反应详情

温度

0 °C

An ice-cold solution of methane sulfonyl chloride (18 μL, 0.23 mmol) in DMA (2.0 mL) was stirred for 10 min followed by sequential drop wise addition of a solution of 6-(3-ethylureido)-4-(phenylamino)nicotinic acid (50 mg, 0.16 mmol) in DMA (5.0 mL) and 2,6-lutidine (55 μL, 0.46 mmol). The resulting reaction mixture was stirred at 0° C. for 30 min followed by addition of a solution of 2-trifluoromethyl aniline (31 μL, 0.25 mmol) in DMA (1.0 mL). The reaction mass was further stirred at RT ° C. for 10 min and then heated at 50° C. for 4 h. The reaction mass was then cooled to 0-5° C. and quenched with H2O (5.0 mL), followed by addition of conc. HCl (0.50 mL). The resulting solution was stirred for 5 min followed by extraction with EtOAc (3×50 mL). The combined organic phase was washed with brine, dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure. The residue was purified via preparative TLC to obtain Compound 11 (5.0 mg, 8%). 1H NMR (300 MHz, DMSO-d6): δ 10.23 (br s, 1H), 10.07 (br s, 1H), 9.12 (br s, 1H), 8.61 (s, 1H), 7.89 (m, 1H), 7.82 (d, J=8.0 Hz, 1H), 7.74 (m, 1H), 7.57 (m, 2H), 7.38-7.43 (m, 2H), 7.31 (s, 1H), 7.25 (m, 2H), 7.15 (m, 1H), 3.14 (m, 2H) and 1.06 (t, J=7.20 Hz, 3H). [M+H]+ m/z=444.17.

1. customThe resulting reaction mixture
2. stirringThe reaction mass was further stirred at RT ° C
3. waitfor 10 min
4. temperatureheated at 50° C. for 4 h
5. temperatureThe reaction mass was then cooled to 0-5° C.
6. customquenched with H2O (5.0 mL)
7. additionfollowed by addition of conc. HCl (0.50 mL)
8. stirringThe resulting solution was stirred for 5 min
9. extractionfollowed by extraction with EtOAc (3×50 mL)
10. washThe combined organic phase was washed with brine
11. dry with materialdried over anhydrous Na2SO4
12. filtrationfiltered
13. concentrationconcentrated under reduced pressure
14. customThe residue was purified via preparative TLC