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|Title:||A novel and efficient route for the syntheses of hydroxylated 2,3-diarylxanthones|
|Author:||Santos, Clementina M.M.|
|Citation:||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|
|Abstract:||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.|
|Appears in Collections:||PTV - Artigos em Revistas Indexados ao ISI/Scopus|
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