反应详情

温度

20 °C

NaH (60% dispersion in oil, 310 mg, 7.75 mmol) was added to dry THF (10 mL) and stirred at 20° C. for 20 min prior to the addition of 3-(4-morpholinyl)propanol (676 mg, 4.66 mmol). The mixture was stirred for 30 min, fluoride 28 (300 mg, 1.55 mmol) added and the resulting solution stirred at 20° C. for 2.5 h under N2. Water was added and the solution extracted with DCM (4×30 mL). The combined organic fraction was dried and the solvent evaporated. The residue was purified by column chromatography, eluting with a gradient (0-5%) MeOH/DCM to give 1-oxide 31 (257 mg, 52%) as a pale yellow solid, mp 108-111° C.; 1H NMR δ 8.33 (d, J=9.3 Hz, 1 H, H-8), 7.21-7.26 (m, 2 H, H-7 and H-5), 4.22 (t, J=6.4 Hz, 2 H, CH2), 3.73 (t, J=4.6 Hz, 4 H, 2×CH2O), 3.00 (q, J=7.6 Hz, 2 H, CH2), 2.55 (t, J=7.0 Hz, 2 H, CH2), 2.48 (t, J=4.6 Hz, 4 H, 2×CH2N), 2.06 (m, 2 H, CH2), 1.43 (t, J=7.6 Hz, 3 H, CH3); 13C NMR δ 168.7, 164.6, 150.3, 128.4, 123.1, 121.6, 106.3, 67.3 (2), 66.9, 55.1, 53.7 (2), 30.7, 26.0, 12.2. Anal. Calcd for C16H22N4O3: C, 60.4; H, 7.0; N, 17.6. Found: C, 60.4; H, 7.0; N, 17.4%.

1. stirringThe mixture was stirred for 30 min
2. stirringthe resulting solution stirred at 20° C. for 2.5 h under N2
3. extractionthe solution extracted with DCM (4×30 mL)
4. customThe combined organic fraction was dried
5. customthe solvent evaporated
6. customThe residue was purified by column chromatography
7. washeluting with a gradient (0-5%) MeOH/DCM