- Identification of potent α-amylase inhibitors via dynamic combinatorial chemistry
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In this study, we report for the first time the discovery of potent α-amylase inhibitors using principle of dynamic combinatorial chemistry. The best compound identified exhibited not only high inhibitory efficiency but also low cytotoxicity. The binding mode and possible mechanism are determined in the subsequent kinetic and molecular docking studies.
- Hu, Lei,Wu, Yao,Zhao, Shuang
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- Chromone and donepezil hybrids as new multipotent cholinesterase and monoamine oxidase inhibitors for the potential treatment of Alzheimer's disease
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A series of chromone and donepezil hybrids were designed, synthesized, and evaluated as multipotent cholinesterase (ChE) and monoamine oxidase (MAO) inhibitors for the potential therapy of Alzheimer's disease (AD). In vitro studies showed that the great majority of these compounds exhibited potent inhibitory activity toward BuChE and AChE and clearly selective inhibition for hMAO-B. In particular, compound 5c presented the most balanced potential for ChE inhibition (BuChE: IC50 = 5.24 μM; AChE: IC50 = 0.37 μM) and hMAO-B selectivity (IC50 = 0.272 μM, SI = 247). Molecular modeling and kinetic studies suggested that 5c was a mixed-type inhibitor, binding simultaneously to peripheral and active sites of AChE. It was also a competitive inhibitor, which occupied the substrate and entrance cavities of MAO-B. Moreover, compound 5c could penetrate the blood-brain barrier (BBB) and showed low toxicity to rat pheochromocytoma (PC12) cells. Altogether, these results indicated that compound 5c might be a hopeful multitarget drug candidate with possible impact on Alzheimer's disease therapy.
- Huang, Ming,Jiang, Neng,Kong, Ling-Yi,Lan, Jin-Shuai,Wang, Xiao-Bing,Yin, Fu-Cheng
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p. 225 - 233
(2020/04/22)
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- One pot and metal-free approach to 3-(2-Hydroxybenzoyl)-1-aza-anthraquinones
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Herein, a direct strategy to synthesize 3-(2-hydroxybenzoyl)-1-aza-anthraquinones with excellent efficiency,mild conditions, and benign functional group compatibilitywas reported. Avariety of 3-formylchromone compounds were employed as compatible substrates and this protocol gave the 3-(2-hydroxybenzoyl)-1-aza-anthraquinone derivatives in good to excellent yields without inert gas and expensive transition metal catalysts. Some compounds displayed good anti-proliferative activities.
- Yuan, Jiaqi,He, Qian,Song, Shanshan,Zhang, Xiaofei,Miao, Zehong,Yang, Chunhao
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supporting information
(2019/08/30)
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- Design, synthesis, and biological activity of substituted 2-amino-5-oxo-5H-chromeno[2,3-b]pyridine-3-carboxylic acid derivatives as inhibitors of the inflammatory kinases TBK1 and IKKε for the treatment of obesity
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The non-canonical IκB kinases TANK-binding kinase 1 (TBK1) and inhibitor of nuclear factor kappa-B kinase ε (IKKε) play a key role in insulin-independent pathways that promote energy storage and block adaptive energy expenditure during obesity. Utilizing docking calculations and the x-ray structure of TBK1 bound to amlexanox, an inhibitor of these kinases with modest potency, a series of analogues was synthesized to develop a structure activity relationship (SAR) around the A- and C-rings of the core scaffold. A strategy was developed wherein R7 and R8 A-ring substituents were incorporated late in the synthetic sequence by utilizing palladium-catalyzed cross-coupling reactions on appropriate bromo precursors. Analogues display IC50 values as low as 210 nM and reveal A-ring substituents that enhance selectivity toward either kinase. In cell assays, selected analogues display enhanced phosphorylation of p38 or TBK1 and elicited IL-6 secretion in 3T3-L1 adipocytes better than amlexanox. An analogue bearing a R7 cyclohexyl modification demonstrated robust IL-6 production in 3T3-L1 cells as well as a phosphorylation marker of efficacy and was tested in obese mice where it promoted serum IL-6 response, weight loss, and insulin sensitizing effects comparable to amlexanox. These studies provide impetus to expand the SAR around the amlexanox core toward uncovering analogues with development potential.
- Beyett, Tyler S.,Gan, Xinmin,Reilly, Shannon M.,Gomez, Andrew V.,Chang, Louise,Tesmer, John J.G.,Saltiel, Alan R.,Showalter, Hollis D.
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p. 5443 - 5461
(2018/10/04)
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- Direct construction of xanthene and benzophenone derivatives via Br?nsted acid controlled Diels-Alder reaction of 3-vinylchromones and arynes
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A Br?nsted acid controlled Diels-Alder reaction of 3-vinylchromones with arynes has been developed. By employing different kinds and amounts of acid, 9-aryl-9H-xanthen-9-ols or ortho-hydroxybenzophenones could be controllably furnished in good yields in an atom- and step-economic manner.
- Huang, Xu-Jiao,Tao, Yuan,Li, Yue-Kun,Wu, Xin-Yan,Sha, Feng
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supporting information
p. 8565 - 8577
(2016/12/09)
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