Synthesis and studies of the antifungal activity of 2-anilino-/2,3-dianilino-/2-phenoxy- and 2,3-diphenoxy-1,4-naphthoquinones
作者:Elisa Leyva、Lluvia I. López、Ramón F. García de la Cruz、Claudia G. Espinosa-González
DOI:10.1007/s11164-016-2732-3
日期:2017.3
Several synthetic and natural naphthoquinone derivatives have been associated with antifungal activity. Candida albicans is a fungus that is known to exist in the normal human flora, but under certain conditions it can cause mild to fatal infections. Its pathogenicity has been associated with fungus conversion from cellular yeast to filamentous form Y – M . Inhibition of this process by several anilino-
几种合成的和天然的萘醌衍生物与抗真菌活性有关。 白色念珠菌 是一种已知存在于正常人类菌群中的真菌,但在某些条件下会引起轻度至致命的感染。其致病性与真菌从细胞酵母转化为丝状 Y – M有关 。为了发现结构,氧化还原性质和生物活性之间的相关性,研究了几种苯胺基,二苯胺基,苯氧基和二苯氧基-1,4-萘醌对这一过程的抑制作用。
Water-promoted unprecedented chemoselective nucleophilic substitution reactions of 1,4-quinones with oxygen nucleophiles in aqueous micelles
作者:Vishnu K. Tandon、Hardesh K. Maurya
DOI:10.1016/j.tetlet.2010.05.071
日期:2010.7
Unique nucleophilic substitution and addition reactions of nitrogen and sulfur nucleophiles with 1,4-quinones in aqueous suspension with amines and thiols have recently been demonstrated by us.2 However, the reactivity of oxygen nucleophiles toward nucleophilic substitution compared to nitrogen and sulfur nucleophiles ‘on water’ is not facile. An unprecedented economical, green methodology approach
Neue 2-Halogen-3-phenoxy-1,4-naphthochinon-Derivate der Formel (I),
in welcher
R¹-R⁵ und X die in der Beschreibung angegebene Bedeutung haben, ihre Verwendung zur Bekämpfung von Schädlingen und neue Zwischenprodukte.
Die neuen Verbindungen der Formel (I) können nach Analogieverfahren hergestellt werden, z.B. indem man geeignete Phenole mit 2,3-Dihalogennaphthochinonen umsetzt oder geeignete 2-Phenoxy-1,4-naphthochinone halogeniert. Die 2-Phenoxy-1,4-naphthochinone sind auch neu und durch die Formel (IV) dargestellt und können auch nach Analogieverfahren hergestellt werden, z.B. aus geeigneten Phenolen und 2-Halogen-1,4-naphthochinon.
Micelles catalyzed chemoselective synthesis ‘in water’ and biological evaluation of oxygen containing hetero-1,4-naphthoquinones as potential antifungal agents
作者:Vishnu K. Tandon、Hardesh K. Maurya、Nripendra N. Mishra、Praveen K. Shukla
DOI:10.1016/j.bmcl.2011.08.095
日期:2011.11
Various oxygen containing 1,4-naphthoquinone derivatives have been synthesized chemoselectively by an economical, viable green methodology approach using water as solvent with or without surfactants such as Triton X-100, SDS, LD (laundry detergent), and TBAB, a phase transfer catalyst and evaluated for their in vitro antifungal and antibacterial activity. The antifungal profile of 3, 4a, 4b, and 6 indicated that compounds 3a, 3b, 4b, 6a, and 6c have potent antifungal activity compared to clinically prevalent antifungal drugs Fluconazole and Amphotericin-B against Sporothrix schenckii, Trichophyton mentagraphytes, and Candida parapsilosis and compound 3b has been found to be a lead antifungal agent for further study. (C) 2011 Elsevier Ltd. All rights reserved.
Cesium Carbonate-Mediated Reaction of Dichloronaphthoquinone Derivatives with O-Nucleophiles
作者:Do-Min Lee、Ju Hong Ko、Kee-In Lee
DOI:10.1007/s00706-007-0679-1
日期:2007.8
A cesium carbonate-mediated reaction of 2,3-dichloronaphthoquinone, 6,7-dichloro-5,8-quinolinedione, and -isoquinolinedione with oxygen nucleophiles has been described.