865611-14-9Relevant academic research and scientific papers
Synthesis and biological evaluation of direct thrombin inhibitors bearing 4-(piperidin-1-yl)pyridine at the P1 position with potent anticoagulant activity
De Candia, Modesto,Fiorella, Filomena,Lopopolo, Gianfranco,Carotti, Andrea,Romano, Maria Rosaria,Lograno, Marcello Diego,Martel, Sophie,Carrupt, Pierre-Alain,Belviso, Benny D.,Caliandro, Rocco,Altomare, Cosimo
, p. 8696 - 8711 (2013/12/04)
The design and synthesis of a new class of nonpeptide direct thrombin inhibitors, built on the structure of 1-(pyridin-4-yl)piperidine-4-carboxamide, are described. Starting from a strongly basic 1-amidinopiperidine derivative (6) showing poor thrombin (fIIa) and factor Xa (fXa) inhibition activities, anti-fIIa activity and artificial membrane permeability were considerably improved by optimizing the basic P1 and the X-substituted phenyl P4 binding moieties. Structure-activity relationship studies, usefully complemented with molecular modeling results, led us to identify compound 13b, which showed excellent fIIa inhibition (Ki = 6 nM), weak anti-Xa activity (K i = 5.64 μM), and remarkable selectivity over other serine proteases (e.g., trypsin). Compound 13b showed in vitro anticoagulant activity in the low micromolar range and significant membrane permeability. In mice (ex vivo), 13b demonstrated anticoagulant effects at 2 h after oral dosing (100 mg·kg-1), with a significant 43% prolongation of the activated partial thromboplastin time (aPTT), over controls (P 0.05).
Design, synthesis, and anticonvulsant activity evaluation of 4-(3-Alkoxy-phenyl)-2,4-dihydro-[1,2,4]triazol-3-ones
Shu, Bing,Zheng, Yan,Wang, Shi-Ben,Deng, Xian-Qing,Quan, Zhe-Shan
, p. 127 - 133 (2013/04/10)
A series of 4-(3-alkoxy-phenyl)-2,4-dihydro-[1,2,4]triazol-3-ones were synthesized using the appropriate synthetic route and evaluated experimentally in the maximal electroshock test; their neurotoxicities were evaluated by the rotarod neurotoxicity test. The structures of these compounds were confirmed by IR, MS, 1H-NMR, and elementary analysis. All target compounds exhibited anticonvulsant activity to varying degrees in the maximal electroshock test. 4-(3-Benzyloxy-phenyl)-2,4-dihydro-[1,2,4]triazol-3-one (4i) was the most promising compound with an ED50 value of 30.5 mg/kg and a protective index (PI) of 18.63, showing a higher safety than the standard carbamazepine (PI = 6.45). In addition, the potency of compound 4i against seizures induced by pentylenetetrazole and 3-mercaptopropionic acid suggested its broad-spectrum activity, and the mechanisms of action including inhibition of voltage-gated ion channels and modulation of GABAergic activity might be involved in its anticonvulsant activity. Copyright
Synthesis of novel 5-substituted isoxazole-3-carboxamide derivatives and cytotoxicity studies on lung cancer cell line
Veeraswamy,Kurumurthy,Santhosh Kumar,Sambasiva Rao,Thelakkat, Kavya,Kotamraju, Srigiridhar,Narsaiah
, p. 1369 - 1375 (2012/11/13)
A series of novel 5-substituted isoxazole-3-carboxamide derivatives 6 have been prepared by coupling of 5-substituted isoxazole-3-carboxylic acids 3 with substituted-3-benzyloxyaniline 5 using DCC/HOBT as coupling agent. The products 6 have been evaluated for cytotoxicity on A549 lung cancer cell line and compounds 6a, 6b, 6e, 6j are found to show moderate proliferative activity and low cytotoxicity.
Synthesis and anti-proliferative activity of substituted- anilinoquinazolines and its relation to EGFR inhibition
El Ella,Saleh,Hassan,Hamdy,El-Araby,Abouzid
, p. 360 - 366 (2012/10/29)
4-Anilinoquinazoline is a privileged scaffold in developing small molecule inhibitors of tyrosine kinases (TK) especially epidermal growth factor receptor (EGFR). 2 series belonging to 3'-substituted-4-anilinoquinazoline scaffold were synthesized and screened in vitro on isolated and a breast cancer cell line. The research aims at exploring the activity of compounds having diverse substituents at 3' position of the aniline moiety. Generally, the meta-substituted-anilinoquinazolines exhibited significant inhibitory activity against isolated enzyme as well as MCF-7 cancer cell line. For instance, compound 10b inhibited >99% of EGFR activities at 10 M concentration. 6 of the tested compounds exhibited range of anti-proliferative activity below 10 M potency. In particular, compounds 6e and 10b displayed the highest activity among the tested compounds with IC50 values equal to 8.6 and 4.84 M, respectively. Structure-based tools were utilized to rationalize EGFR-TK binding of compound 10b since it is the most active compound in the enzyme inhibition test. Georg Thieme Verlag KG Stuttgart.New York.
