反应详情

A mixture of 4-chloro-2-methyl-6-phenylpyrrolo[3,2-d]pyrimidine (Example 1(e)) (50 mg, 0.21 mmol), 4-chlorophenylboronic acid (Aldrich Chemical Company) (39 mg, 0.25 mmol), tris(dibenzylide-neacetone) dipalladium(0) (Aldrich Chemical Company) (4.7 mg, 0.0051 mmol) and triphenylphosphine (Aldrich Chemical Company) (5.4 mg, 0.021 mmol) in a mixed solvent (600 μL of toluene, 300 μL of 1.0 M Na2CO3, and 150 μL of ethanol) was heated at reflux under N2 for 20 h. Upon cooling to the room temperature, the reaction mixture was diluted with H2O (20 mL) and extracted with CHCl3 (3×15 mL), dried over Na2SO4 and concentrated with a rotary evaporator. The crude material was purified by flash chromatography on silica gel with a gradient eluant of EtOAc(0-25%):hexanes(100-75%) to afford 32 mg (49%) of the title compound as a yellow solid. Mp: 281-283° C. 1H NMR (Acetone-d6; 400 MHz): δ 10.89 (s, 1), 8.18 (d, 2, J=8.5), 8.02 (d, 2, J=7.4), 7.60 (d, 2, J=8.5), 7.53 (t, 2, J=7.4) 7.46 (t, 1, J=7.4), 7.01 (s, 1), 2.72 (s, 3). MS m/z: 320 (M+1), 318 (M−1). HRMS (NBA-NaI) m/z Calcd for M+H, C19H14ClN3: 320.0955. Found: 320.0961.

1. temperaturewas heated
2. temperatureat reflux under N2 for 20 h
3. extractionextracted with CHCl3 (3×15 mL)
4. dry with materialdried over Na2SO4
5. concentrationconcentrated with a rotary evaporator
6. customThe crude material was purified by flash chromatography on silica gel with a gradient eluant of EtOAc(0-25%)