The oxidation of several fluoroanilines with potassiumferricyanide and potassium hydroxide is described. In this oxidation, the major products are fluoroazobenzenes. In the case of 2-fluoro-substituted anilines, heterocyclic fluorophenazines were obtained in low to moderate yields. The optimal conditions for the reaction and the mechanism are presented.Key words: oxidation, fluoroanilines, fluoroazobenzenes
The oxidation of several fluoroanilines to fluoroazobenzenes with potassiumferricyanide and KOH in a solvent mixture of is described.
描述了在铁溶剂中用铁氰化钾和KOH将几种氟苯胺氧化为氟偶氮苯。
Mechanochemical oxidation of fluorinated anilines to symmetric azobenzenes
作者:Ivan Andreosso、Antonio Papagni、Luca Vaghi
DOI:10.1016/j.jfluchem.2018.10.012
日期:2018.12
A solventless mechanochemical methodology for the oxidation of electron-poor fluorinated anilines to the corresponding symmetrical azo compounds has been developed. In this process phenyliodine(III)diacetate and inexpensive calcium hypochlorite demonstrate to be good oxidants, providing the desired fluorinated azobenzenes in satisfactory yields, within short reaction times and avoiding the use of environmental
Fast relaxing red and near-IR switchable azobenzenes with chalcogen and halogen substituents: periodic trends, tuneable thermal half-lives and chalcogen bonding
作者:Aidan Kerckhoffs、Kirsten E. Christensen、Matthew J. Langton
DOI:10.1039/d2sc04601f
日期:——
Molecular photoswitches operating in the red to near-IR region with controllable thermal relaxation rates are attractive components for photo-regulating biological processes. Herein, we report the synthesis of red-shifted azobenzenes functionalised with the heavier chalcogens and halogens that meet these requirements for biologicalapplication; namely fatigue-resistant photo-switching with red and
在红色至近红外区域工作且具有可控热弛豫率的分子光电开关对于光调节生物过程来说是有吸引力的组件。在此,我们报道了用较重的硫属元素和卤素官能化的红移偶氮苯的合成,满足生物应用的这些要求;即带有红光和近红外光的抗疲劳光开关以及用于进一步功能化应用的功能手柄。我们报告了硫族元素和卤素偶氮苯系列的强劲周期性趋势,并利用分子内硫族键合来调整和红移吸收最大值,并得到光物理测量和固态结构分析的支持。值得注意的是,通过明智地选择硫属元素和卤素取代基,可以在 10 7 s 的时间尺度上调节Z → E热异构化的速率。
Modular Synthetic Routes to Fluorine-Containing Halogenated Phenazine and Acridine Agents That Induce Rapid Iron Starvation in Methicillin-Resistant <i>Staphylococcus aureus</i> Biofilms
作者:Ke Liu、Massimiliano Brivio、Tao Xiao、Verrill M. Norwood、Young S. Kim、Shouguang Jin、Antonio Papagni、Luca Vaghi、Robert W. Huigens
DOI:10.1021/acsinfecdis.1c00402
日期:2022.2.11
routes to fluorine-containing halogenatedphenazine (HP) and halogenated acridine (HA) agents with potent antibacterial and biofilm-killing activities. Nine fluorinated phenazines were rapidly accessed through a synthetic strategy involving (1) oxidation of fluorinated anilines to azobenzene intermediates, (2) SNAr with 2-methoxyaniline, and (3) cyclization to phenazines upon treatment with trifluoroacetic
在感染期间,细菌会使用一系列耐药机制来抵消抗生素治疗。此外,致病菌形成表面附着的生物膜,这些生物膜带有丰富的代谢休眠持久性细胞群。细菌对抗生素的侵害产生耐药性;然而,非复制性生物膜天生就对所有种类的抗生素具有耐受性。因此,能够根除抗生素耐药和抗生素耐受细菌的分子非常重要。在这里,我们报告了含氟卤化吩嗪 (HP) 和卤化吖啶 (HA) 试剂的模块化合成路线,具有有效的抗菌和生物膜杀灭活性。通过合成策略快速获得九种氟化吩嗪,包括 (1) 将氟化苯胺氧化为偶氮苯中间体,(2) SN Ar 与 2-甲氧基苯胺,和 (3) 在用三氟乙酸处理后环化成吩嗪。使用 S N Ar 和 Buchwald-Hartwig 方法合成了五个结构相关的吖啶杂环。从这个集中的集合中,吩嗪5g、5h、5i和吖啶9c显示出对革兰氏阳性病原体的有效抗菌活性(MIC = 0.04–0.78 μM)。此外,5g和9c根除金黄色葡