反应详情

N-tert-Butyl-2-(6-(methylsulfonyl)pyridin-3-ylamino)-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (97 mg, 187 μmol) was dissolved in dichloromethane (2.88 mL) and treated with trifluoroacetic acid (426 mg, 288 μL, 3.74 mmol). The mixture was stirred at room temperature for 16 h. The mixture was concentrated then re-dissolved in dichloromethane (3 mL), methanol (1.5 mL) and ammonium hydroxide (0.5 mL) and the mixture stirred at room temperature for 1 h. The mixture was concentrated in vacuo then triturated with water and filtered. The solid obtained was washed with ether then dried to give N-tert-butyl-2-(6-(methylsulfonyl)pyridin-3-ylamino)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamide (71 mg, 183 μmol, 98%) as a yellow solid. 1H NMR (400 MHz, DMSO-d) δ ppm: 12.51 (s, 1H), 10.26 (s, 1H), 8.99 (d, J=2.5, 1 H), 8.37 (dd, J=8.4, 2.7, 1 H), 8.14 (s, 1H), 8.11 (s, 1H), 7.92 (d, J=8.7, 1 H), 7.62 (s, 1H), 3.21 (s, 3H), 1.45 (s, 9H); MS (EI/CI) m/z: 389.2 [M+H].

1. concentrationThe mixture was concentrated
2. dissolutionthen re-dissolved in dichloromethane (3 mL)
3. stirringmethanol (1.5 mL) and ammonium hydroxide (0.5 mL) and the mixture stirred at room temperature for 1 h
4. concentrationThe mixture was concentrated in vacuo
5. customthen triturated with water
6. filtrationfiltered
7. customThe solid obtained
8. washwas washed with ether
9. customthen dried