反应详情

温度

65 °C

To a solution of 1,6-dimethyl-5-nitropyrimidine-2,4(1H,3H)-dione (6 g, 0.032 mol) in DMF (20 mL) was added 2-(3-bromopropoxy)tetrahydro-2H-pyran (10.85 g, 0.049 mol) and K2CO3 (13.44 g, 0.097 mol). The reaction was heated at 65° C. for 2 h, cooled to RT then diluted with EA (20 mL) and water (20 mL). The organic layer was washed with aq. 1N LiCl (3×30 mL), dried over Na2SO4 and concentrated to a residue which was purified by chromatography eluted with PE/EA (5:1 to 1:1) to give 1,6-dimethyl-5-nitro-3-(3-((tetrahydro-2H-pyran-2-yl)oxy)propyl) pyrimidine-2,4(1H,3H)-dione (5 g, 47.1% yield) as a yellow oil. LCMS: [MH+-THP] 244 and TR=1.180 min. Used without further purification.

1. temperaturecooled to RT
2. washThe organic layer was washed with aq. 1N LiCl (3×30 mL)
3. dry with materialdried over Na2SO4
4. concentrationconcentrated to a residue which
5. customwas purified by chromatography
6. washeluted with PE/EA (5:1 to 1:1)