反应详情

To a solution of 3,4-dimethoxy-6-(2-bromoisonicotinoyl)benzaldehyde (8.61 g) in dioxane (120 ml) is added dropwise a solution of resorcinol (3.25 g) in acetate buffer (pH 3.8, 60 ml) at room temperature. To the mixture is Gradually added dropwise an aqueous solution of sodium hypochlorite (3.1 g) in water (30 ml), and the mixture is stirred at room temperature for two hours. The pH value of the reaction mixture is adjusted to about pH 1 with conc. hydrochloric acid, and then extracted with chloroform. The extract is washed, dried, and concentrated to give 3,4-dimethoxy-6-(2-bromoisonicotinoyl)benzoic acid (8.07 g).

1. extractionextracted with chloroform
2. washThe extract is washed
3. customdried
4. concentrationconcentrated