Elaborate ligand-based pharmacophore exploration and QSAR analysis guide the synthesis of novel pyridinium-based potent β-secretase inhibitory leads
摘要:
beta-Secretase (BACE) inhibitors have potential as anti-Alzheimer's disease treatments prompting us to explore the pharmacophoric space of 129 known BACE inhibitors. QSAR analysis was employed to select optimal combination of pharmacophoric models and 2D physicochemical descriptors capable of explaining bioactivity variation (r(2) = 0.88, F = 60.48, r(LOO)(2) = 0.85, r(PRESS)(2) against 25 external test inhibitors = 0.71). We were obliged to use ligand efficiency as the response variable because the logarithmic transformation of bioactivities failed to access self-consistent QSAR models. Three pharmacophoric models emerged in the successful QSAR equation suggesting at least three binding modes accessible to ligands within BACE binding pocket. QSAR equation and pharmacophoric models were validated through ROC curves and were employed to guide synthesis of novel pyridinium-based BACE inhibitors. The best inhibitor illustrated an IC50 value of 1.0 mu M against BACE. (c) 2010 Elsevier Ltd. All rights reserved.
Elaborate ligand-based pharmacophore exploration and QSAR analysis guide the synthesis of novel pyridinium-based potent β-secretase inhibitory leads
作者:Afaf Al-Nadaf、Ghassan Abu Sheikha、Mutasem O. Taha
DOI:10.1016/j.bmc.2010.03.043
日期:2010.5
beta-Secretase (BACE) inhibitors have potential as anti-Alzheimer's disease treatments prompting us to explore the pharmacophoric space of 129 known BACE inhibitors. QSAR analysis was employed to select optimal combination of pharmacophoric models and 2D physicochemical descriptors capable of explaining bioactivity variation (r(2) = 0.88, F = 60.48, r(LOO)(2) = 0.85, r(PRESS)(2) against 25 external test inhibitors = 0.71). We were obliged to use ligand efficiency as the response variable because the logarithmic transformation of bioactivities failed to access self-consistent QSAR models. Three pharmacophoric models emerged in the successful QSAR equation suggesting at least three binding modes accessible to ligands within BACE binding pocket. QSAR equation and pharmacophoric models were validated through ROC curves and were employed to guide synthesis of novel pyridinium-based BACE inhibitors. The best inhibitor illustrated an IC50 value of 1.0 mu M against BACE. (c) 2010 Elsevier Ltd. All rights reserved.
Efficient synthesis of new 3-amino-4-cyanothiophene derivatives
作者:Salwa E. M. El-Meligie、Nadia A. Khalil、Hala B. El-Nassan、Ahmed A. M. Ibraheem
DOI:10.1007/s11696-020-01070-z
日期:2020.8
in isolation of the intermediate enethiolate derivative, thereby reducing quantity of the α-haloketone to one molar equivalent. Moreover, the reaction conditions were optimized to attain optimum base/solvent combination to improve the yield of the target derivatives. Following our modified procedure, three series of new 3-amino-4-cyanothiophene derivatives were synthesized and isolated in high yields