- Synthesis of Novel Aryloxyethylamine Derivatives and Evaluation of Their in Vitro and in Vivo Neuroprotective Activities
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A series of aryloxyethylamine derivatives were designed, synthesized and evaluated for their biological activity. Their structures were confirmed by 1H-NMR, 13C-NMR, FT-IR and HR-ESI-MS. The preliminary screening of neuroprotection of compounds in vitro was detected by MTT, and the anti-ischemic activity in vivo was tested using bilateral common carotid artery occlusion in mice. Most of these compounds showed potential neuroprotective effects against the glutamate-induced cell death in differentiated rat pheochromocytoma cells (PC12 cells), especially for (4-fluorophenyl){1-[2-(4-methoxyphenoxy)ethyl]piperidin-4-yl}methanone, {1-[2-(4-methoxyphenoxy)ethyl]piperidin-4-yl}(4-methoxyphenyl)methanone, (4-bromophenyl){1-[2-(4-methoxyphenoxy)ethyl]piperidin-4-yl}methanone, {1-[2-(4-chlorophenoxy)ethyl]piperidin-4-yl}(4-chlorophenyl)methanone, (4-chlorophenyl)(1-{2-[(naphthalen-2-yl)oxy]ethyl}piperidin-4-yl)methanone, (4-chlorophenyl){1-[2-(4-methoxyphenoxy)ethyl]piperidin-4-yl}methanone and {1-[2-(4-bromophenoxy)ethyl]piperidin-4-yl}(4-chlorophenyl)methanone, which exhibited potent protection of PC12 cells at three doses (0.1, 1.0, 10 μM). Compounds (4-fluorophenyl){1-[2-(4-methoxyphenoxy)ethyl]piperidin-4-yl}methanone, (4-fluorophenyl){1-[2-(naphthalen-2-yloxy)ethyl]piperidin-4-yl}methanone, {1-[2-(4-methoxyphenoxy)ethyl]piperidin-4-yl}(4-methoxyphenyl)methanone and {1-[2-(4-chlorophenoxy)ethyl]piperidin-4-yl}(4-chlorophenyl)methanone possessed the significant prolongation of the survival time of mice subjected to acute cerebral ischemia and decreased the mortality rate at all five doses tested (200, 100, 50, 25, 12.5 mg/kg) and had significant neuroprotective activity. In addition, (4-fluorophenyl){1-[2-(4-methoxyphenoxy)ethyl]piperidin-4-yl}methanone, {1-[2-(4-methoxyphenoxy)ethyl]piperidin-4-yl}(4-methoxyphenyl)methanone and {1-[2-(4-chlorophenoxy)ethyl]piperidin-4-yl}(4-chlorophenyl)methanone possessed outstanding neuroprotection in vitro and in vivo. These compounds can be used as a promising neuroprotective agents for future development of new anti-ischemic stroke agents. Basic structure–activity relationships are also presented.
- Gao, Yarong,Qi, Changyong,Wu, Bin,Xu, Yi,Zhong, Yan
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- Structural and Functional Study of the Klebsiella pneumoniae VapBC Toxin-Antitoxin System, including the Development of an Inhibitor That Activates VapC
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Klebsiella pneumoniae is one of the most critical opportunistic pathogens. TA systems are promising drug targets because they are related to the survival of bacterial pathogens. However, structural information on TA systems in K. pneumoniae remains lacking; therefore, it is necessary to explore this information for the development of antibacterial agents. Here, we present the first crystal structure of the VapBC complex from K. pneumoniae at a resolution of 2.00 ?. We determined the toxin inhibitory mechanism of the VapB antitoxin through an Mg2+ switch, in which Mg2+ is displaced by R79 of VapB. This inhibitory mechanism of the active site is a novel finding and the first to be identified in a bacterial TA system. Furthermore, inhibitors, including peptides and small molecules, that activate the VapC toxin were discovered and investigated. These inhibitors can act as antimicrobial agents by disrupting the VapBC complex and activating VapC. Our comprehensive investigation of the K. pneumoniae VapBC system will help elucidate an unsolved conundrum in VapBC systems and develop potential antimicrobial agents.
- Kang, Sung-Min,Jin, Chenglong,Kim, Do-Hee,Lee, Yuno,Lee, Bong-Jin
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supporting information
p. 13669 - 13679
(2020/12/02)
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- Optimization of a Benzoylpiperidine Class Identifies a Highly Potent and Selective Reversible Monoacylglycerol Lipase (MAGL) Inhibitor
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Monoacylglycerol lipase (MAGL) is the enzyme degrading the endocannabinoid 2-arachidonoylglycerol, and it is involved in several physiological and pathological processes. The therapeutic potential of MAGL is linked to several diseases, including cancer. The development of MAGL inhibitors has been greatly limited by the side effects associated with the prolonged MAGL inactivation. Importantly, it could be preferable to use reversible MAGL inhibitors in vivo, but nowadays only few reversible compounds have been developed. In the present study, structural optimization of a previously developed class of MAGL inhibitors led to the identification of compound 23, which proved to be a very potent reversible MAGL inhibitor (IC50 = 80 nM), selective for MAGL over the other main components of the endocannabinoid system, endowed of a promising antiproliferative activity in a series of cancer cell lines and able to block MAGL both in cell-based as well as in vivo assays.
