scholarly journals A novel and efficient method to prepare 2-aryltetrahydrofuran-2-ylphosphonic acids

2010 ◽  
Vol 6 ◽  
Author(s):  
Vsevolod V Komissarov ◽  
Anatoly M Kritzyn ◽  
Jouko J Vepsäläinen
Keyword(s):  
Acetic Acid ◽  
Efficient Method ◽  
Phosphonic Acid ◽  
Acid Group ◽  
Phosphorus Trichloride ◽  
One Pot ◽  
End Products ◽  
Phosphonic Acid Group ◽  
Acidic Conditions ◽  
Anchimeric Assistance

A novel one-pot method was developed for the synthesis of the title compounds starting from 4-chloro-1-aryl-1-butanones 1, phosphorus trichloride and acetic acid. The end products 2 were obtained in 20–94% yield. The cyclization step under acidic conditions probably occurs as a result of anchimeric assistance of the phosphonic acid group.

ChemInform Abstract: Modern Advances of Chemical Methods for the Introduction of a Phosphonic Acid Group

ChemInform ◽  
2012 ◽  
Vol 43 (9) ◽  
pp. no-no
Author(s):  
Charles S. Demmer ◽  
Niels Krogsgaard-Larsen ◽  
Lennart Bunch
Keyword(s):  
Phosphonic Acid ◽  
Acid Group ◽  
Chemical Methods ◽  
Phosphonic Acid Group

scholarly journals Solar H2 evolution in water with modified diketopyrrolopyrrole dyes immobilised on molecular Co and Ni catalyst–TiO2 hybrids

2017 ◽  
Vol 8 (4) ◽  
pp. 3070-3079 ◽  
Author(s):  
Julien Warnan ◽  
Janina Willkomm ◽  
Jamues N. Ng ◽  
Robert Godin ◽  
Sebastian Prantl ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Phosphonic Acid ◽  
Acid Group ◽  
Side Chain ◽  
Oxide Surfaces ◽  
Ni Catalyst ◽  
H2 Evolution ◽  
Metal Oxide Surfaces ◽  
Phosphonic Acid Group

A series of diketopyrrolopyrrole (DPP) dyes with a terminal phosphonic acid group for attachment to metal oxide surfaces were synthesised and the effect of side chain modification on their properties investigated.

scholarly journals Modification of Poly(ether ether ketone) Polymer for Fuel Cell Application

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Devesh Shukla ◽  
Yuvraj Singh Negi ◽  
Vijai Kumar
Keyword(s):  
Thermal Stability ◽  
Fuel Cell ◽  
Phosphonic Acid ◽  
Pem Fuel Cell ◽  
Acid Group ◽  
Good Thermal Stability ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Phosphonic Acid Group ◽  
Ether Ketone

Polyelectrolyte membrane (PEM) is an important part of PEM fuel cell. Nafion is a commercially known membrane which gives the satisfactory result in PEM fuel cell operating at low temperature. Present research paper includes functionalization of Poly(ether ether ketone) (PEEK) polymer with phosphonic acid group. The functionalization was done with the help of nickel-based catalyst. Further, the polymer was characterized by the FTIR, EDAX, DSC, TGA, and 1H NMR, and it was found that PEEK polymer was functionalized with phosphonic acid group with good thermal stability in comparison to virgin PEEK. Finally, the thin films of functionalized polymer were prepared by solution casting method, and proton conductivity of film samples was measured by impedance spectra whose value was found satisfactory with good thermal stability in comparison to commercially available Nafion membrane.

γ-Phosphono-γ-lactones. The use of allyl esters as easily removable phosphonate protecting groups

1985 ◽  
Vol 63 (4) ◽  
pp. 823-827 ◽  
Author(s):  
Matthias Kamber ◽  
George Just
Keyword(s):  
Carboxylic Acids ◽  
Phosphonic Acid ◽  
Acid Group ◽  
Protecting Groups ◽  
Protecting Group ◽  
Phosphonic Acids ◽  
Phosphonic Acid Group ◽  
Allyl Esters

During the synthesis of γ-lactones bearing a phosphonic acid group at the γ-position, difficulties were encountered generating the free phosphonic acids from corresponding esters. A protecting group used for carboxylic acids was adapted to phosphonic acids, making this transformation easy.

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