Synthesis of tervalent phosphorus esters in biphasic system using potassium phosphate as unique solid base

Ilia, Gheorghe; Iliescu, Smaranda; Macarie, Lavinia; Popa, Adriana

doi:10.1002/hc.20438

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…The potassium phosphate acts as acid scavenger without water formation according to the reaction HCl + K 3 PO 4 → KCl + K 2 HPO 4 [27]. Table 1 shows the yields, inherent viscosities, molecular weights and phosphorus content of 4a–c obtained by PTC polycondensation in solid–liquid technique.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of New Phosphorus-Containing (Co)Polyesters Using Solid-Liquid Phase Transfer Catalysis and Product Characterization

et al. 2012

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This paper is directed towards the development of safe, and thermally stable solid polymer electrolytes. Linear phosphorus-containing (co)polyesters are described, including their synthesis, thermal analysis, conductivity, and non-flammability. Polycondensation of phenylphosphonic dichloride (PPD) with poly(ethylene glycol) (PEG 12000) with and without bisphenol A (BA) was carried out using solid-liquid phase transfer catalysis. Potassium phosphate is used as base. Yields in the range of 85.0–88.0%, and inherent viscosities in the range of 0.32–0.58 dL/g were obtained. The polymers were characterized by gel permeation chromatography, FT-IR, 1H- and 31P-NMR spectroscopy and thermal analysis. Their flammability was investigated by measuring limiting oxygen index values. The polymers are flame retardants and begin to lose weight in the 190 °C–231 °C range. Solid phosphorus- containing (co)polyesters were complexed with lithium triflate and the resulting ionic conductivity was determined. Conductivities in the range of 10−7–10−8 S cm−1 were obtained.

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Section: Resultsmentioning

confidence: 99%

Synthesis of New Phosphorus-Containing (Co)Polyesters Using Solid-Liquid Phase Transfer Catalysis and Product Characterization

et al. 2012

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“…The potassium phosphate [16] acts as acid scavenger without water formation (HCl + K 3 PO 4 = KCl + K 2 HPO 4 ).…”

Section: Resultsmentioning

confidence: 99%

Green synthesis of polymers containing phosphorus in the main chain

Iliescu

Pleşu

Popa

et al. 2010

Comptes Rendus. Chimie

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“…NMR spectra were recorded on 500.1 MHz ( 1 H), 202.5 MHz ( 31 P), 125.8 MHz ( 13 C), and 50.8 MHz ( 15 N) Bruker Avance 500 DRX (Bruker, Karlsruhe, Germany) spectrometer. Chemical shifts are reported in parts per million (ppm) using tetramethylsilane ( 1 H), tert -butanol-d 1 ( 13 C) as internal standards, P(OMe) 3 in CDCl 3 ( 31 P, δ = 139.8 ppm) [ 31 ], and CH 3 NO 2 + 10% CDCl 3 ( 15 N) as external standards. 13 C- and 31 P-NMR spectra were proton-decoupled unless otherwise specified.…”

Section: Methodsmentioning

confidence: 99%

On the Reaction of Carbonyl Diphosphonic Acid with Hydroxylamine and O-alkylhydroxylamines: Unexpected Degradation of P-C-P Bridge

et al. 2017

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Derivatives of methylenediphosphonic acid possess wide spectra of biological activities and are used in enzymology as research tools as well as in practical medicine. Carbonyl diphosphonic acid is a promising starting building block for synthesis of functionally substituted methylenediphosphonates. Investigation of the interaction of carbonyl diphosphonic acid with hydroxylamine clearly demonstrates that it is impossible to isolate oxime within the pH range 2–12, while only cyanophosphonic and phosphoric acids are the products of the fast proceeding Beckmann-like fragmentation. In the case of O-alkylhydroxylamines, corresponding alcohols are found in the reaction mixtures in addition to cyanophosphonic and phosphoric acids. Therefore, two residues of phosphonic acid being attached to a carbonyl group provide new properties to this carbonyl group, making its oximes very unstable. This principally differs carbonyl diphosphonic acid from structurally related phosphonoglyoxalic acid and other α-ketophosphonates.

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Synthesis of tervalent phosphorus esters in biphasic system using potassium phosphate as unique solid base

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Cited by 7 publications

References 35 publications

Synthesis of New Phosphorus-Containing (Co)Polyesters Using Solid-Liquid Phase Transfer Catalysis and Product Characterization

Synthesis of New Phosphorus-Containing (Co)Polyesters Using Solid-Liquid Phase Transfer Catalysis and Product Characterization

Green synthesis of polymers containing phosphorus in the main chain

On the Reaction of Carbonyl Diphosphonic Acid with Hydroxylamine and O-alkylhydroxylamines: Unexpected Degradation of P-C-P Bridge

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