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A novel and efficient route for the syntheses of hydroxylated 2,3-diarylxanthones

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Resumo:A novel, efficient and general route for the synthesis of hy-droxylated 2,3-diarylxanthones is described. 3-Bromo-2-styrylchromones, the key intermediate of this synthesis, is obtained by a Baker-Venkataraman rearrangement of appropriate 2’-cinnamoyloxyacetophenones, followed by a one-pot reaction with phenyltrimethylammonium tribromide. The Heck reaction of these bromochromones with substituted styrenes gives methoxylated 2,3-diarylxanthones. The cleavage of the methyl groups with BBr3 gives the desired hydroxylated 2,3-diarylxanthones.
Autores principais:Santos, Clementina M.M.
Outros Autores:Silva, Artur; Cavaleiro, José
Assunto:Hydroxylated diarylxanthones 3-bromo-2-styrylchromones Heck reaction Phenyltrimethylammonium tribromide Demethylation
Ano:2007
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Instituto Politécnico de Bragança
Idioma:inglês
Origem:Biblioteca Digital do IPB

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