Synthesis and Herbicidal Activities of 2-Methylpropan-2-Aminium Methyl 1-(Substituted Phenoxyacetoxy) Alkylphosphonates
作者:Ling Gao、Xiaoyan Deng、Xiaosong Tan、Qingwu Long、Hao Peng、Hongwu He
DOI:10.1080/10426507.2012.736101
日期:2013.8.1
2-methylpropan-2-aminium methyl1-(substitutedphenoxyacetoxy) alkylphosphonates were selectively synthesized by reacting the corresponding dimethyl 1-(substitutedphenoxyacetoxy)alkylphosphonates with an excess of 2-methylpropan-2-amine. All the title compounds were identified by IR, 1H NMR, and 31P NMR, some of them were further analyzed by 19F NMR and 13C NMR. Their herbicidal activity was investigated and
The Preparation of Dimethyl α -Hydroxyphosphonates and the Chemical Shift Non-Equivalence of Their Diastereotopic Methyl Ester Groups
作者:Harry R. Hudson、Ramon O. Yusuf、Ray W. Matthews
DOI:10.1080/10426500701690905
日期:2008.6.9
alkanals, aryl aldehydes (or aryl methyl ketones), furfuraldehyde, and 2- or 3-thiophenecarboxaldehyde, respectively, thus confirming the general utility of this synthetic procedure. The 1H and 13C nmr spectra of the products exhibit characteristic chemical shift non-equivalence of the diastereotopic methyl ester groups, for which a tentative order of non-equivalence is reported and discussed.
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
Synthesis and Biological Activities of <i>O</i>,<i>O</i>-Dialkyl 1-((4,6-Dichloropyrimidin-2-yl)Carbamyloxy) Alkylphosphonates
作者:Liang Xu、Geyun You、Hao Peng、Hongwu He
DOI:10.1080/10426507.2013.855774
日期:2014.6.3
A series of new 1-((4,6-dichloropyrimidin-2-yl)carbamyloxy) alkylphosphonates were designed and synthesized. The structures of all the title compounds were confirmed by IR, H-1-NMR, P-31-NMR and elemental analysis. The results of the bioassay showed that all of title compounds exhibited weak herbicidal activities against monocotyledons and dicotyledons; however, some of them showed potential plant growth regulatory activities.