Molecular Docking and Three-Dimensional Quantitative Structure−Activity Relationship Studies on the Binding Modes of Herbicidal 1-(Substituted Phenoxyacetoxy)alkylphosphonates to the E1 Component of Pyruvate Dehydrogenase
摘要:
Molecular docking and three-dimensional quantitative structure-activity relationship (3D-QSAR) studies on the title compounds were performed to explore the possible inhibitory mechanism. To determine the probable binding conformations of the title phosphonate derivatives, the most potent compound 12 was chosen as a standard template and docked into the active site of PDHc E1. On the basis of the binding conformations, highly predictive 3D-QSAR models were developed with q(2) values of 0.872 and 0.873 for comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA), respectively. The predictive abilities of these models were validated by using a set of compounds that were not included in the training set. Both the CoMFA and the CoMSIA field distributions are in good agreement with the spatial and electronic structural characteristics of the binding groove of PDHc E1 selected in this work. Mapping the 3D-QSAR models to the active site of PDHc E1 provides new insight into the protein-inhibitor interaction mechanism, which is most likely valuable and applicable for designing highly active compounds in the future.
一系列新颖的O,O-二甲基1-(取代的苯氧基乙酰氧基)-1-(吡啶-2-基或噻吩-2-基)甲基膦酸酯6a,6b,6c,6d,6e,6f,6g,6h,6i,合成了6j,6k,6l,6m,6n和7a,7b,7c,7d。其结构已通过IR确认11 H NMR,质谱和元素分析。初步生物测定的结果表明,某些标题化合物具有中等至良好的除草和杀真菌活性。例如,标题化合物6a,6c,6l,6m和7d在1500 g ai / ha的剂量下对大多数受试植物具有90-100%的抑制作用,而标题化合物6b,6g,6h和6n具有抑制作用针对92-100%抑制尖镰孢,Phyricularia菌,葡萄孢属cinereapers,玉蜀黍赤霉,浓度为50 mg / L的核盘菌菌核病菌(Sclerotinia sclerotiorum)和锥尾核孢菌(Cercospora beticola)。
SIMPLE AND IMPROVED PREPARATION OF α-OXOPHOSPHONATE MONOLITHIUM SALTS
作者:Tao Wang、Hong Wu He
DOI:10.1080/10426500490474941
日期:2004.10.1
Some α-OxoPhosphonate monolithium salts were synthesized by a facile one-step procedure. In this way, α-(2,4-dichlorophenoxyacetoxy)alkyl phosphonic acid dimethyl esters 5 can be transformed into the corresponding phosophonate monolithium salts 6 without influence on the carboxylic ester group under mild conditions.