反应详情

A solution of ethyl 2,4-dichloro-6-methyl-3-pyridinecarboxylate (1.00 g, 4.27 mmol) in ethanol (20.0 mL) was treated with (3,3-dimethylbutyl)amine (0.570 mL, 4.27 mmol). The mixture was refluxed for 2 days, and upon cooling, diluted with ethyl acetate and washed with saturated aqueous sodium bicarbonate. The aqueous layer was extracted twice with ethyl acetate. The combined organic portions were dried over magnesium sulfate, filtered, concentrated in vacuo, and purified via flash column chromatography (20-60% ethyl acetate in hexanes) to afford the title compound as an amber oil (1.02 g, 80%). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 6.94 (t, J=4.4 Hz, 1H), 6.18 (s, 1H), 4.23 (q, J=7.2 Hz, 2H), 2.82-3.17 (m, 2H), 2.25 (s, 3H), 1.35-1.54 (m, 2H), 1.25 (t, J=7.1 Hz, 3H), 0.84 (s, 9H). MS(ES+) m/e 299 [M+H]+.

1. temperatureThe mixture was refluxed for 2 days
2. temperatureupon cooling
3. washwashed with saturated aqueous sodium bicarbonate
4. extractionThe aqueous layer was extracted twice with ethyl acetate
5. dry with materialThe combined organic portions were dried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. custompurified via flash column chromatography (20-60% ethyl acetate in hexanes)