反应详情

温度

0 °C

To (+/−)-3,5-dichloro-1-[1-(methoxymethyl)propyl]-2(1H)-pyrazinone (300 mg) and 4-bromo-2,6-dimethylaniline (238 mg) in THF (anhydrous, 9.4 mL) at 0° C. was added sodium bis(trimethylsilyl)amide (1.0 M/THF, 2.6 mL). The mixture was stirred at 0° C. for 10 minutes. Ethyl acetate (100 mL) was added and washed with water (25 mL) and brine (25 mL). The organic layer was dried over MgSO4 and concentrated and the crude product was chromatographed on silica gel using ethyl acetate/hexane (1:4) as eluent. The product was then crystallized from ethyl acetate/hexane to afford the title compound (419 mg). Elemental analysis calcd. for C17H21N3O2BrCl: C, 49.23; H, 5.10; N, 10.13. Found: C, 49.33; H, 5.05; N, 10.09.

1. washwashed with water (25 mL) and brine (25 mL)
2. dry with materialThe organic layer was dried over MgSO4
3. concentrationconcentrated
4. customthe crude product was chromatographed on silica gel
5. customThe product was then crystallized from ethyl acetate/hexane