反应详情

To a solution of 1-6 (5.5 g, 16.2 mmol), 5-formyl-2-methylpyrimidine (1-6a, 1.8 g, 14.7 mmol; for preparation, see J. Heterocyclic Chem., 28, 1281 (1991)) in 40 mL DMF was added K2CO3 (4.07 g, 32 mmol). The mixture was stirred at ambient temperature for 15 hr, and concentrated to a paste. The residue was diluted with water, extracted with ethyl acetate, and dried over magnesium sulfate. Following concentration, the residue was chromatographed on silica gel (70 chloroform/25 ethyl acetate/5 methanol) to give 1-7 as a white solid.

1. concentrationconcentrated to a paste
2. additionThe residue was diluted with water
3. extractionextracted with ethyl acetate
4. dry with materialdried over magnesium sulfate
5. concentrationconcentration
6. customthe residue was chromatographed on silica gel (70 chloroform/25 ethyl acetate/5 methanol)