Nano CuO–Ag‐catalyzed synthesis of some novel pyrano[2,3‐d] pyrimidine derivatives and evaluation of their bioactivity
作者:Sreelakshmi Poola、Mahammad S. Shaik、Murali Sudileti、Subbarao Yakkate、Vedasree Nalluri、Apparao Chippada、Suresh R. Cirandur
DOI:10.1002/jccs.201900256
日期:2020.5
coli, against Gram‐positive bacteria such as Bacillus subtilis and Staphylococcus aureus, and antifungal activity against Candida albicans and Candida glabrata was also evaluated. The compounds showed higher bacterial activity than the standard used. Compounds 5b, 5d, 5g, 5h, and 5i exhibited higher free radical scavenging activity than the standard butylated hydroxy toluene (BHT). Compounds 5b, 5d
开发了一种简单,高效且绿色的方法,在纳米CuO-Ag作为催化剂的情况下,通过Knoevenagel和Michael加成合成吡喃并[2,3-d]嘧啶衍生物。合成的目标化合物5a–l的结构已通过光谱和元素分析得到了确认,并通过2,2-二苯基-1-picrylhydrazyl(DPPH),H 2 O 2和NO方法筛选了其抗氧化活性。它们对革兰氏阴性菌铜绿假单胞菌和大肠杆菌,枯草芽孢杆菌和金黄色葡萄球菌等革兰氏阳性菌具有抗菌活性,对白色念珠菌具有抗真菌活性。并且还评价了光滑念珠菌。该化合物显示出比所用标准更高的细菌活性。化合物5b,5d,5g,5h和5i表现出比标准丁基化羟基甲苯(BHT)更高的自由基清除活性。与标准四环素相比,化合物5b,5d和5h对革兰氏阳性细菌具有更高的活性,化合物5b,5d,5h和5i对革兰氏阴性细菌具有更高的活性。化合物5b,5j,并且5l对球形假丝酵母和白色念珠菌的抗真菌活性比标准灰黄霉素更高。