A number of quinolone derivatives have been reported to possess anti-mycobacterial activity. Generally. Mycobacterium tuberculosis isolates expressing resistance to both isoniazid and rifampin are susceptible to fluoroquinolones. Benzotriazole is a hetero-bicyclic aromatic ring endowed with interesting chemical and biological properties and pharmacological activities. In a preliminary study we have recently reported the activity of triazolo[4,5-h]quinolone-carboxylic acids, a new class of benzotriazole derivatives active against multi-drug resistant M. tuberculosis (MDR-Mtb). In this study we confirm that this novel class of quinolones is endowed with a selective anti-mycobacterial activity, coupled with absence of cytotoxicity.The SAR analysis of the new derivatives in comparison with the previous series shows that the methyl group is the most effective substituent in both N-3 and N-9 positions of the ring system. (C) 2010 Elsevier Masson SAS. All rights reserved.
4-Aminobenzotriazole (ABTA) as a Removable Directing Group for Palladium-Catalyzed Aerobic Oxidative C–H Olefination
作者:Zhuo Wang、Xiaohan Ye、Meina Jin、Qi Tang、Shengyu Fan、Zhiguang Song、Xiaodong Shi
DOI:10.1021/acs.orglett.2c00285
日期:2022.5.6
4-Aminobenzotriazole (ABTA) was applied as an effective removabledirectinggroup (DG) in Pd-catalyzed C–H activation for the first time. Compared with the widely applied pyridine and quinoline analogs, ABTA showed significantly improved reactivity, achieving aerobic oxidative C–H olefination in excellent yields (up to 95% vs <50% with other reported DGs under identical conditions). Using this new
Facile alkylation of 4-nitrobenzotriazole and its platelet aggregation inhibitory activity
作者:Dhandeep Singh、Om Silakari
DOI:10.1016/j.bmc.2017.07.045
日期:2017.10
oxygen atom and aromatic ring. Benzyl derivatives [compound 20; 1-Benzyl-4-nitro-1H-benzotriazole; IC50 = 0.81 ± 0.08 mM, compound 21; 2-Benzyl-4-nitro-2H-benzotriazole; IC50 = 0.82 ± 0.19 mM] and sulfonyl derivative [compound 23; 1-[(4-Methylphenyl)sulfonyl]-4-nitro-1H-benzotriazole; IC50 = 0.82 ± 0.19 mM] are also found to be highly active. Furthermore, all compounds possess P2Y12 binding affinity as
我们探索了在碱性条件下4-硝基苯并三唑的简便烷基化作用,并与标准药物替卡格雷(选择性P2Y12抑制剂)进行了比较,测试了合成衍生物的潜在ADP诱导的血小板凝集抑制活性。4-位硝基在烷基化反应中(在强碱性条件下)高度活化,导致形成降解产物(如3-硝基苯-1,2-二胺),这使烷基产物的分离非常困难。我们在温和的碱性条件(碳酸钾和DMF)下优化了反应,该条件下没有任何降解产物。这也许是第一个报道的4-硝基苯并三唑衍生物具有血小板凝集抑制活性。通常,活性随着烷基链长度的增加而增加,并且发现1-烷基位置异构体比2-烷基异构体更有效。已发现苯甲酰基衍生物是最有效的[化合物22; (4-硝基-1H-苯并三唑-1-基)(苯基)甲酮; IC 50 = 0.65±0.10 mM],这可能归因于负电性氧原子和芳环。苄基衍生物[化合物20; 1-苄基-4-硝基-1 H-苯并三唑; IC 50 = 0.81±0