反应详情

To a solution of 2-(1,1-dimethyl-2-hydroxyethylamino)-3-nitro-5-(trifluoromethyl)pyridine (1.2 g) in pyridine (12 mL) was added acetic anhydride (0.811 mL), and the mixture was stirred at room temperature under nitrogen atmosphere for 4 hours. The resulting mixture was concentrated in vacuo, and the residue was partitioned between ethyl acetate and water. The separated organic layer was washed successively with 1 N-hydrochloric acid, water, an aqueous saturated sodium hydrogencarbonate solution and brine. The organic layer was dried over magnesium sulfate and evaporated in vacuo to give 2-(2-acetoxy-1,1-dimethylethylamino)-3-nitro-5-(trifluoromethyl)pyridine (1.39 g) as a yellow oil.

1. concentrationThe resulting mixture was concentrated in vacuo
2. customthe residue was partitioned between ethyl acetate and water
3. washThe separated organic layer was washed successively with 1 N-hydrochloric acid, water
4. dry with materialThe organic layer was dried over magnesium sulfate
5. customevaporated in vacuo