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Título: A novel and efficient route for the syntheses of hydroxylated 2,3-diarylxanthones
Autor: Santos, Clementina M.M.
Silva, Artur
Cavaleiro, José
Palavras-chave: Hydroxylated diarylxanthones
Heck reaction
Phenyltrimethylammonium tribromide
Issue Date: 2007
Editora: Thieme Verlag
Citação: Santos, Clementina; Silva, Artur; Cavaleiro, José (2007) - A novel and efficient route for the syntheses of hydroxylated 2,3-diarylxanthones. Synlett. 20, p. 3113-3116
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.
Arbitragem científica: yes
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Appears in Collections:PTV - Artigos em Revistas Indexados ao ISI

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