o-Hydroxyphenyl benzyl ketones on treatment with dimethylsulphoxide and powdered potassium hydroxide have been found to undergo facile oxidation to the corresponding benzils.
A synthesis of unsymmetrical 1,2-diarylethane-1,2-dione is reported involving the intramolecular cyclization of anionic benzylic ester of the aryl benzyl ether followed by oxidation employing dioxirane. With the use of microwave irradiation, licoagrodione was prepared from Claisen rearrangement of the corresponding allyl phenyl ether 1,2-diketone readily available from the Lindlar's reduction of the
SAXENA, S.;JAIN, P. K.;MAKRANDI, J. K.;GROVER, S. K., TETRAHEDRON LETT., 1983, 24, N 32, 3401-3402
作者:SAXENA, S.、JAIN, P. K.、MAKRANDI, J. K.、GROVER, S. K.
DOI:——
日期:——
The Reaction of 3-Hydroxyflavones with Metal Salts
作者:Mutsumi Hamado、Kazu Kurosawa
DOI:10.1246/bcsj.53.2630
日期:1980.9
The reaction of 3-hydroxyflavones (1a–d) with lead(IV) acetate gave 1,2-diphenylethanediones (2a–d), 1,2-diphenyl-2-hydroxyethanones, 2-hydroxybenzoic acids (7 and 9), and benzoic acids (8 and 10), and the reaction with manganese(III) acetate yielded 2, 7, 8, 9, and 10. In addition to 2, 7, and 10, 6-methoxy-2-(4-methoxybenzoyloxy)-3(2H)-benzofuranone and 2-hydroxy-4-methoxybenzaldehyde were obtained in the reaction of 1c with manganese(III) acetate. It has been established by the studies of 14C-labelled compounds that the C(3) in the 3-hydroxyflavone was lost during the reaction.