Identification of dihydropyridines that reduce cellular tau levels
作者:Christopher G. Evans、Umesh K. Jinwal、Leah N. Makley、Chad A. Dickey、Jason E. Gestwicki
DOI:10.1039/c0cc02253e
日期:——
A series of dihydropyridines were identified that have an effect on the accumulation of tau, an important target in Alzheimer's disease. The dihydropyridine collection was expanded using the Hantzsch multicomponent reaction to develop preliminary structure–activity relationships.
Hantzsch adducts with different substituents at the C-4 position were synthesized through multicomponent reactions by using citric or lactic acid as catalysts. To the best of our knowledge, this is the first report on the synthesis of such a class of compounds based on multicomponent reactions catalyzed by non-toxic organic acids. The potential to scavenge reactive nitrogen/oxygen species (RNS/ROS) and
Correction to Enantioselective Organocatalytic Hantzsch Synthesis of Polyhydroquinolines
作者:C. G. Evans、J. E. Gestwicki
DOI:10.1021/ol5028255
日期:2014.11.21
shows that the Hantzsch reaction to produce compound 4b does not proceed in the absence of catalyst. We previously neglected to include this important data. This material is available free of charge via the Internet at http://pubs.acs.org. This article is cited by 1 publications. The following changes were made to the revised Supporting Information document submitted with this correction: (1) All data
<i>N</i>-rich Porous Organic Polymer as Heterogeneous Organocatalyst for the One-Pot Synthesis of Polyhydroquinoline Derivatives through the Hantzsch Condensation Reaction
作者:Sabuj Kanti Das、Sujan Mondal、Sauvik Chatterjee、Asim Bhaumik
DOI:10.1002/cctc.201702013
日期:2018.6.7
nitrogen‐rich new porous organic polymer showed very high catalytic efficiency for one‐pot proficient synthesis of polyhydroquinoline derivatives via microwave assisted condensation reaction. As little as 8 mg of catalyst was found to be effective under the optimum reaction conditions. In addition, TrzMOP catalyzed synthesis of biologicallyactive polyhydroquinoline derivatives are very cost effective
在设计具有表面碱性的合适的非均相有机催化剂时,非常需要将氮官能团结合到高表面积的多孔聚合物网络上。在这里我们报告了一种新的基于N的富含三嗪的微孔有机聚合物(TrzMOP)的合成方法,该方法涉及一个简单而有效的缩合途径,涉及1,4-双(4,6-二氨基-s-三嗪-2-基)之间的反应苯(SL-1)和2,5-噻吩二甲醛。通过使用粉末XRD,FTIR光谱,固态魔角旋转13 C NMR,CHN分析,FESEM,HRTEM,CO 2 -TPD和N 2对材料进行了表征吸附/解吸技术。这种富含氮的新型多孔有机聚合物显示出非常高的催化效率,可通过微波辅助缩合反应一锅高效地合成聚氢喹啉衍生物。在最佳反应条件下,发现只有8 mg的催化剂有效。另外,与目前用作非均相催化剂的那些相比,TrzMOP催化的生物活性聚氢喹啉衍生物的合成具有很高的成本效益,可扩展性,更少的时间消耗以及对环境无害。
Melamine supported on hydroxyapatite-encapsulated-γ-Fe2O3: a novel superparamagnetic recyclable basic nanocatalyst for the synthesis of 1,4-dihydropyridines and polyhydroquinolines
γ-Fe2O3@ HAp@Melamine as a magnetic powerful basic nanocatalyst was probed through one-potsynthesis of 1, 4-dihydropyridine and polyhydroquinoline derivatives through Hantzsch condensation reaction under solvent-free thermal conditions. The heterogeneous catalyst could be recovered easily by simple magnetic decantation and reused many times without significant loss of its catalytic activity.