Synthesis and antibacterial activity of a novel series of DNA gyrase inhibitors: 5-[(E)-2-arylvinyl]pyrazoles
摘要:
The 2-arylvinyl moiety in 1-(3-chlorophenyl)-3-(4-piperidyl)-5-[(E)-2-(5-chloro-1H-indol-3-yl)vinyl]pyrazole 2, which has previously shown improved DNA gyrase inhibition and target-related antibacterial activity, was transformed to other groups and the in vitro antibacterial activity of the synthesized compounds was evaluated. Many of the 5-[(E)-2-arylvinyl]pyrazoles synthesized in this study exhibited potent antibacterial activity against quinolone-resistant clinical isolates of Gram-positive bacteria with minimal inhibitory concentration values equivalent to those against susceptible strains. (c) 2005 Elsevier Ltd. All rights reserved.
PPh<sub>3</sub>⋅HBr-DMSO Mediated Expedient Synthesis of γ-Substituted β,γ-Unsaturated α-Ketomethylthioesters and α-Bromo Enals: Application to the Synthesis of 2-Methylsulfanyl-3(<i>2 H</i>)-furanones
作者:Kanchan Mal、Abhinandan Sharma、Prakas R. Maulik、Indrajit Das
DOI:10.1002/chem.201303755
日期:2014.1.13
An efficient chemoselective general procedure for the synthesis of γ‐substituted β,γ‐unsaturatedα‐ketomethylthioesters from α,β‐unsaturatedketones has been achieved through an unprecedented PPh3⋅HBr‐DMSO mediated oxidative bromination and Kornblum oxidation sequence. The newly developed reagent system serves admirably for the synthesis of α‐bromoenals from enals. Furthermore, AuCl3‐catalyzed efficient
Unsaturated oxime ethers and their use as fungicides
申请人:Dow AgroSciences LLC
公开号:US06303818B1
公开(公告)日:2001-10-16
The present invention relates to certain oxime ether compounds, compositions containing these compounds, and methods for controlling fungi by the use of a fungitoxic amount of the compounds or compositions.
Chromatography-Free Wittig Reactions Using a Bifunctional Polymeric Reagent
作者:Peter Shu-Wai Leung、Yan Teng、Patrick H. Toy
DOI:10.1021/ol1021614
日期:2010.11.5
The first example of a polystyrene bearing two distinct reagent groups has been prepared. This phosphine and amine functionalized material was used in one-pot Wittig reactions with an aldehyde and either an α-halo-ester, -ketone, or -amide. Due to the heterogeneous nature of the polymer, the desired alkene product of these reactions could be isolated in excellent yield in essentially pure form after
Dehydrozingerone Inspired Discovery of Potential Broad-Spectrum Fungicidal Agents as Ergosterol Biosynthesis Inhibitors
作者:Xiangmin Song、Xinyue Zhu、Ting Li、Cai Liang、Meng Zhang、Yu Shao、Jun Tao、Ranfeng Sun
DOI:10.1021/acs.jafc.9b04231
日期:2019.10.16
were synthesized, and their fungicidal activities and action mechanism against Colletotrichum musae were evaluated. The bioassay result showed that most compounds exhibited excellent fungicidal activity in vitro at 50 μg mL–1. Compounds 13, 16, 18, 19, and 27 exhibited broad-spectrum fungicidal activity; especially, compounds 19 and 27 were found to have more potent fungicidal activity than azoxystrobin