反应详情

To a stirring solution of crude 2-(5-(4-t-butylphenylsulfonamido)-1-(quinolin-5-yl)-1H-pyrazol-3-yl)acetamide (0.03 g, 0.07 mmol) and phosphorus(V) oxide chloride (POCl3, 0.5 mL, 5.4 mmol) was heated at 100° C. for 30 min. After cooling to room temperature, the reaction mixture was concentrated in vacuo. Aqueous saturated sodium bicarbonate was added to the resulting residue and extracted with 2:1 chloroform/iPrOH. The organic layer was dried (Na2SO4), filtered, and concentrated in vacuo. The crude product was purified by reverse phase HPLC(C18 column, acetonitrile-H2O with 0.1% TFA as eluent) to give the title compound as a white solid (0.006 g, 0.013 mmol, 19%). 1H NMR (400 MHz, CD3OD) δ 8.86 (dd, J=2.0, 4.4 Hz, 1H), 8.12 (d, J=8.4 Hz, 1H), 7.77 (dd, J=7.2, 8.4 Hz, 1H), 7.68 (d, J=8.4 Hz, 1H), 7.55-7.53 (m, 2H), 7.45-7.42 (m, 3H), 7.34 (dd, J=1.2, 7.2 Hz, 1H), 6.21 (s, 1H), 3.88 (s, 2H), 1.35 (s, 9H); MS: (ES) m/z calculated for C24H24N5O2S [M+H]+ 446.2. found 446.3.

1. concentrationthe reaction mixture was concentrated in vacuo
2. additionAqueous saturated sodium bicarbonate was added to the resulting residue
3. extractionextracted with 2:1 chloroform/iPrOH
4. dry with materialThe organic layer was dried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe crude product was purified by reverse phase HPLC(C18 column, acetonitrile-H2O with 0.1% TFA as eluent)