Trifluoroacetic acid → HCID 178460022, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of N-(3-(1-(4-methoxybenzyl)-3-methyl-1H-pyrazolo[3,4-b]pyridin-5-yl)phenyl)acrylamide (154) (70 mg) in CHCl3 (20 mL) was added trifluoroacetic acid (5 mL) and the reaction mixture heated at 50° C. for 12. After completion of the reaction the solvents were removed, diluted with cold water, pH was adjusted to 8 and the aqueous phase extracted with chloroform twice. The organic layer was washed with brine solution and dried over sodium sulphate and the solvent completely distilled off to get the crude product. The crude was passed through 100-200 mesh silica gel, eluting the pure compound in 60% EtOAc/hexane gave pale yellow solid compound N-(3-(3-methyl-1H-pyrazolo[3,4-b]pyridin-5-yl)phenyl)acrylamide 155. 1H NMR (400 MHz, CDCl3) δ: 10.29 (s, H), 8.75 (d, J=2.07, 1H), 8.40 (d, J=1.95, 1H), 8.03 (s, 1H), 7.69 (s, 1H), 7.43 (m, 1H), 6.50 (m, 1H), 6.46 (m, 1H), 6.26 (m, 1H), 2.55 (bs, 3H); MS m/z 277.9 (M+H)+.

Provenance & Evidence