反应详情

To a solution of 2-(2-isopropylphenyl)imino-5,5-dimethyl-1,3-thiazine (0.26 g) in N,N-dimethylformamide (2 ml) was added under ice-cooling 60% sodium hydride (0.05 g). The mixture was stirred for 30 minutes. Ethyliodide (0.17 g) was added thereto. The mixture was stirred at room temperature for 2 hours. To a reaction mixture was added water (30 ml), extracted with diethylether (60 ml), dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (n-hexane/ethyl acetate) to give 3-ethyl-2-(2-isopropylphenyl)imino-5,5-dimethyl-1,3-thiazine (0.21 g, yield: 71%) as colorless oil.

1. stirringThe mixture was stirred at room temperature for 2 hours
2. extractionextracted with diethylether (60 ml)
3. dry with materialdried over anhydrous magnesium sulfate
4. concentrationconcentrated under reduced pressure
5. customThe obtained residue was purified by silica gel column chromatography (n-hexane/ethyl acetate)