反应详情

To a solution of 4-(2-methyl,5-nitroanilino)-2-(4-pyridinyl)-6-(trifluoromethyl)pyrimidine (377 mg, 1.00 mmol) in anhydrous ethanol (20 ml) was added slowly anhydrous tin chloride (758 mg, 4.00 mmol). The mixture was refluxed for 1 h and then rotary evaporated to leave a brown oil. The brown oil was basified with aqueous 2N NaOH to give a final pH of 8. The resulting precipitate was filtered and washed with ethyl acetate. The aqueous phase and organic phase was combined and washed with water (1×20 ml) and dried over anhydrous sodium sulfate. The ethyl acetate solution was rotary evaporated to dryness to give a brown solid (212 mg, 57%). 1H NMR (CDCl3): 8.76 (dd, J=1.8, 4.8 Hz, 2H), 8.26 (dd, J=1.8, 4.8 Hz, 2H), 7.11 (d, J=7.8 Hz, 1H), 7.12 (s, 1H), 6.69 (d, J=2.4 Hz, 1H), 6.66 (s, 1H), 6.63 (dd, J=2.4, 8.1 Hz, 1H), 3.72 (bs, 2H), 2.16 (s, 3H).

1. temperatureThe mixture was refluxed for 1 h
2. customrotary evaporated
3. customto leave a brown oil
4. customto give a final pH of 8
5. filtrationThe resulting precipitate was filtered
6. washwashed with ethyl acetate
7. washwashed with water (1×20 ml)
8. dry with materialdried over anhydrous sodium sulfate
9. customThe ethyl acetate solution was rotary evaporated to dryness