不对称 N,N'-二取代硫脲 (1a-d) 在与 Br2/AcOH、氯乙酸乙酯、草酸二乙酯、丙二酸二乙酯和水合肼的闭环反应中的杂环化导致直接形成含硫的各种杂环系统(2-8) 其中噻吩醇化是针对芳基的。标准现代光谱技术(IR、1 H NMR、13 C NMR、质谱和微量分析)很好地支持了合成工作和反应性研究。
不对称 N,N'-二取代硫脲 (1a-d) 在与 Br2/AcOH、氯乙酸乙酯、草酸二乙酯、丙二酸二乙酯和水合肼的闭环反应中的杂环化导致直接形成含硫的各种杂环系统(2-8) 其中噻吩醇化是针对芳基的。标准现代光谱技术(IR、1 H NMR、13 C NMR、质谱和微量分析)很好地支持了合成工作和反应性研究。
Enhancement of Different Biomedical Activities of Newly Synthesized Quinazoline Derivatives
作者:Ibrahim F. Zeid、Emad M. Kassem、Neama A. Mohamed、Ahmed A. Salman、Al Shimaa G. Shalaby
DOI:10.1002/jhet.3147
日期:2018.6
albicans). The presently investigated compounds were synthesized in higher yields, and the structure features were elucidated on the basis of IR, 1H‐NMR, and mass and elemental analysis data. These compounds were also evaluated as antioxidant agent. The results revealed that six compounds (2a, 11b, 11a, 2b, 13a, and 3c) exhibited higher antimicrobial activity against the tested pathogenic strains. In addition
Nanomagnetically modified polyphosphoric acid (NiFe2O4@SiO2–PPA): an efficient, fast, and reusable catalyst for the synthesis of 2-thioxoquinazolinones under solvent-free conditions
Polyphosphoric acid functionalized silica-coated magnetic nanoparticles with core–shell structure (NiFe2O4@SiO2–PPA) has been used as a magnetically recyclable green catalyst for the one-pot three-component synthesis of 2-thioxoquinazolinones by the reaction of isatoic anhydride, primary amines and thiourea under neat conditions. The catalyst is readily recovered by simple magnetic decantation and can be recycled five times with no significant loss of catalytic activity.
An Efficient One-Pot Multicomponent Synthesis of 2,3-Dihydro-3-alkyl/aryl-2-thioxoquinazolin-4(1H)-ones under Solvent-Free Conditions
作者:Okram Singh、Nepram Devi、Sarangthem Singh
DOI:10.1055/s-0032-1316698
日期:2012.9
A series of 2,3-dihydro-3-alkyl/aryl-2-thioxoquinazolin-4(1H)-one is prepared by one-pot multicomponent reaction of anthranilic acid, S,S-dimethyl trithiocarbonate and aliphatic/aromatic amine undersolvent-freeconditions.
One-pot, Simple, and Convenient Synthesis of 2-Thioxo-2,3-dihydroquinazolin-4(1H)-ones
作者:Vinod K. Tiwari、Desh D. Singh、Hakkim A. Hussain、Bhuwan B. Mishra、Archana Singh
DOI:10.1007/s00706-007-0747-6
日期:2008.1
A simple and convenientmethod for the synthesis of diverse 2-thioxo-2,3-dihydroquinazolin-4(1 H )-ones was developed as one-pot reaction of anthranilic acidesters, primary amines, and bis(benzotriazolyl)methanethione in presence of the amidine base DBU .
作为一种邻氨基苯甲酸酯,伯胺和双(苯并三唑基)甲烷硫酮的一锅反应,开发了一种简单方便的合成各种2-thioxo-2,3-dihydroquinazolin-4(1 H )-ones的方法。的base基 DBU 。
Antibacterial activity evaluation of pleuromutilin derivatives with 4(3H)-quinazolinone scaffold against methicillin-resistant Staphylococcus aureus
作者:Yu Deng、Yang Zhang、Xiao-Hu Chen、Cheng-Hong Li
DOI:10.1016/j.ejmech.2022.114960
日期:2023.1
Pleuromutilin, a naturally occurring product with moderate antibacterialactivity, has a unique structure that has attracted great efforts to modify its scaffold to obtain lead compounds. Herein, we report the synthesis of a series of novel pleuromutilin derivatives with a scaffold of 4(3H)-quinazolinone or its analogues at the C-14 side chain and investigated their in vitroactivity against Staphylococcus aureus
日益增长的抗生素耐药性正在引发医疗保健危机,导致迫切需要新的抗生素来应对严重的医院和社区感染。截短侧耳素是一种具有中等抗菌活性的天然产物,其独特的结构引起了人们对对其支架进行修饰以获得先导化合物的巨大努力。在此,我们报道了一系列在C-14侧链上具有4( 3H )-喹唑啉酮或其类似物支架的新型截短侧耳素衍生物的合成,并研究了它们对金黄色葡萄球菌、表皮葡萄球菌以及革兰氏阴性菌的体外活性。 -阴性细菌(大肠杆菌和沙门氏菌肠亚种。肠白痢)。构效关系(SAR)研究表明,4( 3H )-喹唑啉酮苯环上的取代基对于提高抗菌活性的作用不如取代位置重要,而4(3H)-喹唑啉酮N-3位上的取代基对提高抗菌活性的作用并不重要。 H )-喹唑啉酮对疗效有很大影响。用其他环(吡啶、吡咯、噻吩或环戊基)取代4(3 H )-喹唑啉酮的苯部分也显示出很高的抗菌功效,这意味着苯环对于发挥强大的抗菌性能来说是可有可无的。体外