1889-77-6Relevant academic research and scientific papers
Reactivity of substrates with multiple competitive reactive sites toward NBS under neat reaction conditions promoted by visible light
Grjol, Bla?,Jereb, Marjan
, p. 5235 - 5248 (2021/06/07)
Regioselectivity of visible-light-induced transformations of a range of (hetero)aryl alkyl-substituted ketones bearing several competitive reactive sites (α-carbonyl, benzyl and aromatic ring) with N-bromosuccinimide (NBS) was studied under solvent-free reaction conditions (SFRC) and in the absence of inert-gas atmosphere, radical initiators and catalysts. An 8-W energy-saving household lamp was used for irradiation. Heterogeneous reaction conditions were dealt with throughout the study. All substrates were mono- or dibrominated at the α-carbonyl position, and additionally, some benzylic or aromatic bromination was observed in substrates with benzylic carbon atoms or electron-donating methoxy groups, respectively. Surprisingly, ipso-substitution of the acyl group with a bromine atom took place with (4-methoxynaphthyl) alkyl ketones. While the addition of the radical scavenger TEMPO (2,2,6,6-tetramethylpiperidin-1-yloxy) decreased the extent of α- and ring bromination, it completely suppressed the benzylic bromination and α,α-dibromination with NBS under SFRC.
Design, synthesis and biological evaluation of novel pyrrolidone-based derivatives as potent p53-MDM2 inhibitors
Si, Dongjuan,Luo, Huijuan,Zhang, Xiaomeng,Yang, Kundi,Wen, Hongmei,Li, Wei,Liu, Jian
, (2021/08/27)
Inhibition of the interactions of the tumor suppressor protein p53 with its negative regulators MDM2 in vitro and in vivo, representing a valuable therapeutic strategy for cancer treatment. The natural product chalcone exhibited moderate inhibitory activity against MDM2, thus based on the binding mode between chalcone and MDM2, a hit unsaturated pyrrolidone scaffold was obtained through virtual screening. Several unsaturated pyrrolidone derivatives were synthesized and biological evaluated. As a result, because the three critical hydrophobic pockets of MDM2 were occupied by the substituted-phenyl linked at the pyrrolidone fragment, compound 4 h demonstrated good binding affinity with the MDM2. Additionally, compound 4 h also showed excellent antitumor activity and selectivity, and no cytotoxicity against normal cells in vitro. The further antitumor mechanism studies were indicated that compound 4 h could successfully induce the activation of p53 and corresponding downstream p21 proteins, thus successfully causing HCT116 cell cycle arrest in the G1/M phase and apoptosis. Thus, the novel unsaturated pyrrolidone p53-MDM2 inhibitors could be developed as novel antitumor agents.
Discovery of the First in Vivo Active Inhibitors of the Soluble Epoxide Hydrolase Phosphatase Domain
Kramer, Jan S.,Woltersdorf, Stefano,Duflot, Thomas,Hiesinger, Kerstin,Lillich, Felix F.,Kn?ll, Felix,Wittmann, Sandra K.,Klingler, Franca-M.,Brunst, Steffen,Chaikuad, Apirat,Morisseau, Christophe,Hammock, Bruce D.,Buccellati, Carola,Sala, Angelo,Rovati, G. Enrico,Leuillier, Matthieu,Fraineau, Sylvain,Rondeaux, Julie,Hernandez-Olmos, Victor,Heering, Jan,Merk, Daniel,Pogoryelov, Denys,Steinhilber, Dieter,Knapp, Stefan,Bellien, Jeremy,Proschak, Ewgenij
, p. 8443 - 8460 (2019/10/16)
The emerging pharmacological target soluble epoxide hydrolase (sEH) is a bifunctional enzyme exhibiting two different catalytic activities that are located in two distinct domains. Although the physiological role of the C-terminal hydrolase domain is well-investigated, little is known about its phosphatase activity, located in the N-terminal phosphatase domain of sEH (sEH-P). Herein we report the discovery and optimization of the first inhibitor of human and rat sEH-P that is applicable in vivo. X-ray structure analysis of the sEH phosphatase domain complexed with an inhibitor provides insights in the molecular basis of small-molecule sEH-P inhibition and helps to rationalize the structure-activity relationships. 4-(4-(3,4-Dichlorophenyl)-5-phenyloxazol-2-yl)butanoic acid (22b, SWE101) has an excellent pharmacokinetic and pharmacodynamic profile in rats and enables the investigation of the physiological and pathophysiological role of sEH-P in vivo.
BF3·OEt2-mediated [1,2]-aryl shift: Synthesis of functionalized α-arylnitriles via the bromination/cyanation/deformylation of substituted deoxybenzoin
Chan, Chieh-Kai,Chang, Meng-Yang
, p. 5207 - 5213 (2017/07/28)
A new sequential, tandem synthesis of functionalized α-arylnitriles via the bromination/cyanation/deformylation of substituted deoxybenzoin has developed. CuBr2-promoted bromination of substituted deoxybenzoins gives 2-bromo-2-arylacetophenne 3. The cyanation of 3 with sodium cyanide (NaCN) generates epoxynitrile. Then, a treatment of epoxynitrile with BF3·OEt2 results in the formation of functionalized α-arylnitriles 4 via a 1,2-aryl shift.
Thiazole Compounds and Uses Thereof
-
Paragraph 0034; ; 0062; 0063; 0064, (2015/05/05)
The present invention relates to a compound of Formula (I), or an isomer, pharmaceutically acceptable salt and solvate thereof; the present invention further relates to a pharmaceutical composition, which comprises the compound of Formula (I), or isomer, pharmaceutically acceptable salt or solvate thereof, and a pharmaceutically acceptable carrier, excipient or diluents; the present invention further relates to the use of the compound of Formula (I), or isomer, pharmaceutically acceptable salt or solvate thereof, for anti-apoptosis, prophylaxis or treatment of a disease or symptom associated with apoptosis, especially for protecting myocardial cells, and prophylaxis or treatment of a disease or symptom associated with cardiomyocyte apoptosis.
