反应详情

温度

70 °C

(R)-tert-butyl pyrrolidine-2-carboxylate (485 mg) was added to the mixture of potassium carbonate (393 mg), potassium iodide (31 mg) and the crude product from step (viii) in CH3CN (20 mL). After the mixture was stirred at 70° C. for 16 h, the reaction mixture was cooled to RT, diluted with water and extracted with EtOAc. The combined organic layer was washed with water and brine, dried and concentrated under reduced pressure. The residue was purified by flash column chromatography on amino silica gel to afford the sub-title compound (975 mg) as a white amorphous solid; 1H NMR (300 MHz, CDCl3); 6.92 (2H, s), 6.67 (1H, d), 6.39 (1H, d), 6.30 (1H, dd), 4.64 (2H, br s), 4.03-3.90 (2H, m), 3.76 (3H, s), 3.73 (2H, s), 3.20-3.00 (2H, m), 2.96-2.80 (1H, m), 2.66-2.50 (1H, m), 2.57 (6H, s), 2.46-2.30 (1H, m), 2.28 (3H, s), 2.22 (3H, s), 2.21-1.74 (6H, m), 1.43 (9H, s); LC-MS: m/z 655.

1. temperaturethe reaction mixture was cooled to RT
2. extractionextracted with EtOAc
3. washThe combined organic layer was washed with water and brine
4. customdried
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified by flash column chromatography on amino silica gel