519-66-4Relevant academic research and scientific papers
Design, synthesis and antitubercular potency of 4-hydroxyquinolin-2(1H)-ones
de Macedo, Maíra Bidart,Kimmel, Roman,Urankar, Damijana,Gazvoda, Martin,Peixoto, Antonio,Cools, Freya,Torfs, Eveline,Verschaeve, Luc,Lima, Emerson Silva,Ly?ka, Antonín,Mili?evi?, David,Klásek, Antonín,Cos, Paul,Kafka, Stanislav,Ko?mrlj, Janez,Cappoen, Davie
, p. 491 - 500 (2017/07/10)
In this study, a 50-membered library of substituted 4-hydroxyquinolin-2(1H)-ones and two closely related analogues was designed, scored in-silico for drug likeness and subsequently synthesized. Thirteen derivatives, all sharing a common 3-phenyl substituent showed minimal inhibitory concentrations against Mycobacterium tuberculosis H37Ra below 10 μM and against Mycobacterium bovis AN5A below 15 μM but were inactive against faster growing mycobacterial species. None of these selected derivatives showed significant acute toxicity against MRC-5 cells or early signs of genotoxicity in the Vitotox assay at the active concentration range. The structure activity study relation provided some insight in the further favourable substitution pattern at the 4-hydroxyquinolin-2(1H)-one scaffold and finally 6-fluoro-4-hydroxy-3-phenylquinolin-2(1H)-one (38) was selected as the most promising member of the library with a MIC of 3.2 μM and a CC50 against MRC-5 of 67.4 μM.
Stereochemistry of the reduction of α-chloroketones with sodium borohydride—application to 3-chloroquinoline-2,4-diones: Dedicated to the memory of Professor Dr.?Vojeslav ?těrba who died in September 2015 being nearly 93 years old
Klásek, Antonín,Ly?ka, Antonín,K?emen, Filip,Rouchal, Michal
, p. 4490 - 4497 (2016/07/07)
3-Chloroquinoline-2,4-diones were reduced with sodium borohydride to give syn- and anti-chlorohydrins, the stereochemistry of which was established by NMR spectroscopy. Both stereoisomeric chlorohydrins were reacted with potassium carbonate in methanol. a
Oxidative ring opening of 3-hydroxyquinoline-2,4(1H,3H)-diones into N-(α-ketoacyl)anthranilic acids Dedicated to Professor Slovenko Polanc on his 65th birthday
Kafka, Stanislav,Proisl, Karel,Ka?párková, Věra,Urankar, Damijana,Kimmel, Roman,Ko?mrlj, Janez
, p. 10826 - 10835 (2014/01/06)
N-(α-Ketoacyl)anthranilic acids were prepared by oxidative ring opening of 3-hydroxyquinoline-2,4(1H,3H)-diones by using paraperiodic acid (H5IO6) or sodium periodate (NaIO4). The optimisation of the reaction conditions is
Catalyst-controlled divergent C-H functionalization of unsymmetrical 2-aryl cyclic 1,3-dicarbonyl compounds with alkynes and alkenes
Dooley, Johnathon D.,Reddy Chidipudi, Suresh,Lam, Hon Wai
supporting information, p. 10829 - 10836 (2013/08/23)
Achieving site-selective, switchable C-H functionalizations of substrates that contain several different types of reactive C-H bonds is an attractive objective to enable the generation of different products from the same starting materials. Herein, we dem
Reaction of some 2-quinolone derivatives with phosphoryl chloride: Synthesis of novel phosphoric acid esters of 4-hydroxy-2-quinolone
Rudolf, Ondrej,Mrkvicka, Vladimir,Lycka, Antonin,Rouchal, Michal,Klasek, Antonin
, p. E100-E110 (2013/06/04)
3-Chloroquinoline-2,4-diones do not react with phosphoryl chloride, however, 2,4-dichloroquinolines and/or 4-chloroquinolin-2-ones are formed in the presence of N,N-dimethylaniline. Along with these compounds, small quantities of novel dihydrogen phosphates of 4-hydroxyquinolin-2-ones were isolated. We outline a simple procedure that allows for the preparation of these compounds in moderate to good yields. All compounds were characterized by 1H and 13C NMR, IR, EI-MS, and ESI-MS spectroscopy, and in select cases by 31P NMR spectroscopy.
