5995-25-5Relevant articles and documents
Study on the synergistic antibacterial effect of silver-carried layered zirconium alkyl-N,N-dimethylenephosphonate
Liu, Li,Liu, Changhua,Nie, Ling,Jiang, Ting,Hong, Jing,Zhang, Xiaomei,Luo, Liehong,Wang, Xiaolan
, p. 66 - 72 (2015)
A series of zirconium alkyl-N,N-dimethylenephosphonate silver-carrying (Ag-ZRDP) were successfully prepared and their potential applications as synergistic antibacterial materials were investigated. Silver nanoparticles (Ag NPs), of 30 nm in diameter, were tightly anchored onto the zirconium alkyl-N,N-dimethylenephosphonate (ZRDP), increasing the antibacterial activity of the Ag NPs due to a decrease in the extent of nanoparticle aggregation. Due to the synergistic antibacterial effect of the Ag NPs and ZRDP, the Ag-ZRDP showed a better antibacterial activity than Ag NPs and ZRDP with a minimal inhibition concentration (MIC) of 0.25 and 0.25 μg mL-1 against Escherichia coli and Staphylococcus aureus, respectively. Additionally, the Ag-ZRDP did not show obvious cytotoxicity against mammalian cells (A549 cells), even at a concentration of 256 μg mL-1. Collectively, these properties make the newly synthesized Ag-ZRDP potentially superior as disinfectants and antiseptics for various biomedical and biotechnological applications.
METHOD FOR THE SYNTHESIS OF ALPHA-AMINOALKYLENEPHOSPHONIC ACID
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Page/Page column 26; 29, (2014/02/15)
The present invention is related to a new method for the synthesis of alpha-aminoalkylenephosphonic acid or its phosphonate esters comprising the steps of forming a reaction mixture by mixing a P-O-P anhydride moiety comprising compound, having one P-atom at the oxidation state (+111) and the other P-atom at the oxidation state (+111) or (+V), an aminoalkanecarboxylic acid and an acid catalyst, wherein said reaction mixture comprises an equivalent ratio of alpha-aminoalkylene carboxylic acid to P-O-P anhydride moieties of at least 0.2, and recovering the resulting alpha-aminoalkylene phosphonic acid compound or an ester thereof from the reaction mixture.
Synthesis of bis- and tris-organophosphorus substituted amines and amino acids with PCH2N Fragments
Prishchenko, Andrey A.,Livantsov, Mikhail V.,Novikova, Olga P.,Livantsova, Ludmila I.,Petrosyan, Valery S.
experimental part, p. 430 - 440 (2011/07/29)
The aminomethylation of the derivatives of trivalent organophosphorus acids, containing PH and POSiMe3 fragments with various bis- and tris(alkoxymethyl)amines and bis(alkoxymethyl)amino acids, is proposed as a convenient method for the synthesis of new bis- and trisphosphorylated amines and amino acids as well as their derivatives with four and five coordinated phosphorus. Also the three-components systems of phosphorous acid, paraformaldehyde, and amines are thoroughly investigated via the treatment of reaction mixtures with bis(trimethylsilyl)amine.
Method for the Manufacture of Aminoalkylene Phosphonic Acid
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Page/Page column 10, (2009/11/30)
A method for the manufacture of amino alkylcnc phosphonic acids is disclosed. Pure P4O6 is hydrolyzed in the presence of a homogeneous Brocnstcd acid catalyst whereby the pH of the reaction medium is maintained below 5 and the free water content of said reaction medium is, after the P4O6 hydrolysis has been completed, from 0 to 40 %. The required amine component can be added before, during, or in one preferred execution, after the P4O6 hydrolysis has been completed. Formaldehyde is then added and the reaction mixture containing the P4O6 hydrolysate, the amine and the formaldehyde is reacted in presence of a Broensted acid catalyst selected from homogeneous and heterogeneous species. The amino alkylene phosphonic acid reaction product can then be recovered in a manner known per sé.
Process for the manufacture of aminopolyalkylene-phosphonic acid compounds
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Page/Page column 6-7; 11-13; 14-15, (2008/06/13)
A beneficial method for the manufacture of amino polyalkylene phosphonic acids, under substantial absence of hydrohalogenic acid, is disclosed. The method, in essence, is based on reacting narrowly defined ratios of phosphorous acid, an amine, a formaldehyde in presence of specific ranges of an acid catalyst having a pKa equal or inferior to 3.1. The inventive method is capable of yielding economically and quality operational/capacity advantages, in particular significantly reduced one-step cycle duration under exclusion of corrosion disadvantages and also is environmentally friendly without requiring, in that respect, anything more than nominal capital expenditures.
Process for the manufacture of aminoakylenephosphonic acid compounds in the presence of a heterogeneous catalyst
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Page/Page column 7-8, (2008/06/13)
A beneficial method for the manufacture of amino polyalkylene phosphonic acids, under substantial absence of hydrohalogenic acid, is disclosed. The method, in essence, is based on reacting narrowly defined ratios of phosphorous acid, an amine and a formaldehyde in presence of a heterogeneous Broensted acid catalyst. The inventive method is capable of yielding economically and quality operational/capacity advantages, in particular significantly reduced one-step cycle duration under exclusion of corrosion disadvantages and also is environmentally friendly without requiring, in that respect, anything more than nominal capital expenditures.
