反应详情

To a suspension of 4-hydroxy-6-(3-morpholin-4-yl-propoxy)-[1.5]naphthyridine-3-carbonitrile in anhydrous CH2Cl2 (150 ml) was added oxalyl chloride (2.7 ml, 31.8 mmol) and DMF (0.1 ml, 20%) at room temperature under nitrogen. The suspension became a clear dark brown solution. The resulting mixture was stirred for an additional 1 hr. The solvent was removed by rotary evaporation. The residue was dissolved in ice-water mixture, made basic with (NH4OH), and extracted with CH2Cl2. The extracts were washed (brine), dried (Na2SO4), and concentrated to give the title compound (400 mg, 38%). H-NMR δ (DMSO-d6): 1.88 (2H, m), 2.26-2.29 (6H, m), 2.51 (2H, m), 3.49 (2H, m), 4.34 (2H, m), 6.834 (1H, d, C7-H), 8.147 (1H, d, C8-H), 8.711 (1H, s, C2-H).

1. customThe solvent was removed by rotary evaporation
2. dissolutionThe residue was dissolved in ice-water mixture
3. extractionextracted with CH2Cl2
4. washThe extracts were washed (brine)
5. dry with materialdried (Na2SO4)
6. concentrationconcentrated