反应详情

温度

60 °C

To a stirred solution of 1-(4-methoxybenzyl)-3-methyl-N-(4-((4-methylpiperazin-1-yl)methyl)phenyl)-1H-pyrazolo[3,4-b]pyridin-5-amine (166) (40 mg, 0.657 mmol) in CHCl3 (10 mL) was added trifluoroacetic acid (6 mL) and the reaction mass heated at 60° C. overnight. After completion of the reaction the solvents were completely distilled off and diluted with water and the pH was adjusted to 9 and extracted with chloroform twice. The combined organic layer was washed with brine solution and dried over sodium sulphate and the solvents were removed and the crude material was passed through 100-200 mesh silica gel, eluting with 8% MeOH/CH2Cl2 obtained pure 3-methyl-N-(4-((4-methylpiperazin-1-yl)methyl)phenyl)-1H-pyrazolo[3,4-b]pyridin-5-amine 167 as a pale yellow colored solid (10 mg). 1H NMR (400 MHz, CDCl3) δ: 8.38 (s, 1H), 7.76 (s, 1H), 7.52 (s, 1H), 7.21 (d, 1H), 7.19 (d, J=8.41, 1H), 7.19 (s, 1H), 6.89 (d, J=7.92, 1H), 3.46 (s, 2H), 2.54 (m, 8H), 2.31 (s, 3H), 2.05 (s, 3H); MS m/z 336.9 (M+H)+.

1. customAfter completion of the reaction the solvents
2. distillationwere completely distilled off
3. additiondiluted with water
4. extractionextracted with chloroform twice
5. washThe combined organic layer was washed with brine solution
6. dry with materialdried over sodium sulphate
7. customthe solvents were removed
8. washeluting with 8% MeOH/CH2Cl2 obtained pure 3-methyl-N-(4-((4-methylpiperazin-1-yl)methyl)phenyl)-1H-pyrazolo[3,4-b]pyridin-5-amine 167 as a pale yellow colored solid (10 mg)