tert-Butyl 4-(5-nitropyridin-2-yl)piperazine-1-carboxylate → tert-Butyl 4-(5-aminopyridin-2-yl)piperazine-1-carboxylate

Participants

Reaction Steps

A 250-mL round-bottomed flask was purged with nitrogen and charged with 197a (4.0 g, 13.0 mmol), 10% palladium on carbon (10% wet, 500 mg), and methanol (130 mL). The flask was evacuated, charged with hydrogen gas, and stirred at room temperature for 15 h. 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 197b (3.3 g, 91%). MS-ESI: [M+H]+ 279

Provenance & Evidence