2-((3,5-Dinitrobenzyl)thio)quinazolinones: Potent Antimycobacterial Agents Activated by Deazaflavin (F<sub>420</sub>)-Dependent Nitroreductase (Ddn)
作者:Yanlin Jian、He Eun Forbes、Fabian Hulpia、Martijn D. P. Risseeuw、Guy Caljon、Hélène Munier-Lehmann、Helena I. M. Boshoff、Serge Van Calenbergh
DOI:10.1021/acs.jmedchem.0c01374
日期:2021.1.14
substituents in positions 2 and 4 of the previously synthesized but yet undisclosed 5-cyano-4-(methylthio)-2-arylpyrimidin-6-ones 4, ring closure, and further optimization led to the identification of the potent antitubercular 2-thio-substituted quinazolinone 26. Structure–activityrelationship (SAR) studies indicated a crucial role for both meta-nitro substituents for antitubercularactivity, while the introduction
related to 3-alkylamino-4H-pyrido[4,3-e]-1,2,4-thiadiazine 1,1-dioxides were synthesized and tested as putative K(ATP) channelopeners on isolated pancreatic endocrine tissue as well as on isolated vascular, intestinal, and uterine smooth muscle. Most of the 6-halogeno-2-alkylaminoquinazolin-4(3H)-ones were found to inhibitinsulinreleasefrompancreaticB-cells and to exhibit vasorelaxant properties
合成和测试了一系列与3-烷基氨基-4H-吡啶并[4,3-e] -1,2,4-噻二嗪1,1-二氧化物相关的一系列6-取代的2-烷基氨基喹唑啉-4(3H)-。作为孤立的胰腺内分泌组织以及孤立的血管,肠和子宫平滑肌上假定的K(ATP)通道开放剂。发现大多数6-卤代-2-烷基氨基喹唑啉-4(3H)-1抑制胰岛素从胰腺B细胞释放,并表现出血管舒张作用。与之前描述的它们在内分泌上比在平滑肌组织上更具活性的吡啶并二氮杂二嗪类异构体相反,喹唑啉酮不能被视为组织选择性化合物。生物调查,包括对(86)Rb的测量,(45)用6-氯-和6-碘-3-异丙基氨基喹唑啉进行了胰岛细胞的钙外流以及在存在或不存在格列本脲的情况下测量暴露于30或80 mM KCl的大鼠主动脉环中血管扩张剂的效能-4(3H)-一个 这样的实验表明,取决于组织,这些新化合物并不总是表达纯K(ATP)通道开放剂的药理作用。通过X射线晶体学分析,喹
Quinazolines and Related Heterocyclic Compounds, and Their Therapeutic Use
申请人:Smits Rogier Adriaan
公开号:US20100016293A1
公开(公告)日:2010-01-21
Compounds that interact with the histamine H4 receptor, and which may be useful for treating or preventing disorders and conditions mediated by the histamine H4 receptor, e.g. inflammation, are of formula (I) wherein Q is CR
1
or N; X is CR
2
or N, provided that Q and X are not both N; Y is CR
3
or N; Z is CH or N; R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are independently H, F, Cl, Br, I, or a hydrocarbon group which optionally contains one or more heteroatoms; and R7 is a heterocyclic radical including one or more N atoms; or a pharmaceutically acceptable salt, ester or solvate thereof.
Mehrcyclische Azine mit Heteroatomen in 1- und 3-Stellung, 25. Mitt.: 2-Amino-4-oxo-4H-3,1-benzothiazine: Darstellung,Dimroth-Umlagerung zu 4-Oxo-2-thioxo-1,2,3,4-tetrahydrochinazolinen und MS/MS-Fragmentierung
2‐Amino‐4‐oxo‐4H‐3,1‐benzothiazinen 4a–c. Entgegen Literaturangaben geben 1 oder 2 unter anderen Reaktionsbedingungen durch Cyclokondensation die 2‐Benzoylamino‐4‐oxo‐4H‐3,1‐benzothiazine 6a–c. Dimroth‐Umlagerung von 4 führt zu den 2‐Thioxochinazolinen 5. Die ms Fragmentierungvon 4, 5 und 6 wird diskutiert.
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