反应详情

1M Bromo(phenyl)magnesium in THF (823.2 μL, 0.8232 mmol) was added dropwise to a stirred solution of 3-amino-6-(4-isopropylsulfonylphenyl)-N-methoxy-N-methyl-pyrazine-2-carboxamide (100 mg, 0.2744 mmol) in anhydrous THF (6 mL) at −78° C. under an atmosphere of nitrogen. The reaction was stirred at this temperature for 30 minutes then allowed to warm to ambient temperature over 16 hours. The reaction mixture was concentrated in vacuo and residue was partitioned between DCM and water. The layers were separated and the organic extract was dried (MgSO4) and concentrated in vacuo. The material was purified by reverse phase preparative HPLC [Waters Sunfire C18, 10 μM, 100 Å 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 collected, and freeze-dried to give the title compound as a yellow solid (49 mg, 42% Yield). NMR (400.0 MHz, DMSO) δ 1.16 (d, 6H), 3.44 (sept, 1H), 7.55-7.59 (m, 2H), 7.66 (m, 1H), 7.90 (d, 2H), 7.95-7.97 (m, 2H), 8.07 (br s, 2H), 8.18 (d. 2H) and 9.10 (s, 1H) ppm; (ES+) 382.0.

1. concentrationThe reaction mixture was concentrated in vacuo and residue
2. customwas partitioned between DCM and water
3. customThe layers were separated
4. extractionthe organic extract
5. dry with materialwas dried (MgSO4)
6. concentrationconcentrated in vacuo
7. customThe material was purified by reverse phase preparative HPLC [Waters Sunfire C18, 10 μM, 100 Å column, gradient 10%-95% B (solvent A: 0.05% TFA in water; solvent B: CH3CN) over 16 minutes at 25 mL/min]
8. customThe fractions were collected
9. customfreeze-dried