Novel 6,8-dibromo-4(3H)quinazolinone derivatives of anti-bacterial and anti-fungal activities
作者:Mosaad S. Mohamed、Mohsen M. Kamel、Emad M.M. Kassem、Nageh Abotaleb、Sherein I. Abd El-moez、Marwa F. Ahmed
DOI:10.1016/j.ejmech.2010.04.014
日期:2010.8
Starting from 4-(6,8-dibromo-2-phenyl-4-oxo-(4H)-quinazolin-3-yl)-benzoic acid ethyl ester (II) and its acid hydrazide III, a new series of Schiff bases IV and their cyclized products, thiazolidinones V, oxadiazole VIII, pyrazoles X–XII, pyrroles XIII–XV and other related products were synthesized. These compounds were screened for their anti-bacterial activity against Gram-positive bacteria (Staphylococcus
从4-(6,8-二溴-2-苯基-4-氧代-(4 H)-喹唑啉-3-基)-苯甲酸乙酯(II)及其酰肼III开始,一系列新的席夫碱合成了IV及其环化产物噻唑烷酮V,恶二唑VIII,吡唑X – XII,吡咯XIII – XV和其他相关产品。筛选了这些化合物对革兰氏阳性菌(金黄色葡萄球菌,单核细胞增生军团菌和蜡状芽孢杆菌)和革兰氏阴性菌的抗菌活性。大肠杆菌,铜绿假单胞菌和鼠伤寒沙门氏菌)和抗真菌活性(白色念珠菌和黄曲霉)均采用纸片扩散技术。还通过琼脂条纹稀释法确定化合物的最小抑制浓度(MIC)。在合成的化合物中,发现2-(4-(2-苯基-6,8-二溴-4-氧代-(4 H)喹唑啉-3-基)-N-乙基酰胺基苯甲酸酰肼VIIa最有效。 MIC分别为1.56、3.125、1.56、25、25和25μg/ ml的抗大肠杆菌,鼠伤寒沙门氏菌,单核细胞增生李斯特菌,金黄色葡萄球菌,铜绿假单胞菌和蜡状芽孢杆菌。发现化合物2-(4-(2-苯基-6