55865-51-5Relevant academic research and scientific papers
6H-THIENO[2,3-E][1,2,4]TRIAZOLO[3,4-C][1,2,4]TRIAZEPINE DERIVATIVE
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, (2020/05/07)
The 6H-thieno[2,3-e][1,2,4]triazolo[3,4-c][1,2,4]triazepine derivatives or salts thereof of the present invention have BRD4 inhibitory activity, and thus, they are useful as medicaments, in particular, as prophylaxis and/or therapeutic agents for diseases associated with BRD4.
An efficient synthesis of 2-aminothiophenes via the gewald reaction catalyzed by an N-methylpiperazine-functionalized polyacrylonitrile fiber
Ma, Lichao,Yuan, Liwei,Xu, Changzhu,Li, Guowei,Tao, Minli,Zhang, Wenqin
, p. 45 - 52 (2013/03/13)
A new N-methylpiperazine-functionalized polyacrylonitrile fiber has been developed to catalyze the Gewald reaction between 2,5-dihydroxy-1,4-dithiane and activated nitriles to afford 3-substituted 2-aminothiophenes in good to excellent yields (65-91%). Low catalyst loading (8.0 mol%), simple procedure, high yields, excellent recyclability, and reusability (up to 10 times with minimal loss of catalytic activity) are attractive features of this fiber catalyst. Georg Thieme Verlag Stuttgart · New York.
Effects of conformational restriction of 2-amino-3-benzoylthiophenes on A1 adenosine receptor modulation
Aurelio, Luigi,Valant, Celine,Flynn, Bernard L.,Sexton, Patrick M.,White, Jonathan M.,Christopoulos, Arthur,Scammells, Peter J.
experimental part, p. 6550 - 6559 (2010/11/17)
2-Amino-3-benzoylthiophenes (2A3BTs) have been widely reported to act as allosteric enhancers (AEs) at the A1 adenosine receptor (A 1AR). Herein we describe the synthesis of a series of 1-aminoindeno[1,2-c]thiophen-8-ones and a series of (2-aminoindeno[2,1-b] thiophen-3-yl)(phenyl)methanones as conformationally rigid analogues of the 2A3BTs. These compounds were screened using a functional assay of A 1AR-mediated phosphorylation of extracellular signal-regulated kinases 1 and 2 (ERK1/2) in intact Chinese hamster ovary (CHO) cells to identify both potential agonistic effects as well as the ability to allosterically modulate the activity of the orthosteric agonist, N6-(R- phenylisopropyl)adenosine (R-PIA). All of the 1-aminoindeno[1,2-c]thiophen-8- ones (14a-c and 17a-f) proved either to be inactive or behaved as antagonists in the functional assay. However, the (2-aminoindeno[2,1-b]thiophen-3-yl)(phenyl) methanones with para-chloro substitution (compounds 25b, 25d, and 25f) did significantly augment the R-PIA response, indicating a positive allosteric effect.
2-Amino-3-aroyl-4,5-alkylthiophenes: Agonist allosteric enhancers at human a1 adenosine receptors
Tranberg, C. Elisabet,Zickgraf, Andrea,Giunta, Brian N.,Luetjens, Henning,Figler, Heidi,Murphree, Lauren J.,Falke, Ruediger,Fleischer, Holger,Linden, Joel,Scammells, Peter J.,Olsson, Ray A.
, p. 382 - 389 (2007/10/03)
2-Amino-3-benzoylthiophenes are allosteric enhancers (AE) of agonist activity at the A1 adenosine receptor. The present report describes syntheses and assays of the AE activity at the human A1AR (hA1AR) of a panel of compounds consisting of nine 2-amino-3-aroylthiophenes (3a-i), eight 2-amino-3-benzoyl-4,5-dimethylthiophenes (12a-h), three 3-aroyl-2-carboxy-4,5-dimethylthiophenes (15a-c), 10 2-amino-3-benzoyl-5,6-dihydro-4H-cyclopenta[b]thiophenes (17a-j), 14 2-amino-3-benzoyl-4,5,6,7-tetrahydrobenzo[b]thiophenes (18a-n), and 15 2-amino-3-benzoyl-5,6,7,8-tetrahydro-4H-cyclohepta[b]thiophenes (19a-o). An in vitro assay employing the A1AR agonist [125I]ABA and membranes from CHO-K1 cells stably expressing the hA1AR measured, as an index of AE activity, the ability of a candidate AE to stabilize the agonist-A1AR-G protein ternary complex. Compounds 3a-i had little or no AE activity, and compounds 12a-h had only modest activity, evidence that AE activity depended absolutely on the presence of at least a methyl group at C-4 and C-5. Compounds 17a-c lacked AE activity, suggesting the 2-amino group is essential. Polymethylene bridges linked thiophene C-4 and C-5 of compounds 17a-j, 18a-n, and 19a-o. AE activity increased with the size of the -(CH2)n- bridge, n = 3 1AR contains an allosteric binding site able to accommodate 3-aroyl substituents that are bulky and/or hydrophobic but not necessarily planar. A second region in the allosteric binding site interacts constructively with alkyl substituents at thiophene C-4 and/or C-5.
Synthesis and biological effects of a new series of 2-amino-3-benzoylthiophenes as allosteric enhancers of A1-adenosine receptor
Baraldi, Pier Giovanni,Zaid, Abdel Naser,Lampronti, Ilaria,Fruttarolo, Francesca,Pavani, Maria Giovanna,Tabrizi, Mojgan Aghazadhe,Shryock, John C.,Leung, Edward,Romagnoli, Romeo
, p. 1953 - 1957 (2007/10/03)
New derivatives of PD 81,723, an allosteric enhancer of agonist binding to the A1-adenosine receptor, have been synthesized and evaluated in an intact cell assay. Compounds 3a, 3o and 3p appeared to be more potent than PD 81,723 and at a concentration of 0.1 μM caused significant reductions of cAMP content of CHO cells expressing the human A1-adenosine receptor. Compounds 4e and 4o appeared to be allosteric enhancers at a low concentration and antagonists at a higher concentration, whereas compounds 3c, 3g, 3s and 4l appeared to be weak antagonists that are also allosteric enhancers at the higher concentration of 10 μM. (C) 2000 Elsevier Science Ltd.
