反应详情

(Scheme 1, (B)) To a solution of 2-methyl-4,5-diphenyl-1H-imidazole (0.20 g, 0.85 mmol) in DMF (6 mL) was added NaH (60% in mineral oil, 0.038 g, 0.94 mmol). The resulting mixture was stirred at rt for 10 min. The stirring continued for 2 hours after addition of ethyl 7-bromoheptanoate (0.21 g, 0.90 mmol). The reaction mixture was diluted with diethyl ether (30 mL), washed by water, and then was dried over MgSO4. After filtration and concentration in vacuo, the residue was purified by flash chromatography (SiO2: EtOAc/Hexanes). This compound was obtained as a colorless oil (0.24 g, 0.61 mmol, 72% yield): 1H NMR (DMSO-d6) δ1.08 (m, 4H), 1.15 (t, J=7.2 Hz, 3H), 1.33 (m, 4H), 2.16 (t, J=6.6 Hz, 2H), 2.40 (s, 3H), 3.68 (t, J=7.8 Hz, 2H), 4.03 (q, J=4.5 Hz, 2H), 7.05)m, 1H), 7.13 (m, 2H), 7.34 (m, 4H), 7.48 (m, 3H); 13C NMR (DMSO-d6) δ13.4, 14.4, 24.3, 25.7, 27.8, 29.6, 33.5, 43.3, 59.9, 125.8, 126.0, 128.1, 128.3, 128.8, 129.3, 131.1, 131.8, 135.2, 135.3, and 144.0. Anal. Calcd for C25H30N2O2: C, 76.89; H, 7.74; N, 7.17. Found: C, 76.33; H, 7.67, N, 6.85.

1. waitThe stirring continued for 2 hours
2. washwashed by water
3. dry with materialwas dried over MgSO4
4. filtrationAfter filtration and concentration in vacuo
5. customthe residue was purified by flash chromatography (SiO2: EtOAc/Hexanes)