Synthesis, antibacterial evaluation, and docking studies of azaisoflavone analogues generated by palladium-catalyzed cross coupling
摘要:
Palladium-catalyzed, cross-coupling reaction of N-methyl-3-iodo-4-quinolone with boronic acids or N-methyliminodi-acetic acid boronates to obtain azaisoflavone derivatives was investigated through conventional Suzuki Miyuara coupling or by slow release strategy. It has been observed that a slow release approach was a highly successful. In addition, a series of novel azaisoflavones containing alkynyl group were synthesized via Sonogashira reaction. The antibacterial activities of the all synthesized compounds were screened against series of bacterial strains. Furthermore, a molecular docking study was carried out for the most active compounds using Leadit 2.1.8 docking software, and the results were in good agreement with the experimental data. The details of synthetic methods, spectroscopic data, and biological results are reported.[GRAPHICS]
Synthesis of (E)-3-Styrylquinolin-4(1H)-ones in Water by Ohmic Heating: a Comparison with Other Methodologies
作者:Joana Pinto、Vera L. M. Silva、Luis M. N. B. F. Santos、Artur M. S. Silva
DOI:10.1002/ejoc.201600150
日期:2016.6
Ohmicheating offers a very efficient way to perform organic reactions in aqueous media. Potentially bioactive (E)-3-styrylquinolin-4(1H)-ones were synthesized by the Heck reaction of 3-iodo-1-methylquinolin-4(1H)-one with styrenes in water and with ohmicheating. Pd(OAc)2 was used as catalyst, and tetrabutylammonium bromide was used as phase-transfer catalyst in the presence of an inorganic base.
Reactivity of 3-Iodo-4-quinolones in Heck Reactions: Synthesis of Novel (E)-3-Styryl-4-quinolones
作者:Artur Silva、Andreia Almeida、José Cavaleiro
DOI:10.1055/s-0029-1219175
日期:2010.2
A new and efficient route for the synthesis of (E)-N-methyl-3-styryl-4-quinolones is described. It involves the Heck reaction of N-methyl-3-iodo-4-quinolone, which is obtained by consecutive 3-iodination and NH-methylation of the unsubstituted 4-quinolone, with styrene derivatives. It is demonstrated that such a procedure is only efficient when the 3-iodo-4-quinolone has an N-protecting group. In some cases the branched regioisomers N-methyl-3-(1-phenylethenyl)-4-quinolones were also obtained as byproducts.
New Synthesis of (Z)- and (E)-3-Styryl-4-quinolones
作者:Artur Silva、Raquel Seixas、José Cavaleiro
DOI:10.1055/s-0030-1258042
日期:2010.9
efficient route for the synthesis of (Z)- and (E)-3-styryl-4-quinolones is described. Wittig reaction of 4-(chlo- roquinoline- and quinolone)-3-carbaldehydes with benzylic ylides is the key transformation for this synthetic route. The (Z)-1-methyl- 3-styryl-4-quinolone is obtained with high diastereoselectivity from the reaction of 1-methyl-4-quinolone-3-carbaldehyde; while (E)-3- styryl-4-quinolone
An experimental NMR and computational study of 4-quinolones and related compounds
作者:Raquel S. G. R. Seixas、Artur M. S. Silva、Ibon Alkorta、José Elguero
DOI:10.1007/s00706-011-0473-y
日期:2011.7
AbstractWe report the synthesis and structural study of eight compounds, either quinolin-4(1H)-ones or quinolines. Tautomerism as well as (E) → (Z) and rotational isomerism were studied both experimentally (1H and 13C NMR) and theoretically [B3LYP/6-311++G(d,p)]. Graphical Abstract
摘要我们报告了八个化合物,喹啉4(1 H)一或喹啉的合成和结构研究。通过实验(1 H和13 C NMR)和理论上[B3LYP / 6-311 ++ G(d,p)]研究互变异构以及(E)→(Z)和旋转异构现象。 图形概要