84055-81-2Relevant academic research and scientific papers
Indoloquinoxaline derivatives as promising multi-functional anti-Alzheimer agents
Kanhed, Ashish M.,Patel, Dushyant V.,Patel, Nirav R.,Sinha, Anshuman,Thakor, Priyanka S.,Patel, Kishan B.,Prajapati, Navnit K.,Patel, Kirti V.,Yadav, Mange Ram
, p. 2498 - 2515 (2020/11/02)
To confront a disease like Alzheimer’s disease having complex pathogenesis, development of multitarget-directed ligands has emerged as a promising drug discovery approach. In our endeavor towards the development of multitarget-directed ligands for Alzheimer’s disease, a series of indoloquinoxaline derivatives were designed and synthesized. In vitro cholinesterase inhibition studies revealed that all the synthesized compounds exhibited moderate to good cholinesterase inhibitory activity. 6-(6-(Piperidin-1-yl)hexyl)-6H-indolo[2,3-b]quinoxaline 9f was identified as the most potent and selective BuChE inhibitor (IC50 = 0.96 μM, selectivity index = 0.17) that possessed 2 fold higher BuChE inhibitory activity compared to the commercially approved reference drug donepezil (IC50 = 1.87 μM). Moreover, compound 9f is also endowed with self-induced Aβ1-42 aggregation inhibitory activity (51.24% inhibition at 50 μM concentration). Some of the compounds of the series also displayed moderate anti-oxidant activity. To perceive a putative binding mode of the compound 9f, molecular docking studies were carried out, and the results pointed out significant interactions of compound 9f with the enzymes in the binding sites of cholinesterases as well as Aβ1-42. Additionally, compound 9f exhibited favorable in silico ADMET properties. Put together these findings project compound 9f as a potential multitarget-directed ligand in the direction of developing novel anti-AD drugs. Communicated by Ramaswamy H. Sarma.
Propargylamines in Pd/Cu-catalyzed tandem coupling-cyclization-N-deprotection in a single pot: Construction of N-unsubstituted vs N-sulfonyl indole ring
Sujeevan Reddy, Gangireddy,Sandeep Kumar, Jetta,Thirupataiah,Amirul Hossain, Kazi,Babu Nallapati, Suresh,Bhat Giliyaru, Varadaraj,Chandrashekhar Hariharapura, Raghu,Gautham Shenoy,Pal, Manojit
supporting information, (2021/06/18)
The Pd/Cu-catalyzed tandem coupling–cyclization-N-deprotection in a single pot (Method a) vs sequential coupling–cyclization under similar conditions (Method b) has been studied using propargylamine as a terminal alkyne under environmentally friendly cond
Self-assembled quinoxaline derivative: Insight into disaggregation induced selective detection of nitro-aromatics in aqueous medium and live cell imaging
Basak, Megha,Bhattacharjee, Basu,Das, Gopal,Ramesh, Aiyagari
, (2021/09/07)
Advancement in fluorescent chemosensor for discriminative and precise detection of picric acid (PA) in aqueous medium is highly desirable owing to its alarming impact on the natural environment via soil and groundwater pollution. To this end, we have successfully fabricated a quinoxaline-based receptor (Probe 1) to detect PA in 100% aqueous medium. Probe 1 self-assembled to form leaf-like structures in pure water as micro aggregates (～940 nm) and transformed entirely into smaller spherical shape (～354 nm) upon addition of PA. DFT analysis and lifetime experiment validated that both PET and FRET from the electron-rich Probe 1 to electron-deficient PA are concurrently responsible for effective fluorescence quenching. The self-assembled probe exhibited excellent selectivity towards PA (Ksv of 22.6 × 106 M?1) with a ～56 ppb detection limit. Importantly, PA detection on solution-coated paper strips was achieved at the picogram level. Furthermore, to evaluate the practical usefulness, the probe has been used to detect PA in actual water and soil samples. Interestingly, Probe 1 was non-toxic to cultured HeLa cells and rendered detection of intracellular picric acid through live cell imaging.
