197846-82-5Relevant articles and documents
Transition Metal-Free Synthesis of meta-Bromo- and meta-Trifluoromethylanilines from Cyclopentanones by a Cascade Reaction
Bunch, Lennart,Cetin, Adnan,Staudt, Markus
supporting information, (2022/02/10)
Anilines are key constituents in biologically active compounds and often obtained from transition metal-catalyzed coupling of an aryl halide with an amine. In this work, we report a transition metal-free method for the synthesis of meta-bromo- and meta-trifluoromethylanilines starting from 3-tribromomethylcyclopentanone or 3-(2-bromo-2-chloro-1,1,1-trifluoroethyl)cyclopentanone, respectively. The scope of the transformation is shown by application of primary, secondary and aromatic amines. The reaction proceeds in acceptable to high yields (20–81 %), and allows for the synthesis of anilines with substitution patterns otherwise difficult to access.
Amination of Aryl Halides Mediated by Electrogenerated Nickel from Sacrificial Anode
Daili, Farah,Sengmany, Stéphane,Léonel, Eric
, p. 2462 - 2469 (2021/06/28)
Electrochemical C(sp2)?N couplings mediated by nickel salts generated from the sacrificial anode has been described for the first time. In this approach, the sacrificial nickel anode is employed as the sole source of nickel and the process, operationally simple to set up, enables the preparation of functionalized arylamine derivatives with moderate to good yields, under mild reaction conditions and without additional ligand. A cooperative process between the two electrodes is involved in the proposed mechanism.
Catalyst-free photodecarbonylation ofortho-amino benzaldehyde
Li, Lamei,Wang, Songping,Wei, Wentao,Yan, Ming,Zhou, Jingwei
supporting information, p. 3421 - 3426 (2020/06/25)
It is almost a consensus that decarbonylation of the aldehyde group (-CHO) needs to not only be mediated by transition metal catalysts, but also requires severe reaction conditions (high temperature and long reaction time). In this work, inspired by the “conformational-selectivity-based” design strategy, we broke this consensus and discovered a catalyst-free photodecarbonylation of the aldehyde group. It revealed that decarbonylation can be easily achieved with visible light irradiation by introducing a tertiary amine into theortho-position of the aldehyde group. A diverse array of tertiary amines is tolerated by our photodecarbonylation under mild conditions. Furthermore, the (QM) computations of the mechanism and the experiments on well-designed special substrates revealed that our photodecarbonylation depends on the conformational specificity of the aldehyde group and tertiary amine, and occurs through an unusual [1,4]-H shift and a subsequent [1,3]-H shift.
Photo-induced dealdehyding method
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Paragraph 0048-0053; 0090-0095, (2020/06/16)
The invention provides a photo-induced dealdehyding method, and belongs to the technical field of organic synthesis. The photo-induced dealdehyding method comprises the following steps that a mixtureof a compound shown in the formula I and a solvent are reacted under an inert gas atmosphere and visible light irradiation, a dealdehyding product is obtained, and no photocatalyst is used in the whole process; wherein the structural formula of the formula I shown in the specification, R is a functional group and is selected from hydrogen, methyl, methoxyl, cyano, chlorine, bromine or fluorine. According to the photo-induced dealdehyding method, in the inert gas atmosphere, the compound shown in the formula (I) can be excited to generate carbon-oxygen bond homogeneous cracking through visiblelight irradiation, then free radical migration and double bond displacement are conducted, finally carbon monoxide is removed, aldehyde group removal is completed, no photocatalyst is needed in the whole process, operation is easy and convenient, and conditions are mild.
Bicyclic alkaloid compound, preparation method and applications thereof
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Paragraph 0183; 0186, (2018/11/03)
The present invention relates to a bicyclic alkaloid compound, or a tautomer, a stereoisomer, a racemate, the non-equal mixture of enantiomers, a geometric isomer, a solvate, a pharmaceutically acceptable salt or a prodrug thereof, and a pharmaceutical composition containing the compound. The invention further discloses uses of the compounds and the pharmaceutical composition thereof as drugs, especially as anti-inflammatory drugs and anti-fibrotic drugs.
Protozoan Parasite Growth Inhibitors Discovered by Cross-Screening Yield Potent Scaffolds for Lead Discovery
Devine, William,Woodring, Jennifer L.,Swaminathan, Uma,Amata, Emanuele,Patel, Gautam,Erath, Jessey,Roncal, Norma E.,Lee, Patricia J.,Leed, Susan E.,Rodriguez, Ana,Mensa-Wilmot, Kojo,Sciotti, Richard J.,Pollastri, Michael P.
supporting information, p. 5522 - 5537 (2015/08/03)
Tropical protozoal infections are a significant cause of morbidity and mortality worldwide; four in particular (human African trypanosomiasis (HAT), Chagas disease, cutaneous leishmaniasis, and malaria) have an estimated combined burden of over 87 million disability-adjusted life years. New drugs are needed for each of these diseases. Building on the previous identification of NEU-617 (1) as a potent and nontoxic inhibitor of proliferation for the HAT pathogen (Trypanosoma brucei), we have now tested this class of analogs against other protozoal species: T. cruzi (Chagas disease), Leishmania major (cutaneous leishmaniasis), and Plasmodium falciparum (malaria). Based on hits identified in this screening campaign, we describe the preparation of several replacements for the quinazoline scaffold and report these inhibitors' biological activities against these parasites. In doing this, we have identified several potent proliferation inhibitors for each pathogen, such as 4-((3-chloro-4-((3-fluorobenzyl)oxy)phenyl)amino)-6-(4-((4-methyl-1,4-diazepan-1-yl)sulfonyl)phenyl)quinoline-3-carbonitrile (NEU-924, 83) for T. cruzi and N-(3-chloro-4-((3-fluorobenzyl)oxy)phenyl)-7-(4-((4-methyl-1,4-diazepan-1-yl)sulfonyl)phenyl)cinnolin-4-amine (NEU-1017, 68) for L. major and P. falciparum.
Palladium-catalyzed monoamination of dihalogenated benzenes
Larsen, Simon Birks?,Bang-Andersen, Benny,Johansen, Tommy N?rskov,J?rgensen, Morten
, p. 2938 - 2950 (2008/09/19)
The palladium-catalyzed monoamination of symmetric dibromobenzenes can be performed using a catalyst based on Pd2dba3 and BINAP in the presence of NaO(t-Bu). The analogous transformation of non-symmetric bromoiodobenzenes is most effectively performed with Xantphos as the ligand, while reactions with BINAP were non-selective. These transformations can be scaled uneventfully to >10 g quantities. They do not require drybox or Schlenk techniques, and all reagents are weighed out in air. The resulting monobromoanilines are versatile intermediates for further synthetic transformations.
Novel carbamate and oxamide compounds
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, (2008/06/13)
Disclosed are novel aromatic compounds of the formula(I) described herein, wherein G, E, W, Ar, X, Y and Z are disclosed herein. The compounds are useful for treating cytokine mediated diseases or conditions such as chronic inflammatory diseases. Also disclosed are pharmaceutical compositions containing and processes of making such compounds.