Synthesis, cytotoxic evaluation, and molecular docking study of 4,5-diaryl-thiazole-2-thione analogs of combretastatin A-4 as microtubule-binding agents
Salehi, Marjan,Ostad, Seyed Nasser,Riazi, Gholam Hossein,Assadieskandar, Amir,Cheraghi-Shavi, Tayebeh,Shafiee, Abbas,Amini, Mohsen
, p. 1465 - 1473 (2014/03/21)
A series of combretastatin A-4 analogs in which cis-olefinic bond replaced by thiazole ring were prepared by reaction of α-bromo-1,2-(p-substituted) diaryl-1-ethanones and dithiocarbamate derivatives. The cytotoxicity of these compounds was determined against three cancer cell lines (HT-29), (MCF-7), (AGS) as well as fibroblastic cell line (NIH-3T3) using MTT assay. Inhibition of tubulin polymerization for some potent compounds was evaluated. These biological studies proved that 6j and 6o were the most potent compounds in this series. Furthermore 2-(methylthio)-substituted compounds show moderate or no activity. Docking studies involving 6j and 6o demonstrated that this analogs could be successfully docked in the colchicine binding site of α,β-tubulin.
Convenient and regiospecific method for synthesis of 4,5-diaryl-1-methyl-2- (methylthio)-1H-imidazole
Assadieskandar, Amir,Salehi, Marjan,Vosooghi, Mohsen,Shafiee, Abbas,Amini, Mohsen
, p. 2501 - 2507 (2013/07/25)
A convenient, high-yielding, regiospecific synthesis of 1H-imidazole-2-thiones ring has been developed. In addition, a series of 4,5-diaryl-1-methyl-2-(methylthio)-1H-imidazoles 8 were synthesized and characterized. The structure of regioisomers was confirmed through nuclear Overhauser effect spectroscopy and NMR spectroscopy. Copyright
SAR, cardiac myocytes protection activity and 3D-QSAR studies of salubrinal and its potent derivatives
Liu,He,Li,Li,Liu,Zhong,Li
, p. 6072 - 6079 (2013/02/22)
Salubrinal is a selective inhibitor of endoplasmic reticulum (ER) stress and affords remarkable protection to cardiomyocytes. By studying the structure-activity relationship (SAR) of salubrinal, it was found that modification of the quinoline ring terminus and thiourea unit could confer the compound PP1-24 with markedly enhanced cardioprotective activity (EC 50 2 = 0.741, r2 = 0.991).
Synthesis and antibacterial activity of a novel series of 2,3-diaryl-substituted-imidazo(2,1-b)-benzothiazole derivatives
Palkar, Mahesh,Noolvi, Malleshappa,Sankangoud, Ramappa,Maddi, Veeresh,Gadad, Andanappa,Nargund, Laxmi Venkat G.
experimental part, p. 353 - 359 (2011/07/08)
Benzothiazole and imidazole compounds are extensively studied heterocyclics due to their wide spectrum of bioactivities. Among them, the imidazo(2,1-b)-benzothiazole derivatives are pharmacologically important because of their immunostimulant, anti-inflammatory, antifungal, antimicrobial, antitumor, and other activities. In the present research work, a novel series of 2,3-diaryl-substituted imidazo(2,1-b)-benzothiazoles 13a-o have been synthesized by reaction of substituted 2-aminobenzothiazoles 1-8 and an appropriately substituted a-bromo-1-(4″-substituted)-phenyl-2-(4′- substituted)-phenyl-1-ethanones 9-12 in the presence of anhydrous acetonitrile. They were characterized by physicochemical, elemental, and spectral (IR, 1H-NMR, and Mass) data. All the synthesized compounds were screened for their in-vitro antibacterial activity against Gram-positive, Gram-negative bacteria. The investigation of antibacterial screening data revealed that most of the compounds tested have demonstrated congruent activity against Staphylococcus aureus, Bacillus subtilis, Escherichia coli, and Pseudomonas aeruginosa as compared with the standard ampicillin. Among the series, compounds 13d, 13h, and 13m exhibited excellent an antibacterial activity profile as compared with the standard. In summary, preliminary results indicate that some of the newly synthesized title compounds exhibited promising antibacterial activities and they warrant more consideration as prospective antimicrobials.
FURANOPYRIMIDINES
-
Page/Page column 77, (2010/02/15)
The present invention relates to furanopyrimidine compounds having the general Formula (I) and stereoisomers, tautomers, solvates, pharmaceutically acceptable salts and derivatives, and prodrugs thereof. The invention also includes pharmaceutical compositions comprising a compound of Formula (I), methods of treating various diseases and conditions in a mammal, including inflammation, inhibition of T cell activation, proliferation, arthritis, organ transplant, ischemic or reperfusion injury, myocardial infarction, stroke, multiple sclerosis, inflammatory bowel disease, Crohn's disease, lupus, hypersensitivity, type 1 diabetes, psoriasis, dermatitis, Hashimoto's thyroiditis, Sjogren's syndrome, autoimmune hyperthyroidism, Addison's disease, autoimmune diseases, glomerulonephritis, allergic diseases, asthma, hayfever, eczema, cancer, colon carcinoma and thymoma, comprising administering to the mammal a therapeutically effective amount of a compound of Formula (I). The invention also relates to methods of manufacturing medicaments, which comprise one or more compounds of Formula (I).
