514182-79-7Relevant academic research and scientific papers
Optimization of diarylpentadienones as chemotherapeutics for prostate cancer
Patanapongpibul, Manee,Zhang, Changde,Chen, Guanglin,Guo, Shanchun,Zhang, Qiang,Zheng, Shilong,Wang, Guangdi,Chen, Qiao-Hong
, p. 4751 - 4760 (2018)
Our earlier studies indicate that (1E,4E)-1,5-bis(1-alkyl-1H-imidazol-2-yl)penta-1,4-diene-3-ones and (1E,4E)-1,5-bis(1-alkyl-1H-benzo[d]imidazol-2-yl)penta-1,4-diene-3-ones exhibit up to 121-fold greater antiproliferative potency than curcumin in human p
C?N Cross-Coupling Reactions Under Mild Conditions Using Singlet Di-Radical Nickel(II)-Complexes as Catalyst: N-Arylation and Quinazoline Synthesis
Sikari, Rina,Sinha, Suman,Chakraborty, Gargi,Das, Siuli,van Leest, Nicolaas Petrus,Paul, Nanda D.
supporting information, p. 4342 - 4353 (2019/08/21)
Herein we report a cost-effective synthetic approach for C?N cross-coupling reactions of a broad array of nitrogen nucleophiles and aryl halides under mild conditions. These reactions are catalyzed by an inexpensive, air-stable, earth-abundant and easy-to-prepare singlet di-radical nickel(II)-catalyst containing two antiferromagnetically coupled single-electron oxidized diiminosemiquinonato type ligands. This protocol provides an alternative method for C?N cross-coupling reactions avoiding nickel(0)/nickel(II) or nickel(I)/nickel(III) redox processes via cooperative participation of metal and ligand-centered redox events. Besides a wide range of N-arylation reactions, by judicious choice of aryl halides and nitrogen nucleophiles the synthesis of a variety of polysubstituted quinazolines has been achieved in moderate to good yields under relatively mild reaction conditions. Our catalyst has been found to be almost equally effective in quinazoline synthesis via C?N cross-coupling of (i) 2-bromobenzylamine with benzamide, and (ii) 2-bromobenzylbromide with amidine. Control experiments and DFT studies were performed to improve the understanding of the cooperative participation of ligand and metal (nickel)-centered redox events during oxidative addition/reductive elimination processes of the catalytic cycle and to shed light on the plausible mechanistic pathway of the C?N cross-coupling reactions. (Figure presented.).
Structure-based optimization of potent 4- and 6-azaindole-3-carboxamides as renin inhibitors
Scheiper, Bodo,Matter, Hans,Steinhagen, Henning,B?cskei, Zsolt,Fleury, Valérie,McCort, Gary
scheme or table, p. 5480 - 5486 (2011/10/09)
The control of hypertension and associated cardiovascular risk factors is possible by selective inhibition of the aspartyl protease renin due to its unique position in the renin-angiotensin system. Starting from a previously disclosed series of potent and nonchiral indole-3-carboxamides, we further explored this motif by structure-based drug design guided by X-ray crystallography in combination with efficient parallel synthesis. This resulted in the discovery of 4- or 6-azaindole derivatives with remarkable potency for renin inhibition. The best compound from these series showed an IC50 value of 1.3 nM.
CYCLIC AZAINDOLE-3-CARBOXAMIDES, THEIR PREPARATION AND THEIR USE AS PHARMACEUTICALS
-
Page/Page column 63-64, (2009/09/05)
The present invention relates to cyclic azaindole-3-carboxamides of the formula (I) wherein A, R, R10, R20, R30, R40, Y1, Y2, Y3, Y4, n, p and q have the meanings indi
