Abstract
Syntheses of hydroxyl derivatives of 2-methyl-5, 6-bezochromone were investigated, and following benzochromone derivatives were obtained together with related compounds, and physical and chemical properties of these chromones were characterized : 2-Methyl-8-methoxy-5, 6-benzochromone (IV), 2-methyl-7-methoxy-5, 6-benzochromone (X), 2-methyl-7, 8-dimethoxy-5, 6-benzochromone (XIV), 2-methyl-3-acetyl-8-methoxy-5, 6-benzochromone (XXV), 2-methyl-3-acetyl-7-methoxy-5, 6-benzochromone (XXII), and 2-methyl-3-acetyl-7, 8-dimethoxy-5, 6-benzochromone (XXIII). Hydroxylation of 2-methyl-8-hydroxy-5, 6-benzochromone (III) or 2-methyl-7-hydroxy-5, 6-benzochromone (V) gave 2-methyl-7, 8-dihydroxy-5, 6-benzochromone (XX) from both.
