873842-68-3Relevant articles and documents
Preparation of 4,6,3',4'-tetrasubstituted aurones via aluminium oxide-catalyzed condensation
Bolek, David,Guetschow, Michael
, p. 1399 - 1403 (2005)
4,6,3',4'-Tetrasubstituted aurones were prepared by a protection- deprotection route with an alumina-catalyzed condensation of 3(2H)-benzofuranones with substituted aldehydes as the key step. Aureusidin (6) was obtained by demethylation of 4,6,3',4'-tetramethoxyaurone (5), a natural product from Cyperus capitatus. 4,6,3',4'-Tetrabenzyloxyaurone (9) was converted in a one hydrogenation-deprotection step to dihydroaureusidin (10).