反应详情

温度

70 °C

A mixture of 3-amino-6-(4-ethylsulfonylpiperazin-1-yl)pyrazine-2-carbonyl chloride (100 mg, 0.2996 mmol) and 2-aminobenzenethiol (112.5 mg, 96.98 μL, 0.8988 mmol) in acetonitrile was heated at 70° C. overnight. The reaction mixture was allowed to cool to RT, filtered and the resultant residue was purified by reverse phase preparative HPLC [Waters Sunfire C18, 10 uM, 100A column, gradient 10%-95% B (solvent A: 0.05% TFA in water, solvent B: CH3CN) over 16 minutes at 25 mL/min]. The fractions were combined but still contained an impurity. The mixture was therefore purified on silica gel by flash column chromatography (50% EtOAc/Hexanes) to afford the title compound as a bright orange solid (23.2 mg, 20% Yield). 1H NMR (400.0 MHz, DMSO) d 1.24 (3H, t), 3.12 (2H, q), 3.36 masked signal, 3.54 (4H, m), 7.39 (2H, br s), 7.44-7.48 (1H, d), 7.52-7.57 (1H, d), 8.06 (1H, m), 8.11 (1H, m), 8.24 (1H, s) ppm; MS (ES+) 405

1. temperatureto cool to RT
2. filtrationfiltered
3. customthe resultant residue was purified by reverse phase preparative HPLC [Waters Sunfire C18, 10 uM, 100A column, gradient 10%-95% B (solvent A: 0.05% TFA in water, solvent B: CH3CN) over 16 minutes at 25 mL/min]
4. customThe mixture was therefore purified on silica gel by flash column chromatography (50% EtOAc/Hexanes)