Perchloric Acid → HCID 178496339, compound

Participants

Reaction Steps

To {2-dimethylcarbamoyl-4-[3-(2-methoxy-phenyl)-1-(2-trimethylsilanyl-ethoxy-methyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-carbamic acid 2-methoxy-ethyl ester (53 mg, 0.084 mmol) was added 5% v/v 70% perchloric acid in acetic acid (0.5 mL) and the resulting solution was agitated for 60 min. Saturated sodium bicarbonate (2 mL) was added and the resulting mixture was extracted with ethyl acetate (3×2 mL). The combined organic layers were concentrated and the residue was purified by mass-triggered reverse-phase HPLC to give {2-dimethylcarbamoyl-4-[3-(2-methoxy-phenyl)-1H-pyrazolo[3,4-b]pyridin-5-yl]-phenyl}-carbamic acid 2-methoxy-ethyl ester as a white solid (23 mg, 55%). MS: m/z 490 (M+H+). 1H NMR (500 MHz, DMSO-d6) δ 3.00 (s, 6H), 3.33 (s, 3H), 3.60 (t, 2H), 3.86 (s, 3H), 4.23 (t, 3H), 7.11 (t, 1H), 7.22 (d, 1H), 7.46 (t, 1H), 7.62 (s, 1H), 7.69 (d, 1H), 7.75 (d, 1H), 7.85 (d, 1H), 8.31 (s, 1H), 8.82 (s, 1H), 13.42 (br, 1H).

Provenance & Evidence