反应详情

To a solution of 5-bromo-2,4-dichloropyrimidine (45.6 g, 200 mmol) in dioxane (400 mL) was added N-cyclopentylamine (20.4 g, 240 mmol) at room temperature. The mixture thus obtained was stirred at room temperature for 6 h. The reaction mixture was then diluted with ethyl acetate and washed with brine and dried over MgSO4. The solvent was evaporated to give the title compound as a light yellow solid (56 g, 100%) which was used in next step without further purification. 1H NMR (500 MHz, DMSO-d6) δ 8.23 (1H, s), 7.37 (1H, d, J=7.3 Hz), 4.31 (1H, m), 1.92 (2H, m), 1.71 (2H, m), 1.53-1.59 (4H, m) ppm; LCMS-ESI (POS), M/Z, M+1: Found 276.0, Calculated 275.9.

1. customThe mixture thus obtained
2. washwashed with brine
3. dry with materialdried over MgSO4
4. customThe solvent was evaporated