反应详情

温度

-70 °C

To a −70° C. solution of 7-(ethoxycarbonyl)quinoline 1-oxide (1.67 g, 7.70 mmol) in dichloromethane (80 mL) was added trifluoromethanesulfonic anhydride (1.43 mL, 8.47 mmol) dropwise, under a nitrogen atmosphere. The mixture was stirred at −70° C. for 5 minutes. Then a solution of methylamine in tetrahydrofuran (21 mL, 42 mmol, 2.0 M) was added dropwise at −70° C. The mixture was stirred for 5 minutes and then the reaction was quenched with water (20 mL). The layers were separated and the aqueous was extracted with dichloromethane (3×30 mL). The combined organics were washed with brine, dried over sodium sulfate, filtered, and concentrated. Purification by flash column chromatography gave the title compound (720 mg, 41%) as a yellow solid. 1H NMR (400 MHz, CDCl3, δ): 8.42 (s, 1 H), 7.84-7.82 (m, 2 H), 7.63-7.61 (m, 1 H), 6.72-6.70 (m, 1 H), 4.92 (br. s., 1 H), 4.44-4.38 (m, 2 H), 3.12-3.11 (m, 3 H), 1.44-1.40 (m, 3 H).

1. stirringThe mixture was stirred for 5 minutes
2. customthe reaction was quenched with water (20 mL)
3. customThe layers were separated
4. extractionthe aqueous was extracted with dichloromethane (3×30 mL)
5. washThe combined organics were washed with brine
6. dry with materialdried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated
9. customPurification by flash column chromatography