反应详情

温度

25 °C

tert-Butyl cis-4-(2-(5-(difluoromethoxy)-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxamido)cyclohexylcarbamate (54 mg, 0.1 mmol) in 3 mL of 1,4-dioxane was added 10 mL of concentrated HCl. The reaction mixture was stirred overnight at 25° C. After evaporation under the reduced pressure, the residue was purified by preparative-HPLC (Gemini 5u C18 150×21.2 mm; inject volume: 3 mL/inj, flow rate: 20 mL/min; wavelength: 214 nm and 254 nm; the gradient conditions are: 40% acetonitrile/60% water (0.1% trifluoroacetic acid V/V) initially, and then proceed to 50% acetonitrile/50% water (0.1% trifluoroacetic acid V/V) in a linear fashion after just 9 min). After concentration, the crude solid was treated with 1N HCl (2 mL), the mixture was stirred for 10 min then evaporated and dried to afford N-(cis-4-aminocyclohexyl)-2-(5-(difluoromethoxy)-1-methyl-1H-indazol-3-yl)-5H-pyrrolo[3,2-b]pyrazine-7-carboxamide hydrochloride (13 mg, 29.5%) as yellow solid. LCMS: (M+H)+=456; 1H NMR (300 MHz, CD3OD): δ 8.96 (s, 1H), 8.22 (s, 1H), 8.01 (d, 1H, J=2.1 Hz), 7.56 (d, 1H, J=9.0 Hz), 7.26 (dd, 1H, J1=9.0 Hz, J2=2.4 Hz), 6.76 (t, 1H, J=74.1 Hz), 4.16-4.14 (m, 1H), 4.11 (s, 3H), 3.17-3.15 (m, 1H), 2.15-2.11 (m, 2H), 1.91-1.78 (m, 4H), 1.60-1.48 (m, 2H).

1. customAfter evaporation under the reduced pressure
2. customthe residue was purified by preparative-HPLC (Gemini 5u C18 150×21.2 mm
3. wait40% acetonitrile/60% water (0.1% trifluoroacetic acid V/V) initially, and then proceed to 50% acetonitrile/50% water (0.1% trifluoroacetic acid V/V) in a linear fashion after just 9 min
4. concentrationAfter concentration
5. additionthe crude solid was treated with 1N HCl (2 mL)
6. stirringthe mixture was stirred for 10 min
7. customthen evaporated
8. customdried