反应详情

The compound of Example 2 (3.6 g, 0.011 mole) and chloroacetic acid (2.04 g, 0.022 mole) were added to t-butyl alcohol (40 ml) to which had been added potassium (1.39 g, 0.033 mole) and the reaction mixture was refluxed for 36 hours. The reaction mixture was cooled to room temperature, and 1 N hydrochloric acid (50 ml) was added slowly. The reaction mixture was extracted twice with 100 ml of diethyl ether. The combined diethyl ether extracts were washed with saturated sodium bicarbonate (2×100 ml), 1 N hydrochloric acid (10 ml) and brine (20 ml) dried over anhydrous sodium sulfate, filtered and concentrated in a rotary evaporator to give the crude product as an oil. The product was purified by silica gel chromatography and recrystallized from ethyl acetate-hexane. The structure was supported by NMR and infrared spectroscopy and elemental analysis.

1. temperaturethe reaction mixture was refluxed for 36 hours
2. extractionThe reaction mixture was extracted twice with 100 ml of diethyl ether
3. washThe combined diethyl ether extracts were washed with saturated sodium bicarbonate (2×100 ml), 1 N hydrochloric acid (10 ml) and brine (20 ml)
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in a rotary evaporator