- Sulfonamide-based 4-anilinoquinoline derivatives as novel dual Aurora kinase (AURKA/B) inhibitors: Synthesis, biological evaluation and in silico insights
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Aurora kinases (AURKs) were identified as promising druggable targets for targeted cancer therapy. Aiming at the development of novel chemotype of dual AURKA/B inhibitors, herein we report the design and synthesis of three series of 4-anilinoquinoline derivatives bearing a sulfonamide moiety (5a-d, 9a-d and 11a-d). The percent inhibition of AURKA/B was determined for all target quinolines, then compounds showed more than 50percent inhibition on either of the enzymes, were evaluated further for their IC50 on the corresponding enzyme. In particular, compound 9d displayed potent AURKA/B inhibitory activities with IC50 of 0.93 and 0.09 μM, respectively. Also, 9d emerged as the most efficient anti-proliferative analogue in the US-NCI anticancer assay toward the NCI 60 cell lines panel, with broad spectrum activity against different cell lines from diverse cancer subpanels. Docking studies, confirmed that, the sulfonamide SO2 oxygen was involved in a hydrogen bond with Lys162 and Lys122 in AURKA and AURKB, respectively, whereas, the sulfonamide NH could catch hydrogen bond interaction with the surrounding amino acid residues Lys141, Glu260, and Asn261 in AURKA and Lys101, Glu177, and Asp234 in AURKB. Furthermore, N1 nitrogen of the quinoline scaffold formed an essential hydrogen bond with the hinge region key amino acids Ala213 and Ala173 in AURKA and AURKB, respectively.
- Abdelgawad, Mohamed A.,Al-Sanea, Mohammad M.,Alharbi, Khalid S.,Ali Farahat, Ibrahim,Alzarea, Abdulaziz I.,Alzarea, Sami I.,Bakr, Rania B,El Kerdawy, Ahmed M.,Eldehna, Wagdy M.,Elkamhawy, Ahmed,Elshemy, Heba A. H.,Joo Roh, Eun,Lee, Kyeong,Paik, Sora,Syed Nasir Abbas, Bukhari
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- A multifunctional therapeutic approach: Synthesis, biological evaluation, crystal structure and molecular docking of diversified 1H-pyrazolo[3,4-b]pyridine derivatives against Alzheimer's disease
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2-(piperazin-1-yl)–N-(1H-pyrazolo[3,4-b]pyridin-3-yl)acetamides are described as a new class of selective and potent acetylcholinesterase (AChE) inhibitors and amyloid β aggregation inhibitors. Formation of synthesized compounds (P1–P9) was justified via H1 NMR, C13 NMR, mass spectra and single crystal X-Ray diffraction study. All compounds were evaluated for their acetylcholinesterase and butyrylcholinesterase inhibitory activity, inhibition of self-mediated Aβ aggregation and Cu(II)-mediated Aβ aggregation. Also, docking study carried out was in concordance with in vitro results. The most potent molecule amongst the derivatives exhibited excellent anti-AChE activity (IC50 = 4.8 nM). Kinetic study of P3 suggested it to be a mixed type inhibitor. In vitro study revealed that all the compounds are capable of inhibiting self-induced β-amyloid (Aβ) aggregation with the highest inhibition percentage to be 81.65%. Potency of P1 and P3 to inhibit self-induced Aβ1-42 aggregation was ascertained by TEM analysis. Compounds were also evaluated for their Aβ disaggregation, antioxidation, metal-chelation activity.
- Umar, Tarana,Shalini, Shruti,Raza, Md Kausar,Gusain, Siddharth,Kumar, Jitendra,Seth, Prerna,Tiwari, Manisha,Hoda, Nasimul
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- Synthesis and biological evaluation of novel 3-(quinolin-4-ylamino)benzenesulfonamidesAQ3 as carbonic anhydrase isoforms I and II inhibitors
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Carbonic anhydrases (CAs, EC 4.2.1.1) are crucial metalloenzymes that are involved in diverse bioprocesses. We report the synthesis and biological evaluation of novel series of benzenesulfonamides incorporating un/substituted ethyl quinoline-3-carboxylate moieties. The newly synthesised compounds were in vitro evaluated as inhibitors of the cytosolic human (h) isoforms hCA I and II. Both isoforms hCA I and II were inhibited by the quinolines reported here in variable degrees: hCA I was inhibited with KIs in the range of 0.966–9.091 μM, whereas hCA II in the range of 0.083–3.594 μM. The primary 7-chloro-6-flouro substituted sulphfonamide derivative 6e (KI = 0.083 μM) proved to be the most active quinoline in inhibiting hCA II, whereas, its secondary sulfonamide analog failed to inhibit the hCA II up to 10 μM, confirming the crucial role of the primary sulphfonamide group, as a zinc-binding group for CA inhibitory activity.