Br?nsted acid hydrotrope combined catalysis in water: a green approach for the synthesis of indoloquinoxalines and bis-tetronic acids
Kumbhar, Arjun,Kanase, Dhanaji,Mohite, Suhas,Salunkhe, Rajshri,Lohar, Trushant
, p. 2263 - 2278 (2021/03/31)
The present work describes the applications of Br?nsted acid hydrotrope combined catalyst (BAHC) as a mild, efficient and reusable catalyst for synthesis of indoloquinoxalines and bis-tetronic acids in water. Using BAHC, we synthesized many indoloquinoxal
Activities of quinoxaline, nitroquinoxaline, and [1,2,4]triazolo [4,3-a]quinoxaline analogs of mmv007204 against schistosoma mansoni
Debbert, Stefan L.,Hintz, Mikaela J.,Bell, Christian J.,Earl, Kenya R.,Forsythe, Grant E.,H?berli, Cécile,Keiser, Jennifer
supporting information, (2021/03/04)
The reliance on one drug, praziquantel, to treat the parasitic disease schistosomiasis in millions of people a year shows the need to further develop a pipeline of new drugs to treat this disease. Recently, an antimalarial quinoxaline derivative (MMV007204) from the Medicines for Malaria Venture (MMV) Malaria Box demonstrated promise against Schistosoma mansoni. In this study, 47 synthesized compounds containing quinoxaline moieties were first assayed against the larval stage of this parasite, newly transformed schistosomula (NTS); of these, 16 killed over 70% NTS at 10mM. Further testing against NTS and adult S. mansoni yielded three compounds with 50% inhibitory concentrations (IC50s) of#0.31mM against adult S. mansoni and selectivity indices of$8.9. Administration of these compounds as a single oral dose of 400mg/kg of body weight to S. mansoni-infected mice yielded only moderate worm burden reduction (WBR) (9.3% to 46.3%). The discrepancy between these compounds' good in vitro activities and their poor in vivo activities indicates that optimization of their pharmacokinetic properties may yield compounds with greater bioavailabilities and better antischistosomiasis activities in vivo.
Synthesis of New 2-(6H-Indolo[2,3-b]quinoxalin-6-yl)-1-phenylethane-1-ones
Grekhneva, E. V.,Kudryavcev, T. A.,Kudryavtseva, T. N.,Lamanov, A. Y.,Melnichenko, V. E.
, p. 2114 - 2117 (2021/11/13)
Abstract: A series of new 2-(6H-indolo[2,3-b]quinoxalin-6-yl)-1-phenylethan-1-ones was synthesized by the reaction of various 6H-indolo[2,3-b]quinoxalines with 4-substituted 2-bromophenylethan-1-ones in a DMSO–K2CO3 system.
One-Pot Construction of Indolo[2,3- b]quinoxalines through Ruthenium-Catalyzed Ortho C-H Bond Functionalization of 2-Arylquinoxalines with Sulfonyl Azides
Laru, Sudip,Bhattacharjee, Suvam,Ghosh, Sumit,Hajra, Alakananda
, p. 7624 - 7629 (2021/10/12)
The synthesis of N-substituted indolo[2,3-b]quinoxalines has been developed through a Ru(II)-catalyzed ortho C-H functionalization of 2-arylquinoxalines with sulfonyl azides and further oxidation with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in one pot. This double C-N bond formation strategy provides a new efficient route for the preparation of a series of biologically relevant 6H-indolo[2,3-b]quinoxaline derivatives in up to 94% yield, suggesting a broad substrate scope applicability. The preliminary mechanistic studies reveal that the sequential C-N bond formations proceed through the formation of a five-membered ruthenacyclic intermediate in the first step and a radical mechanism in the second step.
Synthesis and Some Reactions of 6H-Indolo[2,3-b]quinoxalines
Shulga,Shulga
, p. 2104 - 2108 (2021/02/09)
Abstract: 6H-Indolo[2,3-b]quinoxalines were synthesized by condensation of isatin and 5-nitroisatin with o-phenylenediamine. The alkylation of the title compounds with dimethyl sulfate gave the corresponding quaternary salts which were converted to perchlorates and oxidized with potassium hexacyanoferrate(III) to previously unknown 5-methyl-6H-indolo[2,3-b]quinoxalin-3-one and its 9-nitro derivative. Treatment of 6H-indolo[2,3-b]quinoxalin-3-ones with dimethyl sulfate afforded 3-methoxyindoloquinoxalinium salts which were demethylated by the action of hydrobromic acid at 130–140°C. The structure of the isolated compounds was confirmed by IR and NMR spectra and elemental analyses.
Electron transporting and hole blocking organic material and application thereof in thin-film light-emitting diode
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Paragraph 0005, (2020/11/02)
The invention provides an electron transporting and hole blocking material with an A-D-A link structure as a core. The material is applied to a thin-film semiconductor light-emitting diode, for example, an organic light-emitting diode and a quantum dot thin-film light-emitting diode; and the molecule of the material takes bipolar carbazole and a derivative group thereof as electron donating centers, so a relatively high triplet state energy level can be maintained to ensure exciton blocking capability.
NON-PEPTIDIC GLUCAGON-LIKE PEPTIDE-1 RECEPTOR AGONISTS AND METHOD OF PREPARATION THEREOF
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Page/Page column 9; 12; 34, (2020/06/19)
The present invention provides novel compounds, which specifically bind with GLP-1R and which have beneficial effects as therapeutics for diabetes and other metabolic diseases. The present invention also describes the process of synthesis of said novel co
