30766-11-1Relevant academic research and scientific papers
Fusaric acid and derivatives as novel antimicrobial agents
Thanh, Tung Truong,Quoc, Thang Nguyen,Xuan, Huy Luong
, p. 1689 - 1696 (2020)
The synthesis and screening of several fusaric acid (FA) and analogues against five common clinical pathogens (gram-positive and gram-negative) and in vitro hemolytic activity assay in human red blood cells, for the first time, were reported. The biological results reveal that FA and its analogues exhibited moderate antimicrobial activities. Compounds 2–5 and 7 showed growth inhibitory activity in gram-positive bacteria. Compounds 6 and 9 showed growth inhibitory activity in both gram-positive and gram-negative bacteria. None of the compounds induce hemolysis, which is potent for future drug development on this template. In addition, the structure–activity relationship and docking studies are discussed.
Synthesis and SAR studies of novel 1,2,4-oxadiazole-sulfonamide based compounds as potential anticancer agents for colorectal cancer therapy
Abid, Mohammad,Alajmi, Mohamed F.,Garrison, Jered,Hasan, Phool,Hussain, Afzal,Imtaiyaz Hassan, Md,Khan, Parvez,King, Hannah M.,Queen, Aarfa,Rana, Sandeep,Rizvi, M. Moshahid Alam,Shamsi, Farheen,Zahid, Muhammad,Zeya, Bushra
, (2020/03/23)
A diverse series of 1,2,4-oxadiazoles based substituted compounds were designed, synthesized and evaluated as anticancer agents targeting carbonic anhydrase IX (CAIX). Initial structure-activity analysis suggested that the thiazole/thiophene-sulfonamide conjugates of 1,2,4-oxadiazoles exhibited potent anticancer activities with low μM potencies. Compound OX12 exhibited antiproliferative activity (IC50 = 11.1 μM) along with appreciable inhibition potential for tumor-associated CAIX (IC50 = 4.23 μM) isoform. Therefore, OX12 was structurally optimized and its SAR oriented derivatives (OX17-27) were synthesized and evaluated. This iteration resulted in compound OX27 with an almost two-fold increase in antiproliferative effect (IC50 = 6.0 μM) comparable to the clinical drug doxorubicin and significantly higher potency against CAIX (IC50 = 0.74 μM). Additionally, OX27 treatment decreases the expression of CAIX, induces apoptosis and ROS production, inhibited colony formation and migration of colon cancer cells. Our studies provide preclinical rational for the further optimization of identified OX27 as a suitable lead for the possible treatment of CRC.
A biocatalytic method for the chemoselective aerobic oxidation of aldehydes to carboxylic acids
Knaus, Tanja,Tseliou, Vasilis,Humphreys, Luke D.,Scrutton, Nigel S.,Mutti, Francesco G.
supporting information, p. 3931 - 3943 (2018/09/11)
Herein, we present a study on the oxidation of aldehydes to carboxylic acids using three recombinant aldehyde dehydrogenases (ALDHs). The ALDHs were used in purified form with a nicotinamide oxidase (NOx), which recycles the catalytic NAD+ at the expense of dioxygen (air at atmospheric pressure). The reaction was studied also with lyophilised whole cell as well as resting cell biocatalysts for more convenient practical application. The optimised biocatalytic oxidation runs in phosphate buffer at pH 8.5 and at 40 °C. From a set of sixty-one aliphatic, aryl-Aliphatic, benzylic, hetero-Aromatic and bicyclic aldehydes, fifty were converted with elevated yield (up to >99%). The exceptions were a few ortho-substituted benzaldehydes, bicyclic heteroaromatic aldehydes and 2-phenylpropanal. In all cases, the expected carboxylic acid was shown to be the only product (>99% chemoselectivity). Other oxidisable functionalities within the same molecule (e.g. hydroxyl, alkene, and heteroaromatic nitrogen or sulphur atoms) remained untouched. The reaction was scaled for the oxidation of 5-(hydroxymethyl)furfural (2 g), a bio-based starting material, to afford 5-(hydroxymethyl)furoic acid in 61% isolated yield. The new biocatalytic method avoids the use of toxic or unsafe oxidants, strong acids or bases, or undesired solvents. It shows applicability across a wide range of substrates, and retains perfect chemoselectivity. Alternative oxidisable groups were not converted, and other classical side-reactions (e.g. halogenation of unsaturated functionalities, Dakin-Type oxidation) did not occur. In comparison to other established enzymatic methods such as the use of oxidases (where the concomitant oxidation of alcohols and aldehydes is common), ALDHs offer greatly improved selectivity.