- Al-Sanea, Mohammad M.,Elkamhawy, Ahmed,Paik, Sora,Bua, Silvia,Ha Lee, So,Abdelgawad, Mohamed A.,Roh, Eun Joo,Eldehna, Wagdy M.,Supuran, Claudiu T.
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p. 1457 - 1464
(2019/08/26)
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- Synthesis and pharmacological evaluation of pyrazolo[4,3-c]quinolinones as high affinity GABAA-R ligands and potential anxiolytics
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The synthesis, in vitro ligand binding study and in vivo Elevated Plus Maze test (EPM) of a series of pyrazolo[4,3-c]quinolin-3-ones (PQs) are reported. Multistep synthesis of PQs started from anilines and diethyl 2-(ethoxymethylene)malonate to give the q
- López Rivilli, Marisa J.,Turina, Anahí V.,Bignante, Elena A.,Molina, Victor H.,Perillo, María A.,Bri?on, Margarita C.,Moyano, Elizabeth L.
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p. 3967 - 3974
(2018/06/29)
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- Synthesis and preliminary structure-activity relationship study of 2-aryl-2H-pyrazolo[4,3-c]quinolin-3-ones as potential checkpoint kinase 1 (Chk1) inhibitors
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The serine-threonine checkpoint kinase 1 (Chk1) plays a critical role in the cell cycle arrest in response to DNA damage. In the last decade, Chk1 inhibitors have emerged as a novel therapeutic strategy to potentiate the anti-tumour efficacy of cytotoxic chemotherapeutic agents. In the search for new Chk1 inhibitors, a congeneric series of 2-aryl-2 H-pyrazolo[4,3-c]quinolin-3-one (PQ) was evaluated by in-vitro and in-silico approaches for the first time. A total of 30 PQ structures were synthesised in good to excellent yields using conventional or microwave heating, highlighting that 14 of them are new chemical entities. Noteworthy, in this preliminary study two compounds 4e2 and 4h2 have shown a modest but significant reduction in the basal activity of the Chk1 kinase. Starting from these preliminary results, we have designed the second generation of analogous in this class and further studies are in progress in our laboratories.
- Malvacio, Ivana,Cuzzolin, Alberto,Sturlese, Mattia,Vera, D. Mariano A.,Moyano, E. Laura,Moro, Stefano
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p. 171 - 183
(2017/12/26)
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- Small Molecule Agonists and Antagonists of NR2F6 Activity in Humans
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The present technology is directed to modulators of nuclear receptor activity, specifically to the modulation of NR2F6 activity and NR2F6 utilizing compounds, and the immune modulation and modulation of cancer stem cell activity through administration of
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Paragraph 0053; 0224
(2018/08/20)
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- Tetracyclic lactam compound, preparation method and application thereof
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The invention relates to a tetracyclic lactam compound, or a tautomer, a stereisomer, racemate, a non-equivalent mixture of an enantiomer, a geometrical isomer, a solvate, medically acceptable salt orprodrug thereof, and a drug combination containing the same. The invention further discloses application of the tetracyclic lactam compound or the drug combination serving as drugs, particularly as antibacterial, antiviral and antiparasitic drugs.
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Paragraph 0163
(2018/10/19)
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- Lactam-containing tetracyclic derivative as well as preparation method and application thereof
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The invention relates to a lactam-containing tetracyclic derivative, or a heterogeneous mixture of a tautomer, a stereoisomer, a raceme and an enantiomer of the lactam-containing tetracyclic derivative, a geometrical isomer, a solvate, medically acceptable salt or a prodrug, and a drug composition containing the compound. The invention further discloses use of the compound and the drug compositionthereof as an insecticide, a bactericide and a herbicide in the agricultural field.
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Paragraph 0113; 0114
(2018/10/27)
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- Synthesis and screening of triazolopyrimidine scaffold as multi-functional agents for Alzheimer's disease therapies
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In present study a series of triazolopyrimidine-quinoline and cyanopyridine-quinoline hybrids were designed, synthesized and evaluated as acetylcholinesterase inhibitors (AChEIs). Molecular docking and scoring was utilized for the design of inhibitors. The molecules were synthesized via an easily accessible, convergent synthetic route. Three triazolopyrimidine based compounds showed nanomolar activity towards acetylcholinesterase. Among them, Ethyl 6-fluoro-4-(4-(5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)piperazin-1-yl)quinoline-3-carboxylate (10d), strongly inhibited AChE with IC50 value of 42 nM. Furthermore compound 10d was identified as most promising compound with 12 fold selectivity against butyrylcholinesterase (BuChE). This compound displayed a composed multitargeted profile with promising inhibition of self-induced and AChE - induced Aβ aggregation and antioxidant activity.
