1984 年 104 巻 12 号 p. 1306-1308
A new preparation of flavones was discussed. Dehydrogenation of some 2'-hydroxychalcones with 2, 3-dichloro-5, 6-dicyano-1, 4-benzoquinone (DDQ) in boiling dioxane furnished the corresponding flavones and small amount of aurones.