反应详情

To a solution of tert-butyl 4-(1H-indol-5-yloxy)-5,6-dihydropyrido[3,4-d]pyrimidine-7(8H)-carboxylate, Example 31-C, (1 g, 2.73 mmol) in 20 mL of THF, sodium hydride (0.164 g, 4.09 mmol, 60% in mineral oil) is added at 0° C. After 1.5 h, a solution of 4-nitrophenyl carbonochloridate (1.65 g, 8.19 mmol) in THF (10 mL) is added. The mixture is allowed to warm to rt and stir overnight before being quenched with ice water and extracted with EtOAc. The combined organic layers are washed with water and brine before being dried (Na2SO4) and concentrated. The residue is then separated by FCC (20-80% EtOAc/heptane) to give the title compound. 1H NMR (400 MHz, CDCl3) δ ppm 8.54 (s, 1 H), 8.34-8.43 (m, 2 H), 7.79 (d, J=3.8 Hz, 1 H), 7.49-7.57 (m, 2 H), 7.41 (d, J=2.3 Hz, 1 H), 7.17 (dd, J=9.0, 2.4 Hz, 1 H), 6.75 (d, J=3.5 Hz, 1 H), 5.31 (s, 1 H), 4.65 (s, 2 H), 3.80 (t, J=5.8 Hz, 2 H), 2.95 (t, J=5.6 Hz, 2 H), 1.53 (s, 9 H).

1. custombefore being quenched with ice water
2. extractionextracted with EtOAc
3. washThe combined organic layers are washed with water and brine
4. dry with materialbefore being dried (Na2SO4)
5. concentrationconcentrated
6. customThe residue is then separated by FCC (20-80% EtOAc/heptane)