- Kumar, Jitendra,Meena, Poonam,Singh, Anju,Jameel, Ehtesham,Maqbool, Mudasir,Mobashir, Mohammad,Shandilya, Ashutosh,Tiwari, Manisha,Hoda, Nasimul,Jayaram
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p. 260 - 277
(2016/06/01)
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- Structural evaluation of three 2-phenylpyrazolo[4,3-c]quinolin-3-one monohydrates
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A single crystal X-ray diffraction and theoretical study has been carried out on mono hydrates of three 2H-pyrazolo[4,3-c]quinolin-3(5H)-one derivatives, namely 6-methyl-2-phenylpyrazolo[4,3-c]quinolin-3-one, 3, 6-methyl-2-(4- chlorophenyl)pyrazolo[4,3-c]quinolin-3-one, 4, and 8-methyl-2-(4-nitrophenyl) pyrazolo[4,3-c]quinolin-3-one, 5. The monohydrates were obtained on recrystallization from moist solvents. While there are three tautomeric forms possible for such pyrazolo[4,3-c]quinolin-3-one molecules, the sole form isolated in the solid [(X)×(H2O)] (X = 3, 4 and 5) compounds was the quinoloid form - the one calculated to be the most stable at the M06-2X/6-311++G(d,p) level of theory. Excellent agreement was found between the calculated and X-ray determined structures. Molecule 5 in [(5)×(H 2O)] is very near planar while both molecules 3 and 4 in their respective hydrates are much less so as a consequence of angles about 24 between the two aromatic rings. In each hydrate, the pyrazolo[4,3-c]quinolin-3-one molecule is bonded to three water molecules and each water molecule is likewise H-bonded to three pyrazolo[4,3-c]quinolin-3-one molecules. While the water molecules are H-bonded to 3 and 4 via the pyridinyl N and 2x the carbonyl O atoms, in [(5)×(H2O)] the H-bonds are to pyridinyl N, carbonyl O and a nitro O atoms. Calculations indicated that the found arrangement in [(5)×(H2O)] is more stable than one using the connections as found in [(3)×(H2O)] and [(4)×(H2O)]. While each of the hydrates possess strong N-H?O and O-H?O hydrogen bonds, and weaker C-H?π and π?π interactions, the supramolecular arrays are very different.
- Ferreira, Vitor F.,Leal, Katia Z.,Lindgren, Eric B.,De Oliveira, Mara R.P.,De Souza, Maria Celia B.V.,Vasconcelos, Thatyana R.A.,Wardell, James L.,Wardell, Solange M.S.V.,Yoneda, Julliane D.
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p. 299 - 309
(2013/10/08)
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- Discovery of plasmodium vivax N -myristoyltransferase inhibitors: Screening, synthesis, and structural characterization of their binding mode
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N-Myristoyltransferase (NMT) is a prospective drug target against parasitic protozoa. Herein we report the successful discovery of a series of Plasmodium vivax NMT inhibitors by high-throughput screening. A high-resolution crystal structure of the hit com
- Goncalves, Victor,Brannigan, James A.,Whalley, David,Ansell, Keith H.,Saxty, Barbara,Holder, Anthony A.,Wilkinson, Anthony J.,Tate, Edward W.,Leatherbarrow, Robin J.
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supporting information; experimental part
p. 3578 - 3582
(2012/06/01)
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- Synthesis and anticancer activities of some novel 2-(benzo[d]thiazol-2-yl)- 8-substituted-2H-pyrazolo[4,3-c]quinolin-3(5H)-ones
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A series of 2-(benzo[d]thiazol-2-yl)-8-substituted-2H-pyrazolo[4,3-c] quinolin-3(5H)-ones (3a-g) have been synthesized and evaluated for their in vitro antiproliferative activities against four human cancer cell lines: MDA-MB-435 (breast), HL-60 (leukemia), HCT-8 (colon) and SF-295 (central nervous system). The results showed that the compounds 3b (2-(benzo[d]thiazol-2-yl)-8- methyl-2H-pyrazolo[4,3-c]quinolin-3(5H)-one) and 3c (2-(benzo[d]thiazol-2-yl)-8- bromo-2H-pyrazolo[4,3-c]quinolin-3(5H)-one) exhibited good cytotoxicity for three cell lines with IC50 values lower than 5 μg/mL. Analysis of theoretical toxicity risks have shown medium tumorigenic and irritant risks related to 3b and 3c in contrast to doxorubicin, the positive control.
