反应详情

温度

100 °C

A mixture of 1-(5-(7-chloro-1-ethyl-2-oxo-1,2-dihydro-1,6-naphthyridin-3-yl)-2,4-difluorophenyl)-3-phenylurea (211 mg, 0.464 mmol), Cs2CO3 (453 mg, 1.392 mmol), N,N-dimethylurea (204 mg, 2.319 mmol) and Xantphos (81 mg, 0.139 mmol) in dioxane (5 mL) was sparged with Ar, treated with Pd2(dba)3 (64 mg, 0.070 mmol) and heated at 100° C. for 4 h. The mixture was cooled to RT, treated with EtOAc, DMF and 50% satd. NaHCO3 and the solids removed via filtration through diatomaceous earth. The layers of the filtrate were separated, the organic layer washed with brine, dried over Na2SO4, concentrated to dryness and purified via reverse-phase chromatography (MeCN/H2O with 0.1% TFA). The organics were removed under reduced pressure, the aqueous residue treated with satd. NaHCO3 and stirred. The resulting solid was collected via filtration and dried to afford 3-(3-(2,4-difluoro-5-(3-phenylureido)phenyl)-1-ethyl-2-oxo-1,2-dihydro-1,6-naphthyridin-7-yl)-1,1-dimethylurea (47 mg, 33% yield). 1H NMR (400 MHz, DMSO-d6): δ 9.21 (s, 1H), 9.03 (s, 1H), 8.66 (s, 1H), 8.57 (s, 1H), 8.17 (dd, J=9.1, 7.8 Hz, 1H), 8.01 (d, J=2.1 Hz, 2H), 7.45-7.38 (m, 3H), 7.26 (t, J=7.8 Hz, 2H), 6.96 (t, J=7.4 Hz, 1H), 4.18 (q, J=7.3 Hz, 2H), 2.97 (s, 6H), 1.24 (t, J=7.1 Hz, 3H); MS (ESI) m/z: 507.2 [M+H]+.

1. customwas sparged with Ar
2. temperatureThe mixture was cooled to RT
3. customNaHCO3 and the solids removed via filtration through diatomaceous earth
4. customThe layers of the filtrate were separated
5. washthe organic layer washed with brine
6. dry with materialdried over Na2SO4
7. concentrationconcentrated to dryness
8. custompurified via reverse-phase chromatography (MeCN/H2O with 0.1% TFA)
9. customThe organics were removed under reduced pressure
10. additionthe aqueous residue treated with satd
11. filtrationThe resulting solid was collected via filtration
12. customdried