hydrogen; palladium 10 on activated carbon in methanol 2 h;

1: benzyl 4-(2-bromoethyl)piperazine-1-carboxylate With ammonia in ethanol T=0 - 20°C; 4 h; 2: di-tert-butyl dicarbonate With triethylamine in dichloromethane T=0 - 20°C; 24 h;