- Granchi, Carlotta,Lapillo, Margherita,Glasmacher, Sandra,Bononi, Giulia,Licari, Cristina,Poli, Giulio,El Boustani, Maguie,Caligiuri, Isabella,Rizzolio, Flavio,Gertsch, Jürg,Macchia, Marco,Minutolo, Filippo,Tuccinardi, Tiziano,Chicca, Andrea
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p. 1932 - 1958
(2019/02/26)
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- 1-aryloxy ethyl piperidine-4-yl benzophenone derivative as well as preparation method and application thereof
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The invention discloses a 1-aryloxy ethyl piperidine-4-yl benzophenone derivative as well as a preparation method and application thereof. The compound is a free alkali or salt with a compound of a formula (I) shown in the specification; the salt is one of hydrochloride, hydrobromide, sulfate, trifluoroacetate, tartrate, lactate or mesylate; in the formula, R1 independently represents H, halogen,alkyl, halogen-substituted alkyl, nitryl, amino, nitrile, hydroxyl, alkoxy, aryl alkoxy, heterocyclic alkoxy, aryl, substituted heterocyclic ring or substituted aryl; and R2 is independently selectedfrom H, halogen, alkyl, halogen substituted alkyl, nitryl, amino, nitrile, hydroxyl, alkoxy, aryl alkoxy, heterocyclic alkoxy, aryl, substituted heterocyclic ring or substituted aryl. The 1-aryloxy ethyl piperidine-4-yl benzophenone derivative is applied to preparation of medicines for treating cerebral arterial thrombosis.
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Paragraph 0061-0063
(2019/11/20)
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- Tankyrase inhibitor
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The invention belongs to the technical field of medicines and particularly relates to a tankyrase inhibitor represented by a general formula (I) shown in the description and pharmaceutically acceptable salts, esters, solvates or stereoisomers thereof, wherein R1, R2, R3, m, n, Z, L, Q, A, X1, X2 and Y are as defined in the description. The invention further relates to a preparation method for the compounds, pharmaceutical preparations and pharmaceutical compositions containing the compounds and application of the compound and the pharmaceutically acceptable salts, esters, solvates or stereoisomers thereof in preparation of drugs for treating and/or preventing tankyrase mediated cancers and related diseases.
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Paragraph 0227-0229
(2017/10/13)
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- Discovery of the disubstituted oxazole analogues as a novel class anti-tuberculotic agents against MDR- and XDR-MTB
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A high-throughput screening effort on 45,000 compounds resulted in the discovery of a disubstituted oxazole as a new structural class inhibitor of Mycobacterium tuberculosis (Mtb). In order to improve the activity and investigate the SAR of this scaffold, a series of disubstituted azole analogues have been designed and synthesized. The newly synthesized compounds 1a-y were evaluated for their in vitro anti-TB activity versus replicating, multi- and extensive drug resistant Mtb strains. All the compounds, except 1o, 1p and 1q, showed potent anti-TB activity with MIC of 1-64 mg/L. The test of broad spectrum panel revealed that this series are specific to Mtb. The cytotoxicity assessment indicated that the compounds were not cytotoxic against HEK 293 cells. The compounds could have a novel mechanism to anti-Mtb as they can inhibit drug sensitive and drug resistant Mtb.
- Li, Dongsheng,Gao, Nana,Zhu, Ningyu,Lin, Yuan,Li, Yan,Chen, Minghua,You, Xuefu,Lu, Yu,Wan, Kanglin,Jiang, Jian-Dong,Jiang, Wei,Si, Shuyi
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supporting information
p. 5178 - 5181
(2015/11/09)
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- Synthesis of novel 4(Diarylmethylene)piperidines
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An efficient sequence to the seven novel 4-(diarylmethylene)piperidines starting frotn the commercially available l-acetylpiperidine-4-carboxylic acid,is reported.
- Liu, Zong-Ying,Li, Zhuo-Rong,Jiang, Jian-Dong,Boykin, David W.
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experimental part
p. 401 - 405
(2010/08/22)
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- Subtype-selective NMDA receptor ligands and the use thereof
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The invention relates to subtype-selective NMDA receptor ligands and the use thereof for treating or preventing neuronal loss associated with stroke, ischemia, CNS trauma, hypoglycemia and surgery, as well as treating neuro-degenerative diseases including Alzheimer's disease, amyotrophic lateral sclerosis, Huntington's disease and Down's syndrome, treating or preventing the adverse consequences of the overstimulation of the excitatory amino acids, treating anxiety, psychosis, convulsions, aminoglycoside antibiotics-induced hearing loss, migraine headache, chronic pain, Parkinson's disease, glaucoma, CMV retinitis, urinary incontinence, opioid tolerance or withdrawal, and inducing anesthesia, as well as for enhancing cognition.
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