Synthesis of 1,3,4-oxadiazolium and 1,3,4-oxadiazolo[3,2-a]pyridinium salts
作者:G. V. Boyd、S. R. Dando
DOI:10.1039/j39700001397
日期:——
is described. Numerous 3-aryl-1,3,4-oxadiazolium salts, containing a novel type of heterocyclic cation, have been prepared by the action of carboxylic anhydrides on diacylarylhydrazines in the presence of perchloric or fluoroboric acid. 1,3,4-Oxadiazolo[3,2-a]pyridinium salts are similarly formed from 1 -acylamino-2-pyridones. The stability of the salts and their i.r. and n.m.r. spectra are discussed
已经研究了一些简单的1,3,4-恶二唑的质子化和烷基化,并描述了一种新的1,3,4-恶二唑的合成。在高氯酸或氟硼酸的存在下,通过羧酸酐对二酰基芳基肼的作用,已经制备了许多含有新型杂环阳离子的3-芳基-1,3,4-恶二唑鎓盐。类似地由1-酰基氨基-2-吡啶酮形成1,3,4-氧杂二唑[3,2- a ]吡啶鎓盐。讨论了盐的稳定性及其ir和nmr光谱。
Synthesis of 2-Imino-1,3,4-thiadiazoles from Hydrazides and Isothiocyanates via Sequential Oxidation and P(NMe<sub>2</sub>)<sub>3</sub>-Mediated Annulation Reactions
N-acyldiazenes with isothiocyanates, producing 2-imino-1,3,4-thiadiazoles, is reported. This reaction proceeds well with crude N-acyldiazenes derived from the oxidation of hydrazides by iodine and permits the sequential synthesis of products directly from hydrazides without purification of the less stable N-acyldiazene intermediates. The reaction does not require transition metals and is a simple, scalable operation
[EN] HYDRAZIDE DERIVATIVES AND THEIR SPECIFIC USE AS ANTIBACTERIAL AGENTS BY CONTROLLING ACINETOBACTER BAUMANNII BACTERIUM<br/>[FR] DÉRIVÉS D'HYDRAZIDE ET LEUR UTILISATION SPÉCIFIQUE EN TANT QU'AGENTS ANTIBACTÉRIENS POUR LUTTER CONTRE UNE BACTÉRIE ACINETOBACTER BAUMANNII
申请人:YNCREA HAUTS DE FRANCE
公开号:WO2020169682A1
公开(公告)日:2020-08-27
The present invention relates to compounds of the following general formula (I): or a pharmaceutically acceptable salt and/or solvate thereof, their use as a drug, in particular as antibacterial agent, notablyforpreventingand/or treating disorders associated to Acinetobacter baumannii. The present invention also relates to pharmaceutical compositions containing said compoundsand the process for preparing said compounds.
KETOKEN GEM-DITHIOLS AND TRITHIONES: SYNTHESIS AND STUDY OF THE BEHAVIOR TOWARDS DIPOLE REAGENTS; SYNTHESIS OF SOME NITROGEN HETEROAROMATICS
作者:Salem E. Zayed
DOI:10.1080/10426509608029632
日期:1996.1.1
Abstract The behavior of ketoken gem-dithiols towards active methylene and methyl groups resulted in the formation of thiopyrano-dihydrocaumarine derivatives IIIa, b via cyclocondensation reaction between substituted 4-dihydrocyclohexanone Ia, b. N-phenylpyrazoline derivative VI was also formed through reaction of gem-dithiol IV with malonic acid followed by phenyl hydrazine. Pyridopyridazine derivative
摘要 酮基二硫醇对活性亚甲基和甲基的行为导致通过取代的 4-二氢环己酮 Ia、b 之间的环缩合反应形成噻吩并二氢黄豆素衍生物 IIIa、b。N-苯基吡唑啉衍生物VI也通过偕二硫醇IV与丙二酸和苯肼反应形成。还可以合成吡啶并哒嗪衍生物XII。还研究了 XV 中硫酮基团对某些偶极系统的行为,以得到螺产物 XVIII-XX。
[3 + 2]-Cycloaddition of <i>in Situ</i> Generated Nitrile Imines and Acetylene for Assembling of 1,3-Disubstituted Pyrazoles with Quantitative Deuterium Labeling
作者:Vladimir V. Voronin、Maria S. Ledovskaya、Evgeniy G. Gordeev、Konstantin S. Rodygin、Valentine P. Ananikov
DOI:10.1021/acs.joc.8b00155
日期:2018.4.6
methodology for the preparation of 1,3-disubstituted pyrazoles from in situ generated nitrile imines and acetylene is reported. The reactions are performed in a simple two-chamber reactor. One part of the reactor is loaded with hydrazonoyl chloride precursors of active nitrile imine species and a base. The other part is used to generate acetylenefrom CaC2 and water. Partitioning of the reactants improves