反应详情

5-Bromo-3-(6-methyl-1H-benzimidazol-2-yl)pyrazin-2-amine (50 mg, 0.1644 mmol), Et3N (166.4 mg, 229.2 μL, 1.644 mmol), iodocopper (31.3 mg, 0.1644 mmol), Pd(PPh3)4 (9.5 mg, 0.0082 mmol) and the relevant prop-2-ynylurea (24.2 mg, 0.2466 mmol) in DMF (2 mL) were heated at 100° C. for 30 minutes under microwave conditions. The reaction mixture was purified directly by reverse phase preparative HPLC [Waters Sunfire C18, 10 mM, 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 an yellow solid (43.3 mg, 82% Yield). 1H NMR (400.0 MHz, DMSO) δ 2.45 (3H, s), 4.7 (2H, s), 6.1 (1H, s), 7.1-7.15 (1H, m), 7.4 (1H, vbr s), 7.6 (1H, vbr s), 7.85 (2H, s), 8.65 (1H, s), 9.5-9.7 (2H, m), 10.6 (1H, br s); MS (ES+) 332.

1. customThe reaction mixture was purified directly by reverse phase preparative HPLC [Waters Sunfire C18, 10 mM, 100 Å column, gradient 10%-95% B (solvent A: 0.05% TFA in water; solvent B: CH3CN) over 16 minutes at 25 mL/min]
2. customThe fractions were collected
3. customfreeze-dried