Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Nikoletta Harsági"'
Publikováno v:
Molecules, Vol 27, Iss 15, p 4674 (2022)
The microwave (MW)-assisted direct esterification of certain P-acids is a green method. Quantum chemical calculations revealed that the activation enthalpy (ΔH#) for the exothermic monoalkylphosphate → dialkylphosphate transformation was on the av
Externí odkaz:
https://doaj.org/article/d11bb555c2b544ae8b93f4bcdad161b8
Publikováno v:
Molecules, Vol 26, Iss 17, p 5303 (2021)
It is well-known that the P-acids including phosphonic acids resist undergoing direct esterification. However, it was found that a series of alkylphoshonic acids could be involved in monoesterification with C2–C4 alcohols under microwave (MW) irrad
Externí odkaz:
https://doaj.org/article/f2ab25d63051432095a9584a2bbe2692
Autor:
Nikoletta Harsági, György Keglevich
Publikováno v:
Molecules, Vol 26, Iss 10, p 2840 (2021)
Phosphinic and phosphonic acids are useful intermediates and biologically active compounds which may be prepared from their esters, phosphinates and phosphonates, respectively, by hydrolysis or dealkylation. The hydrolysis may take place both under a
Externí odkaz:
https://doaj.org/article/034abdba6e044b8e85066f58f93bf47e
Publikováno v:
Molecules, Vol 25, Iss 17, p 3793 (2020)
The two-step acidic hydrolysis of α-hydroxybenzylphosphonates and a few related derivatives was monitored in order to determine the kinetics and to map the reactivity of the differently substituted phosphonates in hydrolysis. Electron-withdrawing su
Externí odkaz:
https://doaj.org/article/1982bb6ae4fa49e995902e6301de8508
Publikováno v:
Synthesis. 54:3047-3054
It is a reasonable endeavour to replace P-chloride starting materials (e.g., POCl3) with greener and cheaper reagents. Our purpose was to start from phosphorus pentoxide, i.e. to utilize its reaction with alcohols in the preparation of (HO)2P(O)(OR)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a27bce01b46e8408b2ae0b76fa865f7
https://doi.org/10.1055/a-1811-8586
https://doi.org/10.1055/a-1811-8586
MW-assisted hydrolysis of phosphinates in the presence of PTSA as the catalyst, and as a MW absorber
Autor:
Nikoletta Harsági, György Keglevich
Publikováno v:
Green Processing and Synthesis. 11:176-183
The hydrolysis of phosphinic esters is an important transformation that may be performed under acidic or basic conditions on conventional heating. A series of cyclic phosphinates, 1-alkoxy-3-methyl or 3,4-dimethylphospholane oxides, has now been hydr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7a5f325d6a3dab010ad393d5466bed5
https://doi.org/10.1515/gps-2022-0012
https://doi.org/10.1515/gps-2022-0012
Publikováno v:
ChemPlusChem. 88
Monoalkyl phosphonic derivatives obtained by the microwave (MW)- and ionic liquid-promoted direct esterification of alkylphosphonic acids were converted to the corresponding dialkyl alkylphosphonates on reaction with alkyl halides in the presence of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::95c1ffc45d1b1da314750915e3b8e0c0
https://doi.org/10.1002/cplu.202200342
https://doi.org/10.1002/cplu.202200342
Autor:
György Keglevich, Nikoletta Harsági, Petra R. Varga, Bianka Huszár, Réka Henyecz, Nóra Z. Kiss, Zoltán Mucsi, Péter Bagi
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 197:420-425
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34612b16deee867f732858479275fcff
https://doi.org/10.1080/10426507.2021.1990924
https://doi.org/10.1080/10426507.2021.1990924
Publikováno v:
Synthesis. 54:3899-3905
A series of 1-alkoxy-3-methyl- and 3,4-dimethyl-3-phospholene 1-oxides, as well as 1-alkoxy-3-methylphospholane 1-oxides were prepared in good yields by the microwave (MW)-assisted [bmim][PF6]-catalyzed transesterification of the corresponding methyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::773f50cdbc7c436bcf422fa2fbb641e1
https://doi.org/10.1055/a-1504-8924
https://doi.org/10.1055/a-1504-8924
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 197:551-553
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0a97447bcf4c119fce4b0972dd92c2a
https://doi.org/10.1080/10426507.2021.2011878
https://doi.org/10.1080/10426507.2021.2011878