Tacripyrines, the First Tacrine−Dihydropyridine Hybrids, as Multitarget-Directed Ligands for the Treatment of Alzheimer’s Disease
摘要:
Tacripyrines (1-14) have been designed by combining an ACNE inhibitor (tacrine) with a calcium antagonist such as nimodipine and are targeted to develop a multitarget therapeutic strategy to confront AD. Tacripyrines are selective and potent ACNE inhibitors in the nanomolar range. The mixed type inhibition of hAChE activity of compound 11 (IC50 105 +/- 15 nM) is associated to a 30.7 +/- 8.6% inhibition of the proaggregating action of ACNE on the A beta and a moderate inhibition of A beta self-aggregation (34.9 +/- 5.4%). Molecular modeling indicates that binding of compound 11 to the ACNE PAS mainly involves the (R)-11 enantiomer, which also agrees with the noncompetitive inhibition mechanism exhibited by p-methoxytacripyrine 11. Tacripyrines are neuroprotective agents, show moderate Ca2+ channel blocking effect, and cross the blood-brain barrier, emerging as lead candidates for treating AD.
Synthesis of 6-amino-1,4-dihydropyridines that prevent calcium overload and neuronal death
摘要:
The synthesis and pharmacology of 6-amino-1,4-dihydropyridines, such as ethyl 6-amino-4-aryl-5-cyano-1,4-dihydro-2-methyl-3-pyridinecarboxylic acids (3-16) and 2-amino-4-aryl-7,7-dimethyl-5-oxo-1,4,5,6,7,8-hexahydro-3-quinolinenitriles (17-21) are described. Compounds 18 and 21, at the concentration of 0.3 mu M, proved to be the best blockers of the [Ca2+] overload induced by depolarization with high [K+] of SH-SY5Y neuroblastoma cells, with values of 63.8% and 50.4%, respectively. Most of the compounds induced a remarkable neuroprotective effect against toxicity caused by high [K+]-elicited [Ca2+] overload, and against H2O2-generated free radicals, in SH-SY5Y cells. (c) 2007 Elsevier Masson SAS. All rights reserved.
Organic base grafted on magnetic nanoparticles as a recoverable catalyst for the green synthesis of hydropyridine rings
作者:Mohammad Ali Bodaghifard
DOI:10.1007/s13738-019-01788-y
日期:2020.2
Synthesis of 4-aminiquinaldine grafted on silica-coated nano-Fe3O4 particles (MNPs-AQ) and their performance as a retrievable heterogeneous basic catalyst are disclosed. The catalytic performance of this novel material was studied for the green synthesis of substituted 1,4-dihydropyridine and polyhydroquinoline derivatives via one-pot multicomponent reactions. Eco-friendly method, high yield and purity
二氧化硅包覆的纳米Fe 3 O 4接枝的4-aminiquinaldaldine的合成公开了颗粒(MNPs-AQ)及其作为可回收的非均相碱性催化剂的性能。研究了这种新型材料的催化性能,用于通过一锅多组分反应绿色合成取代的1,4-二氢吡啶和聚氢喹啉衍生物。环保的方法,所需产品的高收率和纯度以及较短的反应时间以及后处理程序的简便性概述了这些新方法相对于早期方法的优势。通过TEM,SEM,XRD,EDS和FT-IR分析技术对核/壳杂化纳米颗粒的表面和磁性进行了表征。该纳米催化剂是可再循环的,其催化活性没有任何降低。