反应详情

Part G. 4-Iodo-benzoic acid methyl ester (1.42 g, mmol) and (1H-imidazol-2-ylmethyl)-dimethyl-amine (0.68 g, mmol) were stirred in DMSO (3.5 mL) under N2. K2CO3 (1.52 g, mmol) was added followed by the addition of CuI (0.52 g, mmol) and 1,10-phenanthroline (0.46 g, mmol). The reaction mixture was heated at 120–125° C. for 2 h. After cooling, EtOAc was added. It was washed with dil. NH3H2O, H2O, brine, dried over MgSO4, filtered, and concentrated to dryness. The residue was purified by FCC (silica gel, CH2Cl2:EtOAc=1:0 to 0:1, then 10% MeOH) to give pure 4-(2-dimethylaminomethyl-imidazol-1-yl)-benzoic acid methyl ester (0.56 g, yield 40%). 1H NMR (CDCl3) δ 7.84 (d, J=8.4 Hz, 2H), 7.40 (d, J=8.4 Hz, 2H), 6.87 (d, J=0.9 Hz, 1H), 6.80 (d, J=0.9 Hz, 1H), 3.65 (s, 3H), 3.10 (s, 2H), 1.96 (s, 6H) ppm.

1. temperatureThe reaction mixture was heated at 120–125° C. for 2 h
2. temperatureAfter cooling
3. washIt was washed with dil. NH3H2O, H2O, brine
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated to dryness
7. customThe residue was purified by FCC (silica gel, CH2Cl2