并[2,3-d]嘧啶衍生物,其骨架上带有羟基、甲氧基、溴、腈和硝基取代基。注意到取代基对抗菌活性大小的相关电子效应。吡喃并[2,3-d]嘧啶骨架中苯环上的给电子取代基(即:4-OH、4-OCH 3、4-Br)和吸电子取代基(4-NO 2)对其产生不同的影响。对一些革兰氏阳性和革兰氏阴性细菌如金黄色葡萄球菌、大肠杆菌、金黄色葡萄球菌、肺炎克雷伯菌和蜡状芽孢杆菌的抗菌活性。所有吡喃并[2,3-d]嘧啶均通过光谱分析表征。抗菌筛选表明,吡喃并[2,3-d]嘧啶骨架上杂芳基、氰基和氨基的存在增加了其对细菌细胞壁的渗透能力,从而使产物变得更具生物活性。因此在药物设计中应考虑吸电子或供电子体的性质对取代基的影响。 -CRN 水解为酰胺恢复了重要的分子内相互作用,如邻硝基苯基和 -ONO δ- ...-NH δ+/酰胺链接,为抗菌-NH、H2O-药团位点提供了关键模板,最终提高了先天抗菌谱。由于武装环状吡喃并