反应详情

To a solution of tert-butyl 4-(3-chloro-5-nitropyridin-4-yl)piperazine-1-carboxylate (900 mg, 2.626 mmol) and ZnBr2 (118.3 mg, 28.16 μL, 0.5252 mmol) in methanol (27.00 mL) was added Pd on C (10%, wet, Degussa) (300 mg). The reaction mixture was stirred at RT for 4 h under an atmosphere of hydrogen (balloon). The catalyst was filtered off and the filtrate was concentrated in vacuo to yield tert-butyl 4-(3-amino-5-chloropyridin-4-yl)piperazine-1-carboxylate which was used without further purification (820 mg, 99%). MS (ES+) 313.2.

1. filtrationThe catalyst was filtered off
2. concentrationthe filtrate was concentrated in vacuo