反应详情

A burgundy solution of 4-(3-amino-2-methylphenyl)-7-morpholino-9H-pyrido[3,4-b]indole-1-carboxamide (0.0612 g, 0.140 mmol), 1H-benzo[d][1,3]oxazine-2,4-dione (0.057 g, 0.351 mmol), trimethoxymethane (0.154 ml, 1.402 mmol) and lanthanum nitrate hexahydrate (0.018 g, 0.042 mmol) in THF (0.334 mL) in a sealed vial was stirred overnight at 95° C. The reaction was cooled to room temperature and concentrated in vacuo. The residue was dissolved in DMSO (0.2 mL) and MeOH (1.6 mL), and subjected to autoprep reverse phase HPLC. The appropriate fractions were collected, basified with NaHCO3 (solid), and concentrated in vacuo. The residue was extracted with CH2Cl2 (3×). The combine extract was dried over Na2SO4 and concentrated in vacuo to give the desired product (0.0135 g, 0.024 mmol, 17.1% yield) as a tan solid. LC/MS (M+H)=531.29; 1H NMR (500 MHz, DMSO-d6) (recognizable peaks for major atropoisomer) δ ppm 11.48 (1 H, s), 8.42 (1 H, s), 8.21-8.28 (2 H, m), 8.15 (1 H, s), 7.88-7.94 (1 H, m), 7.76-7.81 (1 H, m), 7.69-7.74 (1 H, m), 7.53-7.69 (4 H, m), 7.27 (1 H, d, J=2.22 Hz), 6.79-6.86 (1 H, m), 3.74-3.81 (4 H, m), 3.16-3.23 (4 H, m), 1.81 (3 H, s).

1. concentrationconcentrated in vacuo
2. dissolutionThe residue was dissolved in DMSO (0.2 mL)
3. customThe appropriate fractions were collected
4. concentrationconcentrated in vacuo
5. extractionThe residue was extracted with CH2Cl2 (3×)
6. extractionThe combine extract
7. dry with materialwas dried over Na2SO4
8. concentrationconcentrated in vacuo