3D-QSAR studies on chromone derivatives as HIV-1 protease inhibitors

The three-dimensional quantitative structure–activity relationship (3D-QSAR) approach using comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) was applied to a series of 30 chromone derivatives, a new class of HIV-1 protease inhibitors. The best predictive CoMFA model gives cross-validated r2 ðq2Þ ¼ 0:763; non-cross-validated r2 ¼ 0:967; standard error of estimate ðSÞ ¼ 5:092; F ¼ 90:701: The best CoMSIA model has q2 ¼ 0:707; non-cross-validated r2 ¼ 0:943; S ¼ 7:018; F ¼ 51:734; included steric, electrostatic, hydrophobic, and hydrogen bond donor fields. The predictive ability of these models was validated by a set of five compounds that were not included in the training set. The calculated (predicted) and experimental inhibitory activities were well correlated. The contour maps obtained from CoMFA and CoMSIA models were in agreement with the previous docking study for this chromone series. q 2003 Elsevier B.V. All rights reserved