Fusaric acid and analogues as Gram-negative bacterial quorum sensing inhibitors
Tung, Truong Thanh,Jakobsen, Tim Holm,Dao, Trong Tuan,Fuglsang, Anja Thoe,Givskov, Michael,Christensen, S?ren Br?gger,Nielsen, John
supporting information, p. 1011 - 1020 (2016/12/30)
Taking advantage of microwave-assisted synthesis, efficient and expedite procedures for preparation of a library of fusaric acid and 39 analogues are reported. The fusaric acid analogues were tested in cell-based screening assays for inhibition of the las and rhl quorum sensing system in Pseudomonas aeruginosa and the lux quorum sensing system in Vibrio fischeri. Eight of the 40 compounds in the library including fusaric acid inhibited lux quorum sensing and one compound inhibited activity of the las quorum sensing system. To our delight, none of the compounds showed growth inhibitory effects in the tested concentration ranges.
Discovery of biphenyl-aryl ureas as novel VEGFR-2 inhibitors. Part 4: Exploration of diverse hinge-binding fragments
Su, Ping,Wang, Jinfeng,Shi, Yaling,Pan, Xiaoyan,Shao, Ruili,Zhang, Jie
, p. 3228 - 3236 (2015/08/03)
Abstract VEGFR-2 plays an essential role in angiogenesis and is an important target for cancer therapy. A series of biphenyl-aryl ureas were synthesized and evaluated as novel VEGFR-2 inhibitors. The pyridine, methylamine carbonyl pyridine and pivaloyl amide pyridine were introduced as novel hinge binding fragment. The majority of title compounds displayed potent VEGFR-2 inhibition. In particular, L1, L9, W14 and W15 exhibited significant enzymatic inhibitory activity with IC50 values of 0.36 nM, 0.22 nM, 0.15 nM and 0.14 nM. Compounds L1, L9 and W15 displayed potent antiproliferative activity against A549 and SMMC-7721 cells. SAR study suggested that incorporation of 3-trifluoromethyl and methylamine carbonyl on terminal pyridine could improve VEGFR-2 inhibitory activity. Molecular docking illustrated that urea moiety formed two critical hydrogen bonds with the DFG residues of VEGFR-2. The results indicated that these biphenyl-aryl ureas could serve as promising lead compounds for further optimization.
SUBSTITUTED PYRAZOLE ANALOGUES AS RAR ANTAGONISTS
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Page/Page column 21, (2013/05/22)
The present invention provides compounds of Formula I or a pharmaceutical salt thereof; methods of treating osteoarthritis and the pain associated with osteoarthritis using the compounds; and processes for preparing the compounds.
SUBSTITUTED HETEROAROMATIC PYRAZOLE-CONTAINING CARBOXAMIDE AND UREA DERIVATIVES AS VANILLOID RECEPTOR LIGANDS
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Page/Page column 149; 150, (2013/03/26)
The invention relates to substituted heteroaromatic pyrazole-containing carboxamide and urea derivatives as vanilloid receptor ligands, to pharmaceutical compositions containing these compounds and also to these compounds for use in the treatment and/or prophylaxis of pain and further diseases and/or disorders.
Substituted Heteroaromatic Pyrazole-Containing Carboxamide and Urea Compounds as Vanilloid Receptor Ligands
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Paragraph 0824, (2013/03/26)
Substituted heteroaromatic pyrazole-containing carboxamide and urea compounds as vanilloid receptor ligands, pharmaceutical compositions containing these compounds and also to a method of using these compounds for treating and/or inhibiting pain and further diseases and/or disorders.
DEPROTECTION OF BOC-PROTECTED COMPOUNDS
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Page/Page column 2, (2010/12/29)
Organic compounds having t-butyl ester or BOC carbonate protecting groups are effectively deprotected by heating in a fluorinated alcohol solution.
A novel practical cleavage of tert-butyl esters and carbonates using fluorinated alcohols
Choy, Jason,Jaime-Figueroa, Saul,Lara-Jaime, Teresa
experimental part, p. 2244 - 2246 (2010/05/18)
Thermolytic cleavage of t-butyl esters and t-butyl carbonates was accomplished using TFE (2,2,2-trifluoroethanol) or HFIP (hexafluoroisopropanol) as solvent. Thus, a practical method to cleanly convert t-butyl esters and carbonates into the corresponding carboxylic acids, decarboxylated products, or alcohols in nearly quantitative yields was developed. The product is recovered by a simple solvent evaporation. The practicality of this methodology was demonstrated on alkyl, aryl, and heteroaromatic esters.
