反应详情

温度

45 °C

To a solution of 2-(2-chloro-4-methoxy-phenyl)-1-(2-chloro-pyridin-4-yl)-ethanone (17.1 g, 0.058 mol) in tetrahydrofuran (550 ml) was added sodium hydride (55%-65% dispersion in mineral oil, 2.43 g, 0.063 mol). The mixture was stirred at 45° C. for 3 h and then placed in an ice bath. A solution of methyl iodide (9.01 g, 0.0635 mol) in tetrahydrofuran (50 ml) was added dropwise. The ice bath was removed and the mixture was stirred at 35° C. for 3 h. The mixture was poured in ice water and extracted twice with AcOEt. The organic phases were washed with brine, dried over MgSO4 and concentrated. The residue was purified by column chromatography (silica gel, heptane/AcOEt 4:1) to give the title compound (14.7 g) as yellow viscous oil. MS (m/e, ISP neg. ion)=310.3 [M−H−].

1. customplaced in an ice bath
2. customThe ice bath was removed
3. stirringthe mixture was stirred at 35° C. for 3 h
4. additionThe mixture was poured in ice water
5. extractionextracted twice with AcOEt
6. washThe organic phases were washed with brine
7. dry with materialdried over MgSO4
8. concentrationconcentrated
9. customThe residue was purified by column chromatography (silica gel, heptane/AcOEt 4:1)