A versatile and green mechanochemical route for aldehyde–oxime conversions
作者:Christer B. Aakeröy、Abhijeet S. Sinha、Kanishka N. Epa、Christine L. Spartz、John Desper
DOI:10.1039/c2cc36315a
日期:——
A robust, facile and solvent-free mechanochemical path for aldehyde-oxime transformations using hydroxylamine and NaOH is explored; the method is suitable for aromatic and aliphatic aldehydes decorated with a range of substituents.
Ruthenium-Catalyzed Rearrangement of Aldoximes to Primary Amides in Water
作者:Rocío García-Álvarez、Alba E. Díaz-Álvarez、Javier Borge、Pascale Crochet、Victorio Cadierno
DOI:10.1021/om3006917
日期:2012.9.10
The rearrangement of aldoximes to primaryamides has been studied using the readily available arene-ruthenium(II) complex [RuCl2(η6-C6Me6)P(NMe2)3}] (5 mol %) as catalyst. Reactions proceeded cleanly in pure water at 100 °C without the assistance of any cocatalyst, affording the desired amides in high yields (70–90%) after short reaction times (1–7 h). The process was operative with both aromatic
One-Pot Copper(I)-Catalyzed Synthesis of 3,5-Disubstituted Isoxazoles
作者:Trond V. Hansen、Peng Wu、Valery V. Fokin
DOI:10.1021/jo050163b
日期:2005.9.1
3,5-Disubstituted isoxazoles are obtained in good yields by a convenient one-pot, three-step procedure utilizing a regioselective copper(I)-catalyzed cycloaddition reaction between in situ generated nitrile oxides and terminal acetylenes. Most functional groups do not interfere with the reaction, which can be performed in aqueous solvents without protection from oxygen. Since all reagents are used
In this work, the preparation of the first rutheniumcomplexes containing a phosphino-oxime ligand is presented. Thus, the reaction of cis-[RuCl2(DMSO)4] (3) with 2.4 equivalents of 2-Ph2PC6H4CHNOH (1) in refluxing THF led to the clean formation of the octahedral ruthenium(II) derivative cis,cis,trans-[RuCl2κ2-(P,N)-2-Ph2PC6H4CHNOH}2] (5), whose structure was unambiguously confirmed by means of a
在这项工作中,提出了含有膦-肟配体的第一种钌配合物的制备方法。因此,顺式-[RuCl 2(DMSO)4 ](3)与2.4当量的2-Ph 2 PC 6 H 4 CH NOH(1)在回流THF中的反应导致八面体钌(II)的干净形成。衍生物的顺式,顺式,反式-将[RuCl 2 κ 2 - (P,ñ)-2-PH 2 PC 6 H ^ 4 CHNOH} 2 ](5),其结构通过单晶X射线衍射研究得到明确证实。复杂5也可以由二聚[的RuCl(μ-Cl)的(η的反应合成的6 -对异丙基苯甲烷)} 2 ](4)与过量的1在回流的甲苯中。的治疗4与2个当量的1,在CH 2氯2在室温,也允许的半夹心的Ru(制备II)衍生物将[RuCl κ 2 - (P,Ñ)-2-PH 2 PC 6 ħ4 CHNOH}(η 6 -对异丙基苯甲烷)] [PF 6 ]( 6)。另外,络合物5和6被证明是醛糖肟重排成伯酰胺以及
Discovery, Synthesis, and Biological Evaluation of a Novel Group of Selective Inhibitors of Filoviral Entry
作者:Maria V. Yermolina、Jizhen Wang、Michael Caffrey、Lijun L. Rong、Duncan J. Wardrop
DOI:10.1021/jm1008715
日期:2011.2.10
Herein, we report the development of an antifiloviral screening system, based on a pseudotyping strategy, and its application in the discovery of a novel group of small molecules that selectivelyinhibit the Ebola and Marburg glycoprotein (GP)-mediated infection of human cells. Using Ebola Zaire GP-pseudotyped HIV particles bearing a luciferase reporter gene and 293T cells, a library of 237 small molecules
在此,我们报告了基于假型策略的抗丝病毒筛选系统的开发,及其在发现一组新的小分子中的应用,这些小分子选择性地抑制了埃博拉病毒和马尔堡糖蛋白 (GP) 介导的人类细胞感染。使用带有荧光素酶报告基因和 293T 细胞的 Ebola Zaire GP 假型 HIV 颗粒,筛选了 237 个小分子库以抑制 GP 介导的病毒进入。从该测定中,先导化合物8a被鉴定为丝状病毒进入的选择性抑制剂,IC 5030 μM。为了分析功效的官能团要求,然后使用“点击”化学制备的 56 种异恶唑和三唑衍生物对这种 3,5-二取代异恶唑进行结构-活性关系分析。该研究表明,虽然异恶唑环可以被三唑系统取代,但在8a 中发现的 5-(二乙氨基)乙酰胺取代基是抑制病毒细胞进入所必需的。3-芳基取代基的变化提供了许多更有效的抗病毒剂,IC 50值范围为2.5 μM。还发现先导化合物8a及其三种衍生物可阻断马尔堡糖蛋白 (GP) 介导的人类细胞感染。