- Reis, Raísa Da R.,Azevedo, Elisa C.,De Souza, Maria Cecília B.V.,Ferreira, Vitor Francisco,Montenegro, Raquel C.,Araújo, Ana Jérsia,Pessoa, Cláudia,Costa-Lotufo, Letícia V.,De Moraes, Manoel O.,Filho, José D.B.M.,De Souza, Alessandra M.T.,De Carvalho, Natasha C.,Castro, Helena C.,Rodrigues, Carlos R.,Vasconcelos, Thatyana R.A.
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p. 1448 - 1452
(2011/04/24)
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- Synthesis and Na+/H+ exchanger-1 inhibitory activity of substituted (quinolinecarbonyl)guanidine derivatives
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The Na+/H+ exchanger (NHE) is a protein expressed in many mammalian cell types. It is involved in intracellular pH (pHi) homeostasis by exchanging extracellular Na+ for intracellular H +. To date, nine NHE isoforms (NHE1-NHE9) have been identified. NHE1 is the most predominant isoform expressed in mammalian cardiac muscle. A novel series of substituted (quinolinecarbonyl)guanidine derivatives were designed and synthesized as NHE inhibitors. Most compounds can inhibit NHE1-mediated platelet swelling in a concentration-dependent manner, among which compound 7f was the most active and more potent than cariporide. Furthermore, compound 7f has also been demonstrated to exhibit the in vivo cardioprotective effects against SD rat myocardial ischemic-reperfusion injury superior to those of cariporide.
- Mao, Dan,Xu, Yungen,Hu, Xiaoping,Zhang, Guomin,Dong, Jin,Gong, Guoqing
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experimental part
p. 1727 - 1736
(2010/05/18)
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- THERAPEUTIC PYRAZOLOQUINOLINE UREA DERIVATIVES
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The invention provides a novel chemical series of formula I, as well as methods of use thereof for binding to the benzodiazepine site of the GABAA receptor and modulating GABAA, and use of the compound of formula I for the treatment
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Page/Page column 20
(2009/01/20)
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- Synthesis and antiviral activities of new pyrazolo[4,3-c]quinolin-3-ones and their ribonucleoside derivatives
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Several new pyrazolo[4,3-c]quinolin-3-one ribonucleosides (5a-g) and their corresponding heterocycle moieties (3a-g) were synthesized and evaluated against vaccinia virus (VV) and herpes simplex virus type 1 (HSV-1). The derivatives 3c and 3d showed modes
- De Oliveira, Mara R. P.,Alves, Thatyana R.,Pinto, Angelo C.,Pereira, Helena De S.,Leao-Ferreira, Luiz R.,Moussatche, Nissin,Frugulhetti, Izabel Christina De P. P.,Ferreira, Vitor F.,De Souza, Maria Cecilia B. V.
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p. 735 - 748
(2007/10/03)
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- Structure-activity relationship investigations of the modulating effect of core substituents on the affinity of pyrazoloquinolinone congeners for the benzodiazepine receptor
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A series of 6- and 7-substituted-2-arylpyrazolo [4,3-c] quinolin-3-ones was synthesized and tested in vitro for binding with the benzodiazepine receptor in competition with [3H]flunitrazepam. Electronic parameters (molecular electrostatic potential (MEP), charge distribution on the nitrogen atoms, dipole moment μ, and ionization potential (IP) were calculated for the compounds by semi-empirical quantum chemistry methods. Lipophilicity of the compounds, expressed as logarithm of the octanol-water partition coefficient (log P), was calculated by the program Pallas. A quantitative correlation of the biological data with molecular parameters revealed a significant dependence (r = 0.95) of the activity on hydrophobic constants of the substituents, log P, and magnitude of the MEP minimum associated with the carbonyl oxygen atom.
- Karolak-Wojciechowska, Janina,Lange, Jerzy,Ksiazek, Waldemar,Gniewosz, Malgorzata,Rump, Slawomir
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p. 579 - 585
(2007/10/03)
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- Quinoline derivatives having anti-tumor activity
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The invention relates to a quinoline of the formula: STR1 wherein each of R1 and R2, which may be the same or different, is hydrogen, halogeno, hydroxy, cyano, carbamoyl, nitro or amino, alkyl, alkoxy, alkylthio, alkylamino, dialkyla
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