反应详情

温度

-10 °C

DCM (20.0 mL) was added to a flask containing ethyl 3-amino-7-bromoquinoline-2-carboxylate (from commercial source, 1.38 g, 4.68 mmol) and pyridine (1.0 mL, 12 mmol). The reaction mixture was cooled to −10° C. Benzyl chloroformate (0.843 mL, 5.61 mmol) was added slowly. The mixture was then allowed to warm gradually to room temperature and stirred for an additional 1 h. The reaction mixture was concentrated under reduced pressure. The resulting residue was triturated with MeOH (10 mL) to form a precipitate that was collected by vacuum filtration and washed with cold MeOH to give the sub-title compound (1.73 g, 86%) as a white powder. LCMS calc. for C20H18BrN2O4(M+H)+: m/z=429.2. Found: 429.1.

1. temperatureto warm gradually to room temperature
2. concentrationThe reaction mixture was concentrated under reduced pressure
3. customThe resulting residue was triturated with MeOH (10 mL)
4. customto form a precipitate that
5. filtrationwas collected by vacuum filtration
6. washwashed with cold MeOH