反应详情

A mixture of 4-methoxy-2-methyl aniline 215f (5 g, 36.45 mmol), malonic acid (5.68 g, 54.67 mmol) in phosphorus oxide trichloride (36 mL) was refluxed for 16 hrs. The reaction mixture was then poured dropwise into cooled water (400 mL), extracted with ethyl acetate, washed with brine, dried over Na2SO4, filtered, concentrated under reduced pressure, and purified by chromatography on silica gel (DCM) to yield compound 220f as a beige solid in 43% yield. 1H NMR (CDCl3, 400 MHz) δ (ppm) 2.72 (s, 3H), 3.95 (s, 3H), 7.27-7.28 (m, 2H), 7.47 (s, 1H).

1. temperaturewas refluxed for 16 hrs
2. additionThe reaction mixture was then poured dropwise
3. extractionextracted with ethyl acetate
4. washwashed with brine
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. custompurified by chromatography on silica gel (DCM)