A Quantitative Structure−Activity Relationship Study of Herbicidal Analogues of α-Hydroxy-Substituted 3-Benzylidenepyrrolidene-2,4-diones
摘要:
A series of pyrrolidine-2,4-dione and piperidine-2,4-dione derivatives were prepared and evaluated for their herbicidal activities where some of these compounds exhibited good bioactivity against Echinochloa crus-galli in comparison with sulcotrione. Quantitative structure- activity relationship studies were performed on these compounds using physicochemical parameters ( hydrophobic, electronic, and Taft) as independent parameters and herbicidal activity as a dependent parameter, where herbicidal activity correlated best (r > 0.8) with hydrophobic (pi degrees + pi(p)), steric (Es), STERIMOL (B4), indicator (H-M), van der Waals volume (V), and electronic parameter (sigma(m) + sigma(p)) in this set of molecules; the optimum van der Waals volume for R-2 is about 41.8 A(3); when B4 is equal to 3, the target molecule possessed the lowest herbicidal activity.
A Quantitative Structure−Activity Relationship Study of Herbicidal Analogues of α-Hydroxy-Substituted 3-Benzylidenepyrrolidene-2,4-diones
摘要:
A series of pyrrolidine-2,4-dione and piperidine-2,4-dione derivatives were prepared and evaluated for their herbicidal activities where some of these compounds exhibited good bioactivity against Echinochloa crus-galli in comparison with sulcotrione. Quantitative structure- activity relationship studies were performed on these compounds using physicochemical parameters ( hydrophobic, electronic, and Taft) as independent parameters and herbicidal activity as a dependent parameter, where herbicidal activity correlated best (r > 0.8) with hydrophobic (pi degrees + pi(p)), steric (Es), STERIMOL (B4), indicator (H-M), van der Waals volume (V), and electronic parameter (sigma(m) + sigma(p)) in this set of molecules; the optimum van der Waals volume for R-2 is about 41.8 A(3); when B4 is equal to 3, the target molecule possessed the lowest herbicidal activity.