反应详情

(2-Methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-yl)-methanol (0.10 g, 0.50 mmol), 5-bromo-2-chloropyrimidine (0.16 g, 0.82 mmol) and NaH (˜30 mg, 60% in mineral oil) were suspended in 2 mL DMF and stirred at r.t. for 2 hours. The resulting mixture was diluted with 150 mL EtOAc, washed with 100 mL NaHCO3 and 100 mL water. The aqueous layer was re-extracted with 100 mL EtOAc. The organic layer was washed with brine and dried over Na2SO4. The concentrated residue was purified by column chromatography (DCM/MeOH, 0 to 3%) to give the title compound (152 mg, 83%) as a white solid. APCI MS m/z 356.6, 358.6 (M+H). 1H NMR (400 MHz, (CD3)2SO) δ 8.77 (s, 2H), 8.14 (s, 1H), 4.61 (s, 2H), 4.41 (d, J=11.1 Hz, 1H), 4.20 (d, J=11.1 Hz, 1H), 1.70 (s, 3H).

1. washwashed with 100 mL NaHCO3 and 100 mL water
2. extractionThe aqueous layer was re-extracted with 100 mL EtOAc
3. washThe organic layer was washed with brine
4. dry with materialdried over Na2SO4
5. customThe concentrated residue was purified by column chromatography (DCM/MeOH, 0 to 3%)