Zobrazeno 1 - 10
of 304
pro vyhledávání: '"Pudovik"'
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 18, Iss 1, Pp 1188-1194 (2022)
Herein, we report a Lewis acid-catalyzed Pudovik reaction–phospha-Brook rearrangement sequence between diarylphosphonates or -phosphinates and α-pyridinealdehydes to access valuable phosphoric ester compounds. This transformation provides an exten
Externí odkaz:
https://doaj.org/article/b3ad3bee67ce472d84ea6d032d1e808b
Akademický článek
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Autor:
Zsuzsanna Szalai, Boldizsár Tóth, Rita Oláhné Szabó, Szilvia Bősze, Konstantin Karaghiosoff, Mátyás Czugler, László Drahos, György Keglevich
Publikováno v:
Molecules, Vol 28, Iss 16, p 6037 (2023)
New hydroxy-methylenebisphosphonic derivatives were prepared with different P-functions. The outcome of the reaction of α-oxophosphonates (YC(O)P(O)(OR)2) and dialkyl phosphites or diarylphosphine oxides depended on the Y substituent of the oxo-comp
Externí odkaz:
https://doaj.org/article/8dda46a9fa134f3399b99aa01e1966b8
Autor:
Petra R. Varga, György Keglevich
Publikováno v:
Molecules, Vol 28, Iss 16, p 6150 (2023)
α-Aminophosphonates and related compounds are important due to their real and potential biological activity. α-Aminophosphonates may be prepared by the Kabachnik–Fields condensation of oxo compounds, amines and dialkyl phosphites, or by the aza-P
Externí odkaz:
https://doaj.org/article/2f39dd3d54204db3ab46eff313f97d9e
Publikováno v:
Molbank, Vol 2022, Iss 3, p M1424 (2022)
Bisphosphonates are widely used in medicine and related areas, mainly for the treatment of bone diseases, such as osteoporosis. However, their synthesis is usually performed under harsh reaction conditions. In order to overcome this limitation, the p
Externí odkaz:
https://doaj.org/article/c832c68155c94c8e894303a220be1fce
Akademický článek
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Publikováno v:
Molecules, Vol 27, Iss 17, p 5404 (2022)
Herein, we present the application of fluorinated carbohydrate-derived building blocks for α-hydroxy β-fluoro/β-trifluoromethyl and unsaturated phosphonates synthesis. Pudovik and Horner–Wadsworth–Emmons reactions were applied to achieve this
Externí odkaz:
https://doaj.org/article/82c9f20f4f884560a3170e2f34ebdfd1
Autor:
Zsuzsanna Szalai, György Keglevich
Publikováno v:
Molecules, Vol 26, Iss 24, p 7575 (2021)
The reaction of diethyl α-oxoethylphosphonate and diethyl oxobenzylphosphonate with diethyl phosphite, dimethyl phosphite, and diphenylphosphine oxide affords, depending on the substrates and conditions (nature and quantity of the amine catalyst, te
Externí odkaz:
https://doaj.org/article/d4a4adb8a7cf44af8ee40a123decdcef
Publikováno v:
Green Processing and Synthesis, Vol 6, Iss 2, Pp 197-201 (2017)
Recent synthetic methods for α-hydroxyphosphonates comprise a green, solvent-free accomplishment of the Pudovik reaction that was typically followed by extractions and recrystallization, or even by chromatography, or other operations. We now develop
Externí odkaz:
https://doaj.org/article/8789f0590491446bbad15d421222be1d
Autor:
Erika Bálint, Ádám Tajti, Anna Ádám, István Csontos, Konstantin Karaghiosoff, Mátyás Czugler, Péter Ábrányi-Balogh, György Keglevich
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 13, Iss 1, Pp 76-86 (2017)
A family of α-aryl-α-aminophosphonates and α-aryl-α-aminophosphine oxides was synthesized by the microwave-assisted solvent-free addition of dialkyl phosphites and diphenylphosphine oxide, respectively, to imines formed from benzaldehyde derivati
Externí odkaz:
https://doaj.org/article/0eb03ff84c6f4a58b50468732c78f243