反应详情

A 250-mL single-neck round-bottomed flask was purged with nitrogen and charged with 232b (2.0 g, 9.0 mmol), 10% palladium on carbon (50% wet, 200 mg), and methanol (40 mL). The flask was evacuated, charged with hydrogen gas, and stirred under hydrogen at room temperature for 12 h. The hydrogen was then evacuated and nitrogen was charged to the flask. The catalyst was removed by filtration through a pad of CELITE® and the filtrate was concentrated under reduced pressure to afford 232c (1.6 g, 92.5%), which was used directly in the next step without further purification. MS-ESI: [M+H]+ 192

1. customA 250-mL single-neck round-bottomed flask was purged with nitrogen
2. customThe flask was evacuated
3. additioncharged with hydrogen gas
4. customThe hydrogen was then evacuated
5. additionnitrogen was charged to the flask
6. customThe catalyst was removed by filtration through a pad of CELITE®
7. concentrationthe filtrate was concentrated under reduced pressure