Results 211 to 220 of about 3,653 (253)

A Novel Synthesis of Aminomethylphosphonic Acid

Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry, 1972
Abstract Aminomethylphosphonic acid, H2NCH2P(O) (OH)2, was prepared in high yield from t-butylaminomethylphosphonic acid, t-C4H9NHCH2P(O) (OH)2, by iso-buty-lene elimination in concentrated aqueous hydrobromic or hydrochloric acid at 175° in a sealed tube.
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Synthesis of C-heteryl-substituted aminomethylphosphonic acids derivatives

Russian Journal of General Chemistry, 2010
The available diethyl 5-hydrazino-2-p-tolyl-1,3-oxazol-1-ylphosphonate was readily acylated with chlorides of carboxylic acids of heterocyclic series. On heating in acetic acid it underwent the oxazole ring cleavage, recyclization and diethylation that was used to prepar the substituted 2-p-toluylaminomethylphosphonic acids containing a series of 2 ...
A. V. Golovchenko, R. N. Solomyannyi, V. S. Brovarets   +2 more
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Degradation and Isotope Source Tracking of Glyphosate and Aminomethylphosphonic Acid

Journal of Agricultural and Food Chemistry, 2016
Glyphosate [N-(phosphonomethyl) glycine], an active ingredient of the herbicide Roundup, and its main metabolite, aminomethylphosphonic acid (AMPA), have been frequently reported to be present in soils and other environments and thus have heightened public concerns on their potential adverse effects.
Hui, Li, Sunendra R, Joshi, Deb P, Jaisi
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ChemInform Abstract: Substituted Aminomethylphosphonic Acids and Their Esters.

Chemischer Informationsdienst, 1986
AbstractDas Bis‐oxazolidinyl‐p‐xylol (I) reagiert mit phosphoriger Säure bzw. Dialkylphosphiten (II) zu der Bis‐phosphonsäure (IIIa) bzw. den Estern (IIIb) und (IIIc), die sich auch durch Aminomethylierung von (II) mit Bis‐(β‐hydroxyethylamino)‐p‐xylol (IV) und Formaldehyd darstellen lassen.
E. E. NIFANT'EV, L. M. RUNOVA, T. G. SHESTAKOVA, E. V. BOGATYREVA, V. I. RONKOV   +4 more
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Comments on the Synthesis of Aminomethylphosphonic Acid

Synthesis, 1989
Two simple methods for the synthesis of aminomethylphosphonic acid from phosphorus (III) chloride and 1,3,5-triacylhexahydro-1,3,5-triazine or N-(hydroxymethyl) benzamide are ...
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Aminomethylphosphonic acid (AMPA) retention in different soil profile horizons

2020
<p>Aminomethylphosphonic acid (AMPA) is a metabolite of microbial degradation of the widely used herbicide glyphosate and other phosphonate compounds, such as detergents. In the soil, AMPA has a strong adsorption than the glyphosate. No studies have been reported on adsorption of AMPA in the soil profile.
Eliana Gonzalo Mayoral, Virginia Aparicio, José Luis Costa, Eduardo De Gerónimo   +3 more
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Adsorption Of Aminomethylphosphonic Acids On The Calcium Sulfate Dihydrate Crystal Surface

SPE Oilfield and Geothermal Chemistry Symposium, 1979
Abstract The adsorption of four phosphonic acids an the calcium sulfate dehydrate crystal surface has been studied as a function of pH. Tendencies toward adsorption increase as the pH of the solution is raised from 4 to 7, then level off or fall off as the pH is further increased from 7 to 9.
Sung-Tsuen Liu, David Griffiths
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Removal of glyphosate and aminomethylphosphonic acid from synthetic water by nanofiltration

Environmental Technology, 2017
The removal of glyphosate and aminomethylphosphonic acid (AMPA) with synthetic water was carried out on a lab-scale nanofiltration unit using two membranes, NFX and NFW. The presence of humic acid and some inorganic matters (CaCl2 and NaCl) was tested in the experiment.
Jiang, Yuan, Jinming, Duan, Christopher P, Saint, Dennis, Mulcahy   +3 more
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ChemInform Abstract: A ONE‐STEP SYNTHESIS OF AMINOMETHYLPHOSPHONIC ACID

Chemischer Informationsdienst, 1982
AbstractDas einstufige Verfahren zur Herstellung von Aminomethylphosphonsäure (II) aus Nitrilotrimethylen‐triphos: phonsäure (I) durch elektrochemische Oxidation in Wasser ohne Elektrolytzusatz wird untersucht.
J. H. WAGENKNECHT, F. S. STOVER, W. G. WAGNER, R. S. MITCHELL   +3 more
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Dissipation of Glyphosate and Aminomethylphosphonic Acid in North American Forests

Journal of Agricultural and Food Chemistry, 1994
Residues of glyphosate (N-phosphonomethylglycine) and its metabolite aminomethylphosphonic acid (AMPA) were followed on three forested sites in Oregon, Michigan, and Georgia. Eight-hectare residual stands of low-quality hardwoods were treated with 4.12 kg/ha glyphosate ae applied aerially in late summer.
Michael Newton, Leah M. Horner, John E. Cowell, Diane E. White, Elizabeth C. Cole   +4 more
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