反应详情

Acetyl nitrate obtained by mixing acetic anhydride (3.6 g, 36 mmol) with fuming nitric acid (2.16 g, 36 mmol) at 0° C. was dropped into a solution of dimethyl 3-hydroxyphthalate (3.8 g, 18 mmol) in acetonitrile (60 ml) at 0° C. followed by stirring for 40 minutes. The reaction solution was diluted with water and extracted with ether. The organic layer was washed with water and a saturated sodium chloride solution successively and dried over anhydrous magnesium sulfate and the solvent was evaporated therefrom. A 3:2 mixture (4.34 g; yield 94%) of dimethyl 3-hydroxy-4-nitrophthalate and dimethyl 3-hydroxy-6-nitrophthalatewas obtained as a yellow solid. This was used in the next reaction without separation and purification.

1. extractionextracted with ether
2. washThe organic layer was washed with water
3. dry with materiala saturated sodium chloride solution successively and dried over anhydrous magnesium sulfate
4. customthe solvent was evaporated