Coupling of N-Nosylhydrazones with Nitrosoarenes: Transition-Metal-Free Approach to (Z)-N-Arylnitrones
作者:Tingting Liu、Zhaohong Liu、Zhenhua Liu、Donghua Hu、Yeming Wang
DOI:10.1055/s-0036-1591757
日期:2018.4
Abstract An efficient and transition-metal-free protocol for the synthesis of (Z)-N-arylnitrones from the direct coupling of N-nosylhydrazones with nitrosoarenes under mild conditions is described. The protocol is compatible with a wide range of functional groups placed on both the reagents and provided the corresponding nitrones in good to excellentyields by simple recrystallization process. The
[DE] NEUE CYCLOALKYL-HALTIGE 5-ACYLINDOLINONE, DEREN HERSTELLUNG UND DEREN VERWENDUNG ALS ARZNEIMITTEL<br/>[EN] NOVEL CYCLOALKYL-CONTAINING 5-ACYLINDOLINONES, THEIR PREPARATION AND THEIR USE AS PHARMACEUTICAL PRODUCTS<br/>[FR] NOUVELLES 5-ACYLINDOLINONES A TENEUR EN CYCLOALKYLE, LEUR PREPARATION ET LEUR UTILISATION COMME PRODUITS PHARMACEUTIQUES
申请人:BOEHRINGER INGELHEIM INT
公开号:WO2005087761A1
公开(公告)日:2005-09-22
Die vorliegende Erfindung betrifft cycloalkyl-haltige 5-Acylindolinone der allgemeinen Formel in der R1 bis R3 wie in den Ansprüchen 1 bis 6 definiert sind, deren Tautomere, deren Enantiomere, deren Diastereomere , deren Gemische und deren Salze, welche wertvolle pharmakologische Eigenschaften aufweisen, insbesondere eine Hemmwirkung auf Proteinkinasen, insbesondere eine Hemmwirkung auf die Aktivität der Gkykogen-Synthase-kinase (GSK-3).
Switchable Catalysis with a Light-Responsive Cavitand
作者:Orion B. Berryman、Aaron C. Sather、Agustí Lledó、Julius Rebek
DOI:10.1002/anie.201105374
日期:2011.9.26
Catalytic guest stars: A cavitand with an azobenzene wall adopts an introverted shape when irradiated with UV light. This conformation has been characterized in solution and the solid state and is used to control guest binding. By incorporating an organocatalyst guest, the rate of the Knoevenagel condensation is controlled with light.
A Lewis Acid Catalyzed Annulation to 2,1-Benzisoxazoles
作者:Kate D. Otley、Jonathan A. Ellman
DOI:10.1021/jo5015432
日期:2014.9.5
We report here a new, atom economical annulation to 2,1-benzisoxazole scaffolds via the BF3·Et2O-catalyzed reaction of glyoxylate esters and nitrosoarenes. The developed method represents a convergent route to this compound class from previously unexplored inputs and provides a range of 2,1-benzisoxazoles in moderate to high yields under convenient conditions. Along with exploration of substrate scope
我们在这里报告了一种新的、通过乙醛酸酯和亚硝基芳烃的 BF 3 ·Et 2 O 催化反应形成 2,1-苯并异恶唑支架的原子经济环化。所开发的方法代表了从以前未探索的输入中合成此类化合物的收敛途径,并在方便的条件下以中等到高产率提供了一系列 2,1-苯并异恶唑。除了底物范围的探索之外,通过18 O 标记和反应中间体的合成进行的初步机理研究为乙醛酸盐以高 O 选择性向亚硝基苯进行不寻常的翻转加成,随后进行新型弗里德尔-克来福特环化提供了证据。
Reactions of Arynes with Nitrosoarenes-An Approach to Substituted Carbazoles
transition metals are necessary in the reaction of in situ generated arynes with nitrosoarenes to give substitutedcarbazoles. Depending on the fluoride source and the solvent, either N‐arylated carbazoles or NH‐carbazoles are obtained (see scheme; DME=dimethoxyethane, OTf=trifluoromethanesulfonate). In these cascades a CC and one or two CN bonds are formed. The reactions are easy to conduct and proceed