Synthesis of 4H-1,4-oxazines as transthyretin amyloid fibril inhibitors
作者:Weipeng Li、Xiaowei Duan、Hong Yan、Hongxing Xin
DOI:10.1039/c3ob40377g
日期:——
4-oxazines were designed as transthyretin (TTR) amyloidfibrilinhibitors based on an analysis of the interactions between known small molecule inhibitors and TTR by molecular docking. A series of 2,4,6-triaryl-4H-1,4-oxazines was synthesized by the cyclization of N,N-bis(phenacyl)anilines with POCl3 in pyridine. Inhibition of TTR amyloidfibril was evaluated by a fibril formation assay. The results
将4 H -1,4-恶嗪设计为甲状腺素(TTR)淀粉样蛋白原纤维抑制剂是基于对已知小分子抑制剂与TTR之间通过分子对接的相互作用的分析。一系列的2,4,6-三芳基-4- ħ -1,4-恶嗪用的环化合成Ñ,ñ -双用三氯氧磷(苯甲酰甲基)苯胺3在吡啶。通过原纤维形成测定评估TTR淀粉样蛋白原纤维的抑制。结果表明,4 H -1,4-恶嗪以7.2μM的浓度显着抑制TTR淀粉样原纤维。
Reaction of 2-[(2-Oxo-2-arylethyl)anilino]-1-aryl-1-ethanones with<i>o</i>-phenylenediamine: Formation of quinoxalines
Unexpected quinoxalines () have been obtained from a one-pot reaction of 2-[(2-oxo-2-arylethyl)anilino]-1-aryl-1-ethanones () with o-phenylenediamine () in the presence of a catalytic amount of p-toluene sulfonic acid. The reaction presumably involves a tandem carbonyl addition—eliminative cyclization—air oxidation sequence. J. Heterocyclic Chem., 46, 332 (2009).
Ultrasound-mediated synthesis of N,N-bis(phenacyl)aniline under solvent-free conditions
作者:Jingyu He、Lanxiang Shi、Sijie Liu、Peng Jia、Juan Wang、Ruisheng Hu
DOI:10.1007/s00706-013-0978-7
日期:2014.1
AbstractAn efficientmethod for the synthesis of N,N-bis(phenacyl)anilines was developed via smooth condensation of anilines with α-bromoacetophenones in the presence of sodiumcarbonate as acid acceptor and polyethylene glycol 400 (PEG 400) as catalyst at room temperature under solvent-free conditions by using 350 W ultrasound irradiation. In addition to experimental simplicity, the main advantages
A Simple and Efficient One-Step Synthesis of 2,4,10a-Triaryl-1,10a-Dihydro-2<i>H</i>-Pyrazino[2,1-<i>b</i>][1,3] Benzothiazoles Catalyzed by <i>p</i>-Toluene Sulfonic Acid
A series of 2,4,10a-triaryl-1,10a-dihydro-2H-pyrazino[2,1-b][1,3]benzothiazoles were prepared in good yields by the reaction of 2-[(2-oxo-2-arylethyl) anilino]-1-aryl-1-ethanones with 2-aminothiophenol in the presence of p-toluenesulfonic acid under solventless conditions. The products were characterized by 1H NMR and 13C NMR spectroscopy.
Several hitherto unknown 3,5,7-triaryl-5,6-dihydro-4H-1,2,5-triazepines have been synthesised by cyclocondensation of N,N-bis(phenacyl)anilines with hydrazine hydrate in ethanol or ethyleneglycol under reflux condition. Increased yields were obtained in the presence of p-toluenesulfonic acid compared to the uncatalysed reaction.
在乙醇或乙二醇中,在乙醇或乙二醇中,N,N-双(苯甲酰基)苯胺与水合肼的环缩合反应合成了几种迄今未知的3,5,7-三芳基-5,6-二氢-4 H -1,2,5-三氮杂ze回流条件。与未催化的反应相比,在对甲苯磺酸的存在下获得增加的产率。