Quantitative Structure−Activity Relationship Studies of [(Biphenyloxy)propyl]isoxazole Derivatives. Inhibitors of Human Rhinovirus 2 Replication
摘要:
The 50% cytotoxic concentration (CC50) in HeLa cells, the 50% inhibitory concentration (IC50) against human rhinovirus 2 (HRV-2), and the selectivity index (SI = CC50/IC50) of [(biphenyloxy)propyl]isoxazole derivatives were used to develop quantitative structure-activity relationships (QSAR) based on simplex representation of molecular structure. Statistic characteristics for partial least-squares models are quite satisfactory (R-2 = 0.838 - 0.918; Q(2) = 0.695 - 0.87) for prediction of CC50, IC50, and SI values and permit the virtual screening and molecular design of new compounds with strong anti-HRV-2 activity. The quality of prognosis for designed compounds was additionally estimated by analysis of domain applicability for each QSAR model. A hypothesis to the effect that terminal benzene substituents must have negative electrostatic potential and definite length (approximately 5.5-5.6 A) to possess strong antiviral activity has been suggested. The quality of developed analysis, i.e., high level of antiviral action of three new designed compounds, has been confirmed experimentally.
A series of biphenyl analogs, 6, of 5-[5-(2,6-dichloro-5-oxazolylphenoxy)pentyl]-3-methylisoxazole (2) have been synthesized and tested in vitro against 10 human rhinovirus serotypes in a TCID50 assay. The most potent compound in the series 6s, 3-[3-[2,6-dimethyl-4-(4-fluorophenyl)phenoxy]propyl]-3-methylisoxazole, was screened against an additional 84 serotypes. It was found to be active against 64 of the serotypes, while 87 serotypes were sensitive to 2 at <3 mu g/mL. On comparison of the active serotypes, 6s exhibited greater potency versus 2. Analogs 6a-c,s were examined for in vitro metabolic stability by monkey liver microsomal assay. These analogs exhibited a greater than 7-fold improvement (t(1/2) > 200 min) in metabolic stability compared with 2 (t(1/2) > 27 min).
A series of biphenyl analogs, 6, of 5-[5-(2,6-dichloro-5-oxazolylphenoxy)pentyl]-3-methylisoxazole (2) have been synthesized and tested in vitro against 10 human rhinovirus serotypes in a TCID50 assay. The most potent compound in the series 6s, 3-[3-[2,6-dimethyl-4-(4-fluorophenyl)phenoxy]propyl]-3-methylisoxazole, was screened against an additional 84 serotypes. It was found to be active against 64 of the serotypes, while 87 serotypes were sensitive to 2 at <3 mu g/mL. On comparison of the active serotypes, 6s exhibited greater potency versus 2. Analogs 6a-c,s were examined for in vitro metabolic stability by monkey liver microsomal assay. These analogs exhibited a greater than 7-fold improvement (t(1/2) > 200 min) in metabolic stability compared with 2 (t(1/2) > 27 min).
Quantitative Structure−Activity Relationship Studies of [(Biphenyloxy)propyl]isoxazole Derivatives. Inhibitors of Human Rhinovirus 2 Replication
作者:Victor E. Kuz'min、Anatoly G. Artemenko、Eugene N. Muratov、Ingrid L. Volineckaya、Vadim A. Makarov、Olga B. Riabova、Peter Wutzler、Michaela Schmidtke
DOI:10.1021/jm0704806
日期:2007.8.1
The 50% cytotoxic concentration (CC50) in HeLa cells, the 50% inhibitory concentration (IC50) against human rhinovirus 2 (HRV-2), and the selectivity index (SI = CC50/IC50) of [(biphenyloxy)propyl]isoxazole derivatives were used to develop quantitative structure-activity relationships (QSAR) based on simplex representation of molecular structure. Statistic characteristics for partial least-squares models are quite satisfactory (R-2 = 0.838 - 0.918; Q(2) = 0.695 - 0.87) for prediction of CC50, IC50, and SI values and permit the virtual screening and molecular design of new compounds with strong anti-HRV-2 activity. The quality of prognosis for designed compounds was additionally estimated by analysis of domain applicability for each QSAR model. A hypothesis to the effect that terminal benzene substituents must have negative electrostatic potential and definite length (approximately 5.5-5.6 A) to possess strong antiviral activity has been suggested. The quality of developed analysis, i.e., high level of antiviral action of three new designed compounds, has been confirmed experimentally.