137736-06-2Relevant academic research and scientific papers
Computational study and synthesis of a new class of anticonvulsants with 6 Hz psychomotor seizure test activity: 2-(1,3-benzodioxol-5-yloxy)-N'-[substituted]-acetohydrazides
Kumar, Praveen,Tripathi, Laxmi
, p. 1175 - 1193 (2021/12/21)
Background: About 50 million epileptic cases worldwide and 12 million in India are re-ported. Currently, available drugs yield adequate control of seizure in 60-70% of patients and show many toxic effects. These actualities provoked the search for novel, more efficacious and safer anti-convulsants. Objective: The concatenation of 2-(1,3-benzodioxol-5-yloxy)-N'-[substituted]-acetohydrazides SA 1-10 was designed by molecular hybridization, optimized by computational study and synthesized with the objective of obtaining a prototype of potent anticonvulsant molecules especially active against partial seizures. Methods: Computational study was performed to calculate the pharmacophoric design, projection of the pharmacokinetic parameters and docking scores of the titled compounds with molecular targets of epilepsy. The anticonvulsant activity was ascertained by 6 Hz psychomotor seizure test. Minimal motor impairment showing neurotoxicity was assessed using the Rotarod test. Results: Titled compounds possessed the indispensable elements of pharmacophore and displayed good binding affinity with molecular targets of epilepsy, such as GABA (A) alpha-1 & delta receptor, glutamate receptor, Na+/H+ exchanger and GABA-aminotransferase in docking studies. The most potent compound of the concatenation was 2-(1,3-benzodioxol-5-yloxy)-N'-[4-(4-chlorophenoxy)benzylidene]-acetohydrazide SA 4, showing 100% protection at four different time points with ED50 value 146.8 mg/kg at a TPE of 1 h in mice. Conclusion: The protection shown in 6 Hz test is implicated as the compound's ability to control partial seizures. Thus, the titled compounds can be considered as potential prototype candidates for antiepileptic therapy against partial seizures.
Discovery of highly potent and selective influenza virus neuraminidase inhibitors targeting 150-cavity
Jia, Ruifang,Zhang, Jian,Bertagnin, Chiara,Cherukupalli, Srinivasulu,Ai, Wei,Ding, Xiao,Li, Zhuo,Zhang, Jiwei,Ju, Han,Ma, Xiuli,Loregian, Arianna,Huang, Bing,Zhan, Peng,Liu, Xinyong
, (2021/01/05)
Encouraged by our earlier discovery of N1-selective inhibitors, the 150-cavity of influenza virus neuraminidases (NAs) could be further exploited to yield more potent oseltamivir derivatives. Herein, we report the design, synthesis and biological evaluation of a series of novel oseltamivir derivatives via the structural modifications at C5–NH2 of oseltamivir targeting 150-cavity. Among them, compound 5c bearing 4-(3-methoxybenzyloxy)benzyl group exhibited the most potent activity, which was lower or modestly improved activities than oseltamivir carboxylate (OSC) against N1 (H1N1), N1 (H5N1) and N1 (H5N1–H274Y). Specifically, there was 30-fold loss of activity against the wild-type strain H1N1. However, 5c displayed 4.85-fold more potent activity than OSC against H5N1–H274Y NA. Also, 5c demonstrated low cytotoxicity in vitro and no acute toxicity in mice. Molecular docking studies provided insights into the high potency of 5c against N1 and N1–H274Y mutant NAs. Besides, the in silico prediction of physicochemical properties and CYP enzymatic inhibitory ability of representative compounds were conducted to evaluate their drug-like properties.
HETEROCYCLIC COMPOUNDS AS MUTANT IDH INHIBITORS
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Paragraph 0394-0395, (2020/07/16)
The present disclosure relates generally to compounds useful in treatment of conditions associated with mutant isocitrate dehydrogenase (mt-IDH), particularly mutant IDH1 enzymes. Specifically, the present invention discloses compound of formula (IA), which exhibits inhibitory activity against mutant IDH1 enzymes. Method of treating conditions associated with excessive activity of mutant IDH1 enzymes with such compound is disclosed. Uses thereof, pharmaceutical composition, and kits are also disclosed.
Pyrimidine onium compound and application thereof
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Paragraph 0231-0234, (2019/10/23)
The invention relates to a pyrimidine onium compound, nitride oxides, salt of the nitride oxides and a composition comprising the compound. The invention further relates to an application of the compound to plant pest control.
Natural Product Neopeltolide as a Cytochrome bc1 Complex Inhibitor: Mechanism of Action and Structural Modification
Zhu, Xiao-Lei,Zhang, Rui,Wu, Qiong-You,Song, Yong-Jun,Wang, Yu-Xia,Yang, Jing-Fang,Yang, Guang-Fu
, (2019/03/19)
The marine natural product neopeltolide was isolated from a deep-water sponge specimen of the family Neopeltidae. Neopeltolide has been proven to be a new type of inhibitor of the cytochrome bc1 complex in the mitochondrial respiration chain. However, its detailed inhibition mechanism has remained unknown. In addition, neopeltolide is difficult to synthesize because of its very complex chemical structure. In the present work, the binding mode of neopeltolide was determined for the first time by integrating molecular docking, molecular dynamics simulations, and molecular mechanics Poisson-Boltzmann surface area calculations, which showed that neopeltolide is a Qo site inhibitor of the bc1 complex. Then, according to guidance via inhibitor-protein interaction analysis, structural modification was carried out with the aim to simplify the chemical structure of neopeltolide, leading to the synthesis of a series of new neopeltolide derivatives with much simpler chemical structures. The calculated binding energies (ΔGcal) of the newly synthesized analogues correlated very well (R2 = 0.90) with their experimental binding free energies (ΔGexp), which confirmed that the computational protocol was reliable. Compound 45, bearing a diphenyl ether fragment, was successfully designed and synthesized as the most potent candidate (IC50 = 12 nM) against porcine succinate cytochrome c reductase. The molecular modeling results indicate that compound 45 formed a π-π interaction with Phe274 and two hydrogen bonds with Glu271 and His161. The present work provides a new starting point for future fungicide discovery to overcome the resistance that the existing bc1 complex inhibitors are facing.
