反应详情

To a solution of compound 267a (3.4 g, 1.2 eq.) in dioxane (60 mL) was added 6-acetyl-2-chloro-3-methoxy aniline 201d (3.01 g, 1 eq.) in dioxane. The mixture was stirred at room temperature overnight. Water was added and the mixture was extracted with ethyl acetate. The organic layer was dried over Na2SO4, filtered, and concentrated under vacuum. The residue was purified by chromatography on silica gel (petroleum ether/ethyl acetate) to yield compound 268a as a brown solid in 66% yield. 1H NMR (CDCl3, 400 MHz): δ (ppm) 1-1.06 (m, 4H), 2.08-2.15 (m, 1H), 2.58 (s, 3H), 3.99 (s, 3H), 6.87 (d, J=8.78 Hz, 1H), 7.16 (s, 1H), 7.67 (d, J=8.78 Hz, 1H), 10.27 (br s, 1H); MS (ESI, EI+): m/z=351 (MH+).

1. extractionthe mixture was extracted with ethyl acetate
2. dry with materialThe organic layer was dried over Na2SO4
3. filtrationfiltered
4. concentrationconcentrated under vacuum
5. customThe residue was purified by chromatography on silica gel (petroleum ether/ethyl acetate)