Year 2021

• Atom-economic thiophosphoroselenenylations of C–H acid esters and amides

  Publication

  • A. Majewski
  • W. Przychodzeń

  - SYNTHETIC COMMUNICATIONS - Year 2021

  Three improved thiophosphoroselenenylation procedures of CHacids, including derivatives of malonic and acetyl-, phosphono-, 4-nitrophenyl- and 3-pyridylacetic acids, have been described and compared to previously reported thiophosphoroselenylation of diethyl malonate using bis(disopropoxyphosphinothioyl)diselenide alone or with the aid of methyl iodide. The use of iodine makes it possible to utilize both equivalents of the selenenylating...

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• Unexpected Z/E isomerism of N-methyl-O-phosphothioyl benzohydroxamic acids, their oxyphilic reactivity and inertness to amines

  Publication

  • A. Majewski
  • J. Chojnacki
  • W. Przychodzeń

  - STRUCTURAL CHEMISTRY - Year 2021

  Thiophosphinoylation of N-methyl p-substituted benzohydroxamic acids using disulfanes (method A) or diphenylphosphinothioyl chloride (method B) provides only one conformer of the respective O-phosphothioyl derivative (Xray and NMR analysis). Undergoing the P-transamidoxylation reaction is an evidence of the reversibility of thiophosphinoylation. Only those products containing strong EWG substituents in the aroyl residue or bulky...

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Year 2011

• Efficient Selenenylation of Malonates Using Bis(phosphorothioyl) Diselenide

  Publication

  • A. Majewski
  • W. Przychodzeń
  • J. Rachoń

  - PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS - Year 2011

  Bis(O,O-diisopropoxyphosphinothioyl) diselenide reacts readily and quickly with the sodium salt of malonates to give quantitatively stable sodium 2-(O,O-diisopropyl phosphorothioselenenyl)propanedioates. No traces of the corresponding C,C-diselenenylation products were detected. A standard aqueous workup procedure affords the products, albeit in poor yield (about 45%). It was proved that the reaction is reversible due to the presence...

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Year 2010

• Efektywna metoda selenenylowania z użyciem diselenidu O,O-diizopropylofosforotioilowego

  Publication

  • A. Majewski
  • W. Przychodzeń
  • J. Rachoń

  - CHEMIK nauka-technika-rynek - Year 2010

  Tworzenie wiązania C-Se odbywa się zwykle z wykorzystaniem elektrofilowego bromku fenyloselenenylowego generowanego in situ z diselenidu difenylowego. Fenyloselenenylowanie soli sodowych malonianów, użytych z 10-krotnym nadmiarem, prowadzi do powstawania znaczących ilości di(fenyloselenenylo)malonianów obok głównych produktów mono-selenenylowania. 2-Fenyloselenenylomaloniany wykorzystano m.in. w reakcji rodnikowej addycji do wiązania...