13317-44-7Relevant academic research and scientific papers
Dramatic influence of the nature of the surfactant aggregate on the rate constant for hydrolysis of phosphinate esters in aqueous nematic lyotropic liquid crystals
Ramesh,Labes
, p. 738 - 741 (1988)
The o-iodosobenzoic acid catalyzed hydrolysis of two organophosphinate esters has been studied in the lyotropic nematic phases of myrystyltrimethylammonium bromide in 1-decanol, ammonium bromide, and water. Depending on the concentration of these ingredients, three phases are observed at room temperature consisting of rod-like (N//C), disk-like (N//L), or sphere-like (I) aggregates. There is a three order of magnitude difference in the rate constant for hydrolysis between N//L and N//C phases. The N//L phase serves as a protective environment, preventing the hydrolysis of the ester, whereas the N//C phase allows the reaction to occur rapidly. Based upon infrared evidence, the phosphinate ester is solubilized in the hydrocarbon region of N//L aggregates, but in N// C and I aggregates the solute is nearer the aqueous interface.
Phenyl diethyl phosphinic acid rare earth salt, synthetic method and application
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Paragraph 0043; 0045; 0047; 0051; 0055, (2017/08/25)
The invention relates to rare earth phenylethyl phosphinate, and a synthesis method and an application thereof. The invention relates to the technical field of chemical synthesis. Rare earth phenylethyl phosphinate has a structural formula as the following, wherein one of R1 and R2 is phenyl and the other is ethyl, M is a lanthanide-series light rare earth element, and n is 3. The preparation method comprises the following steps: phenylethyl phosphinic acid is prepared; phenylethyl phosphinic acid and water are added into a reactor with a heating device and a stirring device; the temperature is increased slowly until the phenylethyl phosphinic acid is completely dissolved in water; under a heating condition, a rare earth chloride water solution is dropped gradually, and a reaction is carried out under a maintained temperature; when the reaction is finished, the temperature is reduced, and cooling is carried out; and filtering, washing and drying treatments are carried out, such that a finished product is obtained. The rare earth phosphinate with the phenylethyl structure is a flame retardant with structural innovativeness, safety, high efficiency, synergistic effect and wide adaptability.
Resolution of chiral phosphate, phosphonate, and phosphinate esters by an enantioselective enzyme library
Nowlan, Charity,Li, Yingchun,Hermann, Johannes C.,Evans, Timothy,Carpenter, Joseph,Ghanem, Eman,Shoichet, Brian K.,Raushel, Frank M.
, p. 15892 - 15902 (2007/10/03)
An array of 16 enantiomeric pairs of chiral phosphate, phosphonate, and phosphinate esters was used to establish the breadth of the stereoselective discrimination inherent within the bacterial phosphotriesterase and 15 mutant enzymes. For each substrate,
Solvent effects on reactions of hydroxide and oximate ions with phosphorus(V) esters
Bunton, Clifford A.,Gillitt, Nicholas D.,Kumar, Anurag
, p. 221 - 228 (2007/10/03)
Second-order rate constants of reactions of OH-, 2,3-butanedionemonooximate and 2-hydroxybenzaldoximate ions with aryl phosphate, phosphinate and thioarylphosphinate esters go through minima with decreasing water content of aqueous acetonitrile, tert-butyl alcohol and N-methyl-2-pyrrolidone. For reactions in H2O-MeCN the solvent effects are analyzed in terms of activity coefficients of the anionic nucleophiles and transition states. In the drier solvents partial desolvation of the nucleophiles increases rates. Nucleophilicities of several oximates and inorganic anions are compared in water.
Phosphorous-containing cysteine and serine protease inhibitors
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, (2008/06/13)
The present invention is directed to novel phosphorous-containing inhibitors of cysteine or serine proteases. Methods for the use of the protease inhibitors are also described.