Modified mukaiyama reaction for the synthesis of quinoline alkaloid analogues: Total synthesis of 3,3-diisopentenyl-N-methylquinoline-2,4-dione
Zikou, Lamprini C.,Igglessi-Markopoulou, Olga
experimental part, p. 1861 - 1866 (2009/04/04)
A general synthetic approach, capable of accessing a diverse range of 3,3-disubstituted quinoline-2,4-diones and 1,8-naph-thyridine-2,4-diones via titanium tetrachloride catalyzed C-acylation of silyl ketene acetals is described. The suggested methodological platform is surveyed using different reaction conditions and is applied to the total syntheses of 3,3-diisopentenyl-N-methylquinoline-2,4-dione and 3-demethyl-N-methylatanine.
Synthesis of coumarins, 4-hydroxycoumarins, and 4-hydroxyquinolinones by tellurium-triggered cyclizations
Dittmer, Donald C.,Li, Qun,Avilov, Dimitry V.
, p. 4682 - 4686 (2007/10/03)
Coumarins, 4-hydroxycoumarins, and 4-hydroxyquinolin-2(1H)-ones can be conveniently prepared by treatment of α-halocarboxylic acid esters of salicylaldehyde, o-hydroxyacetophenone, methyl salicylate, and methyl N-methyl- or N-phenylanthranilates with sodium or lithium telluride. Phenylketene formation competes with cyclization of the α-chlorophenylacetate ester of methyl salicylate as demonstrated by a trapping experiment with benzylamine. Elemental tellurium may be recovered and reused.
Novel tandem hydration/cyclodehydration of α-thiocyanatoketones to 2-oxo-3-thiazolines. Application, to thiazolo[5,4-c]quinoline-2}4(3aH,5H)-dione synthesis
Klasek, Antonin,Mrkvicka, Vladimir,Pevec, Andrej,Kosmrlj, Janez
, p. 5646 - 5651 (2007/10/03)
Novel tandem hydration of α-thiocyanatoketones to thiocarbamates followed by in situ cyclodehydration to fused 2-oxo-3-thiazolines is described. The reaction is applied to the synthesis of [1,3]-thiazolo[5,4-c]quinoline-2, 4(3aH,5H)-diones (4). Concentrated sulfuric acid was found to be critical for the reaction as both corresponding 2,3-dioxo-1,2,3,4-tetrahydroquinolin-3-yl thiocyanates (2) and S-(2,4-dioxo-1,2,3,4-tetrahydroquinolin-3-yl) thiocarbamates (3) rapidly hydrolyze in the presence of water to 4-hydroxyquinolin-2(1H)-ones (1).
Electrosynthesis of 3-chloro-1,4-disubstituted-2(1H)-quinolinones and 3,3-dichloro-4-hydroxy-1,4-disubstituted-3,4-dihydro-2(1H)-quinolinones, as well as a new convenient process to dioxindoles
Batanero, Belen,Barba, Fructuoso
, p. 3706 - 3709 (2007/10/03)
Cathodic reduction of N-(2-acyl(or aroyl)phenyl)-2,2,2,-trichloro-N-alkylacetamide at - 1.2 V (vs SCE) under aprotic conditions yields 3-chloro-1,4-disubstituted-2(1H)-quinolinones (1) as the major product. When the reaction is carried out at -0.8 V (vs S
1-Methyl-3-phenyl-3-thiocyanato-1H,3H-quinoline-2,4-dione: A Novel Thiocyanating Agent
Klasek, Antonin,Mrkvicka, Vladimir
, p. 747 - 752 (2007/10/03)
Under mild reaction conditions, the thiocyanato group is selectively transferred from 1-methyl-3-phenyl-3-thiocyanato-1H,3H-quinoline-2,4-dione (3) to some nucleophiles. Aliphatic primary and secondary amines are converted to S-cyanothiohydroxylamines, anilines afford p-thiocyanatoanilines, Wittig reagent is thiocyanated in α-position, and thiols are oxidized to disulfides.
