Results 201 to 210 of about 3,653 (253)
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Charge density distribution in aminomethylphosphonic acid
Acta Crystallographica Section B Structural Science, 2010The experimental charge density distribution in aminomethylphosphonic acid has been determined from X-ray diffraction and its topological features have been analyzed. The results have shown that the P—O bonds are highly polarized, moreover the P—OH bond is weaker than the bonds to unprotonated O atoms.
Rafał, Janicki +1 more
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Glyphosate and aminomethylphosphonic acid (AMPA) residues in Brazilian honey
Food Additives & Contaminants: Part B, 2020Glyphosate (GLY) is the most widely used herbicide in the world and studies have shown that its exposure at sublethal doses has led to reduced sensitivity and decreased associative memory in bees. Thus, a high-performance liquid chromatography-fluorescence detector with derivatisation reaction was used to determine residues of GLY and ...
Ana Paula Ferreira de Souza +2 more
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A Convenient Synthesis of Aminomethylphosphonic Acid
Synthetic Communications, 1986Abstract A novel procedure for the preparation of aminometnylphosphonic acid (AMPA) is described. This compound. which has been shown to have some biological activity, is synthesized by treating N-hydroxymethylbenzamide with a mixture of phosphorous trichloride and trimethyl phosphite, followed by hydrolysis of the ester intermediate.
Mitchell J. Pulwer, Terry M. Matthazor
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Certain derivatives of aminomethylphosphonic acid
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 19551. Experiments on the acylatlon of aminomethylphosphonic acid show that it proceeds with greater difficulty than the acylation of glycine. Acetamidomethyl-, (chloroacetamido)methyl-, and phthalimidamethyl-phosphonic acids have been prepared. 2. The methylation of aminomethylphosphonic acid has been effected by means of methyl iodide in a
M. I. Kabachnik, T. Ya. Medved
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A One-Step Synthesis of Aminomethylphosphonic Acid
Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 1982Abstract Aminomethylphosphonic acid is prepared by the one-step electrochemical oxidation of nitrilotrimethylene triphosphonic acid in water.
J. H. Wagenknecht +3 more
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Aminomethylphosphonic Acid Accumulation in Plant Species Treated with Glyphosate
Journal of Agricultural and Food Chemistry, 2008Aminomethylphosphonic acid (AMPA) is the most frequently detected metabolite of glyphosate in plants. The objective of this study was to determine if there is any correlation of metabolism of glyphosate to AMPA in different plant species and their natural level of resistance to glyphosate. Greenhouse studies were conducted to determine the glyphosate I
Krishna N, Reddy +3 more
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Aminomethylphosphonic Acid and Glyphosate Adsorption onto Goethite: A Comparative Study
Environmental Science & Technology, 2004Glyphosate is a non-selective, broad spectrum, post-emergent herbicide widely used in weed control. Aminomethylphosphonic acid (AMPA) is one of the main products of biodegradation of glyphosate in natural systems before its ultimate mineralization and also the breakdown product of more complex phosphonates such as nitrilotris-(methylenephosphonic acid).
B C, Barja, M, Dos Santos Afonso
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Rapid Communications in Mass Spectrometry, 2003
Abstract A detailed MS n study of glyphosate, glufosinate and their main metabolites, aminomethylphosphonic acid and methylphosphinicopropionic acid, using an ion trap mass spectrometer, was performed.
Lee, Goodwin +3 more
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Abstract A detailed MS n study of glyphosate, glufosinate and their main metabolites, aminomethylphosphonic acid and methylphosphinicopropionic acid, using an ion trap mass spectrometer, was performed.
Lee, Goodwin +3 more
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ChemInform Abstract: A Convenient Synthesis of Aminomethylphosphonic Acid.
Chemischer Informationsdienst, 1986AbstractDie im Titel genannte Verbindung (III) wird in guten Ausbeuten durch Erwärmen des Benzamids (I) mit Phosphortrichlorid und Trimethylphosphit und nachfolgende saure Hydrolyse des Phosphonats (II) erhalten.
M. J. PULWER, T. M. BALTHAZOR
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A Convenient Synthesis of Aminomethylphosphonous Acid
Synthetic Communications, 1989Abstract Aminomethylphosphonous acid has been prepared in exellent yield by alkylation of bis(trimethylsilyl) ethoxycarbonylphosphonite 2 with N-(bromomethyl)phthalimide 1, followed by acidic removal of protecting groups.
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