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

Arkadiusz Majewski; Witold Przychodzeń

doi:10.1080/00397911.2021.1971719

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

Abstract

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 agent. The procedures work well for the majority of nucleophiles in a pKa range between more acidic malononitrile or Meldrum acid and less acidic phenylacetates. The reaction carried out on diethyl malonate in boiling rectified ethanol yields selenoacetate, which cannot be obtained by direct phosphoroselenenylation. Crystal structure of one of the selenomalonamides confirms the stabilization effects of both carbonyl oxygens on selenium atom. The P-Se bond splitting, using TBAF in 3-molar excess in the presence of alkylating agent yields the respective C,Se-dialkyl derivatives.

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Authors (2)

Arkadiusz Majewski
- aCSL Behring Lengnau AG, Lengnau, BE, Switzerland
Witold Przychodzeń dr hab. inż.

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DOI:: Digital Object Identifier (open in new tab) 10.1080/00397911.2021.1971719
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Category:: Articles
Type:: artykuły w czasopismach
Published in:: SYNTHETIC COMMUNICATIONS no. 51, pages 3390 - 3402,
ISSN: 0039-7911
Language:: English
Publication year:: 2021
Bibliographic description:: Majewski A., Przychodzeń W.: Atom-economic thiophosphoroselenenylations of C–H acid esters and amides// SYNTHETIC COMMUNICATIONS -Vol. 51,iss. 22 (2021), s.3390-3402
DOI:: Digital Object Identifier (open in new tab) 10.1080/00397911.2021.1971719
Verified by:: Gdańsk University of Technology