Synthesis and herbicidal activities of methyl-1-(2,4-dichlorophenoxyacetoxy)alkylphosphonate monosalts
摘要:
A series of 1-(2,4-dichlorophenoxyacetoxy)alkylphosphonic acid dimethyl esters 5 and its corresponding phosphonate monosalts 6 were synthesized as potential herbicide. The phosphonate monosalts can be prepared from 1-(2,4-dichlorophenoxyacetoxy)alkylphosphonic acid dimethyl esters 5, which were synthesized by the condensation of O,O-dimethyl-1-hydroxyalkylphosphonates with dichlorophenoxyacetic chloride. This method provides a simple and efficient procedure for the synthesis of phosphonate derivatives containing sensitive groups to acid, base or water such as carboxylate ester bond; and the herbicidal activity of title compounds was evaluated in a set of experiments in greenhouse. Most of the compounds exhibited notable herbicidal activity. (c) 2005 Elsevier B.V. All rights reserved.
Synthesis and Dealkylation of 1-(Dichloro-Phenoxyacetoxy)Alkyl Phosphonates
作者:Hongwu He、Xufeng Liu、Liming Hu、Siquan Wang、Zhaojie Liu
DOI:10.1080/10426509908546324
日期:1999.1.1
Using the silylation procedure with chlorotrimethylsilane/sodium iodide followed by alcoholysis, 1-(dichlorophenoxy acetoxy)alkyl phosphonic acid dimethyl esters can be transformed into the parent phosphonic acids without influence on carboxylate estergroup.
Synthesis and Herbicidal Activities of Lithium or Potassium Hydrogen 1-(Substituted Phenoxyacetoxy)Alkylphosphonates
作者:Hao Peng、Qingwu Long、Xiaoyan Deng、Hongwu He
DOI:10.1080/10426507.2013.797415
日期:2013.12.1
Abstract A series of lithium or potassium hydrogen 1-(substituted phenoxyacetoxy)alkylphosphonates were designed and synthesized. All the title compounds were identified by IR, 1H NMR, and 31P NMR, some of them were further analyzed by MS and elemental analyses. The test for herbicidal activity indicated that most of the phosphonates (8) possessed excellent postemergence herbicidal activities against
摘要 设计合成了一系列1-(取代苯氧基乙酰氧基)烷基膦酸锂或氢钾。所有标题化合物均通过 IR、1H NMR 和 31P NMR 进行鉴定,其中一些进一步通过 MS 和元素分析进行分析。除草活性试验表明,大多数膦酸盐(8)对阔叶杂草具有优异的芽后除草活性。补充材料可用于本文。转至出版商在线版的磷、硫和硅及相关元素,查看免费的补充文件。图形概要
Studies of <i>O</i>,<i>O</i>-Dimethyl α-(2,4-Dichlorophenoxyacetoxy)ethylphosphonate (HW02) as a New Herbicide. 1. Synthesis and Herbicidal Activity of HW02 and Analogues as Novel Inhibitors of Pyruvate Dehydrogenase Complex
On the basis of the previous work for optimization of O,O-diethyl alpha-(substituted phenoxyacetoxy)alkylphosphonates, further extensive synthetic modifications were made to the substituents in alkylphosphonate and phenoxy moieties of the title compounds. New O,O-dimethyl alpha-(substituted phenoxyacetoxy)alkylphosphonates were synthesized as potential inhibitors of pyruvate dehydorogenase complex (PDHc). Their herbicidal activity and efficacy in vitro against PDHc were examined. Some of these compounds exhibited significant herbicidal activity and were demonstrated to be effective inhibitors of PDHc from three different plants. The structure-activity relationships of these compounds including previously reported analogous compounds were studied by examining their herbicidal activities. Both inhibitory potency against PDHc and herbicidal activity of title compounds could be increased greatly by optimizing substituent groups of the title compounds. O,O-Dimethyl alpha-(2,4-dichlorophenoxyacetoxy)ethylphosphonate (I-5), which acted as a competitive inhibitor of PDHc with much higher inhibitory potency against PDHc from Pisum sativum and Phaseolus radiatus than from Oryza sativa , was found to be the most effective compound against broadleaf weeds and showed potential utility as herbicide.
Synthesis and herbicidal activities of methyl-1-(2,4-dichlorophenoxyacetoxy)alkylphosphonate monosalts
作者:Hong Wu He、Tao Wang、Jun Lin Yuan
DOI:10.1016/j.jorganchem.2005.01.061
日期:2005.5
A series of 1-(2,4-dichlorophenoxyacetoxy)alkylphosphonic acid dimethyl esters 5 and its corresponding phosphonate monosalts 6 were synthesized as potential herbicide. The phosphonate monosalts can be prepared from 1-(2,4-dichlorophenoxyacetoxy)alkylphosphonic acid dimethyl esters 5, which were synthesized by the condensation of O,O-dimethyl-1-hydroxyalkylphosphonates with dichlorophenoxyacetic chloride. This method provides a simple and efficient procedure for the synthesis of phosphonate derivatives containing sensitive groups to acid, base or water such as carboxylate ester bond; and the herbicidal activity of title compounds was evaluated in a set of experiments in greenhouse. Most of the compounds exhibited notable herbicidal activity. (c) 2005 Elsevier B.V. All rights reserved.
Synthesis and Herbicidal Activities of Sodium Hydrogen 1-(Substituted Phenoxyacetoxy)Alkylphosphonates
作者:Qingwu Long、Xiaoyan Deng、Yujiao Gao、Huayong Xie、Hao Peng、Hongwu He
DOI:10.1080/10426507.2012.717147
日期:2013.7.1
hydrogen 1-(substituted phenoxyacetoxy) alkylphosphonates was designed and synthesized. The test for herbicidalactivity indicated that most of the phosphonates (8) possessed excellent postemergence herbicidalactivities against broadleaf weeds. Especially, 8f and 8g showed the best herbicidalactivity against rape and amaranth with more than 95% inhibitory rate. Supplemental materials are available