An environmentally-friendly one-pot synthesis of 4-sulfonyl benzoic acids
作者:Bryan A. Frieman
DOI:10.1016/j.tetlet.2014.02.092
日期:2014.5
This Letter reports an environmentally-friendly one-pot SNAr reaction of thiols to 4-halobenzoic acid methyl esters to provide 4-substituted sulfone benzoic acids and picolinicacids after bleach-mediated oxidative workup. These acid intermediates were synthesized on gram scale, are perfect partners for library synthesis, and have good physical chemical properties useful for drug discovery.
这封信报道了一种环境友好的一锅硫醇与4-卤代苯甲酸甲酯发生的S N Ar反应,在漂白剂介导的氧化后处理后提供了4-取代的砜苯甲酸和吡啶甲酸。这些酸中间体以克为单位合成,是文库合成的理想伴侣,并具有可用于药物发现的良好物理化学性质。
Design, Multigram Synthesis, and in Vitro and in Vivo Evaluation of Propylamycin: A Semisynthetic 4,5-Deoxystreptamine Class Aminoglycoside for the Treatment of Drug-Resistant Enterobacteriaceae and Other Gram-Negative Pathogens
作者:Takahiko Matsushita、Girish C. Sati、Nuwan Kondasinghe、Michael G. Pirrone、Takayuki Kato、Prabuddha Waduge、Harshitha Santhosh Kumar、Adrian Cortes Sanchon、Malgorzata Dobosz-Bartoszek、Dimitri Shcherbakov、Mario Juhas、Sven N. Hobbie、Thomas Schrepfer、Christine S. Chow、Yury S. Polikanov、Jochen Schacht、Andrea Vasella、Erik C. Böttger、David Crich
DOI:10.1021/jacs.9b01693
日期:2019.3.27
Enterobacteriaceae (CREs), present a major and growing threat to human health and society, providing an urgent need for the development of improved potent antibiotics for their treatment. We describe the design and development of a new class of aminoglycosideantibiotics culminating in the discovery of propylamycin. Propylamycin is a 4'-deoxy-4'-alkyl paromomycin whose alkyl substituent conveys excellent activity
由多重耐药病原体引起的传染病,特别是耐碳青霉烯肠杆菌科 (CRE),对人类健康和社会构成重大且日益严重的威胁,迫切需要开发改进的有效抗生素来治疗。我们描述了一类新的氨基糖苷类抗生素的设计和开发,最终发现了丙霉素。Propylamycin 是一种 4'-脱氧-4'-烷基巴龙霉素,其烷基取代基对广谱 ESKAPE 病原体和其他革兰氏阴性菌感染(包括 CRE)具有出色的活性,在存在许多常见耐药性决定因素的情况下,无论是氨基糖苷类修饰酶或 rRNA 甲基转移酶。重要的,已证明丙霉素对 ArmA 抗性决定簇的作用不敏感,该决定簇的存在严重损害了 plazomicin 和所有其他 4,6-二取代 2-脱氧链霉胺氨基糖苷类的作用。ArmA 通常与碳青霉烯酶基因编码在同一质粒上,因此对 ArmA 缺乏敏感性,这确保了丙霉素在与碳青霉烯类药物联合使用时不会出现交叉耐药性问题。无细胞翻译测定、定量核糖体足迹和
Synthesis and Mass Spectral Studies of Some (<i>E</i>)- and (<i>Z</i>)-1-Alkylthio - and 1-Alkylsulphonyl-2-<i>P</i>-Tolylsulphonylstilbenes
synthesized compounds were examined. Smiles-type rearrangement observed in (E)-and (Z)- sulphide-sulphones (3a–i and 5a–i) was absent in (E)- and (Z)-disulphones (4a–i and 6a–i). Loss of sulphur dioxide and sulphonyl-sulphinate rearrangement with vinyl migration was noticed in all the synthesized compounds. McLafferty-type rearrangement was observed only in (E)- sulphide-sulphones and (E)- disulphones