反应详情

温度

0 °C

To a solution of (4-methylthio-phenyl)-(2-methyl-quinazolin-4-yl)-amine (263 mg, 0.94 mmol) in DMF (4 ml) at 0° C. was added sodium hydride (56.4 mg, 1.40 mmol, 60% oil dispersion) and followed by methyl iodide (0.09 ml, 1.40 mmol). The mixture was stirred at 0° C. for 1 h, then allowed to warm to room temperature and stirred for another 2 h. The reaction mixture was diluted with EtOAc (15 ml), washed with saturated NaHCO3 aq., brine, dried over Na2SO4, filtered and concentrated by vacuum. The residue was purified by chromatography on silica gel with acetate and hexane (1:2 to 1:1) as eluent, yielding 120 mg of title compound (40.7%). 1H NMR (CDCl3): 7.76 (d, J=9.0 Hz, 1H), 7.54 (t, J=7.5 Hz, 1H), 7.24-7.19 (m, 2H), 7.10-6.97 (m, 4H), 3.59 (s, 3H), 2.74 (s, 3H), 2.48 (s, 3H)

1. temperatureto warm to room temperature
2. stirringstirred for another 2 h
3. washwashed with saturated NaHCO3 aq., brine
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated by vacuum
7. customThe residue was purified by chromatography on silica gel with acetate and hexane (1:2 to 1:1) as eluent