Synthesis and biological evaluation of new thiosemicarbazone derivative schiff bases as monoamine oxidase inhibitory agents
?avu?o?lu, Betül Kaya,Sa?l?k, Beg m Nurpelin,Sa?l?k, Begüm Nurpelin,Osmaniye, Derya,Levent, Serkan,Evik, Ulviye Acar,Karaduman, Abdullah Burak,Zkay, Yusuf,Kaplanc?kl?, Zafer As?m
, (2018/01/26)
Twenty-six novel thiosemicarbazone derivative B1–B26 were synthesized via condensation reactions between the corresponding thiosemicarbazides and aldehydes. The chemical characterization of the compounds was carried out by infrared (IR), mass (MS), proton and carbon nuclear magnetic resonance (1H- and 13C-NMR) spectroscopic analyses. The compounds were investigated for their monoamine oxidase A (MAO-A) and monoamine oxidase B (MAO-B) inhibitory activity and most of them were more potent against MAO-A enzyme when compared with MAO-B enzyme. N-Cyclohexyl-2-[4-[(4-chlorophenyl)thio]benzylidene]hydrazine-1-carbothioamide (B24) was the most active compound against MAO-A. The enzyme kinetics study revealed that compound B24 has a reversible and competitive mode of binding. Interaction modes between compound B24 and MAO-A were clarified by docking studies. In addition, the favourable absorption, distribution, metabolism, and excretion (ADME) properties and non-toxic nature of compound B24 make this compound a promising MAO-A inhibitor.
Highly efficient heterogeneous copper-catalysed O-arylation of phenols by nitroarenes leading to diaryl ethers
Du, Yingying,Yao, Fang,Tuo, Yuxin,Cai, Mingzhong
, p. 725 - 729 (2018/01/08)
The heterogeneous O-arylation of phenols by nitroarenes was achieved in DMF at 100 °C by using an MCM-41-immobilised bidentate nitrogen copper(II) complex [MCM-41-2N-Cu(OAc)2] as catalyst, yielding a variety of unsymmetrical diaryl ethers in good to excellent yields. This heterogeneous copper catalyst can be easily prepared by a simple procedure from commercially readily available and inexpensive reagents, recovered by filtration of the reaction solution and recycled at least seven times without significant loss of activity.
Synthesis of new hydrazone derivatives for MAO enzymes inhibitory activity
Can, Nafiz ?ncü,Can, Nafiz nc,Osmaniye, Derya,Levent, Serkan,Sa Sa?lik, Begüm Nurpelin,Inci, Beril,Ilgin, Sinem,?zkay, Yusuf,Kaplancikli, Zafer Asim
, (2017/08/29)
In the present work, 14 new 1-substituted-2-phenylhydrazone derivatives were synthesized to evaluate their inhibitory activity against hMAO enzymes. The structures of the newly synthesized hydrazones 2a–2n were characterized by IR,1H-NMR,1
Synthesis and Structure-Activity Relationships for Extended Side Chain Analogues of the Antitubercular Drug (6 S)-2-Nitro-6-{[4-(trifluoromethoxy)benzyl]oxy}-6,7-dihydro-5 H -imidazo[2,1- b ][1,3]oxazine (PA-824)
Palmer, Brian D.,Sutherland, Hamish S.,Blaser, Adrian,Kmentova, Iveta,Franzblau, Scott G.,Wan, Baojie,Wang, Yuehong,Ma, Zhenkun,Denny, William A.,Thompson, Andrew M.
supporting information, p. 3036 - 3059 (2015/04/27)
Novel extended side chain nitroimidazooxazine analogues featuring diverse linker groups between two aryl rings were studied as a potential strategy to improve solubility and oral activity against chronic infection by Mycobacterium tuberculosis. Both lipop
Augmentation of GABAergic neurotransmission by novel N-(substituted)-2-[4- (substituted)benzylidene]hydrazinecarbothioamides - A potential anticonvulsant approach
Tripathi, Laxmi,Kumar, Praveen
, p. 477 - 487 (2013/07/19)
New N-(substituted)-2-[4-(substituted)benzylidene]hydrazinecarbothioamides were designed, synthesized and evaluated for anticonvulsant activity and neurotoxicity. The anticonvulsant activity was established in three seizure models i.e. MES, scMET and 6 Hz model. The most active compound was N-(4-methoxyphenyl)-2-[4-(4-methylphenoxy) benzylidene]hydrazinecarbothioamide PT 30 which showed 100% protection in both MES and 6 Hz test. Compound PT 30 showed protection at three different time points in 6 Hz test at a dose of 100 mg/kg. Compound 2-[4-(4-Chlorophenoxy)benzylidene]-N-cyclohexylhydrazine carbothioamide PT 4 was also found to be active in both MES and 6 Hz test. Titled compounds exhibited good binding properties with epilepsy molecular targets GABA (A) delta and GABA (A) alpha-1 receptors, in LGA based flexible docking studies. Compounds PT 30 and PT 4 were found to elevate γ-aminobutyric acid (GABA) levels in the midbrain and medulla oblongata regions of rat brain. A computational study was carried out for calculation of pharmacophore pattern and prediction of pharmacokinetic properties.
