tert-Butyl 4-(2-methoxy-5-nitrophenyl)piperazine-1-carboxylate → Tert-butyl 4-(5-amino-2-methoxyphenyl)piperazine-1-carboxylate

Participants

Reaction Steps

A slurry of 10% palladium on carbon (10 g) in a solution of 4-tert-butoxycarbonyl-1-(2-methoxy-5-nitrophenyl)piperazine (D2) (124.5 g) in ethanol (3.5L) and water (50 ml) was stirred with hydrogen at ambient temperature and atmospheric pressure for 18 h. The reaction mixture was filtered and the filtrate concentrated to afford the title compound (D3) as a gum (112 g, 99%). MH+308.

Provenance & Evidence