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

Participants

Reaction Steps

A mixture of 2-bromo-5-nitropyridine (5.0 g, 24.6 mmol), tert-butyl piperazine-1-carboxylate (13.8 g, 74.2 mmol), acetonitrile (150 mL) was stirred at reflux for 2.5 h. After the reaction was completed, the solvent was removed under reduced pressure to afford 197a as a yellow solid (4.1 g, 54%). MS-ESI: [M+H]+ 309.

Provenance & Evidence