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- W2324574835 abstract "2,2a-Dihydro-1H,8H-azeto[2,1-b][1,3]benzoselenazin-1-one (12), 5-selena-1-azabicyclo[4.2.0]oct-3-en-8-one (13), ethyl 1-aza-7-oxo-4-selenabicyclo[3.2.0]heptane-2-carboxylate (16), and benzoselenopenem (33) can be prepared in 39–85% yield through the intramolecular homolytic substitution of aryl, vinyl or alkyl radicals at the selenium atom in suitably-substituted 4-benzylseleno-β-lactams, or through intramolecular nucleophilic substitution by the benzylseleno moiety in 4-halo-β-lactam precursors. Application of this chemistry to the preparation of optically active selenium-containing analogues of β-lactam antibiotics is also detailed." @default.
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- W2324574835 date "2004-01-01" @default.
- W2324574835 modified "2023-09-26" @default.
- W2324574835 title "Preparation of novel selenapenams and selenacephems by nucleophilic and radical chemistry involving benzyl selenides" @default.
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- W2324574835 doi "https://doi.org/10.1039/b409242b" @default.
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