反应详情

To 30 ml of concentrated hydrochloric acid was added 2.0 g of methyl [2-(5-acetylamino-2-amino-4-fluorophenoxy)phenoxy]acetate, and the mixture was stirred at room temperature for 1 hour. Then, an aqueous solution consisting of 0.42 g of sodium nitrite and 3 ml of water was added under ice cooling. After stirring at the same temperature for 1 hour, 40 ml of t-butyl methyl ether was added and 0.85 g of copper (I) chloride was added. After stirring for 30 minutes, water was added, and the mixture was extracted with t-butyl methyl ether. The organic layer was washed with water, dried over magnesium sulfate, and then concentrated. The residue was subjected to column chromatography (eluent: hexane/ethyl acetate=2/1) to give 0.52 g of methyl [2-(5-acetylamino-2-chloro-4-fluorophenoxy)phenoxy]acetate.

1. additionwas added under ice cooling
2. stirringAfter stirring at the same temperature for 1 hour
3. stirringAfter stirring for 30 minutes
4. extractionthe mixture was extracted with t-butyl methyl ether
5. washThe organic layer was washed with water
6. dry with materialdried over magnesium sulfate
7. concentrationconcentrated