Artículo
Photochemistry of N-(selenoalkyl)-phthalimides. Formation of N, Se-heterocyclic systems
Oksdath Mansilla, Gabriela
; Heredia, Adrián Alberto
; Argüello, Juan Elias
; Peñeñory, Alicia Beatriz
Fecha de publicación:
04/2015
Editorial:
Royal Society of Chemistry
Revista:
Photochemical and Photobiological Sciences
ISSN:
1474-905X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A variety of N-(selenomethyl)alkyl-phthalimides (alkyl = -(CH2)n-; n = 2-5, 1a, b, d, e) and N-(selenobenzyl)propyl phthalimide (1c) were synthesized and their photochemistry was studied at λ = 300 nm. Steady-state photolysis and laser time-resolved spectroscopy studies confirmed that these reactions proceeded by direct or acetone-sensitized excitation followed by intramolecular electron transfer (ET) between Se atom and the phthalimide moiety. Two main pathways are possible after ET: proton transfer to the ketyl radical anion from the CH3Se+ or the -CH2Se+- moieties, yielding the corresponding biradicals. Collapse of these biradicals yields cyclization products with the respective endo or exo selenium-containing heterocycles. Competition between both proton transfer processes depends on the chain length of the alkyl spacer between the phthalimide and Se groups as well as the size of the cycle being formed.
Palabras clave:
Photochemistry
,
Cycloaddition
,
Heterocycles
,
Radical Cation
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Articulos(INFIQC)
Articulos de INST.DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Articulos de INST.DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Citación
Oksdath Mansilla, Gabriela; Heredia, Adrián Alberto; Argüello, Juan Elias; Peñeñory, Alicia Beatriz; Photochemistry of N-(selenoalkyl)-phthalimides. Formation of N, Se-heterocyclic systems; Royal Society of Chemistry; Photochemical and Photobiological Sciences; 14; 4; 4-2015; 726-736
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