hydrogen; palladium 10 on activated carbon in methanol

1: (S)-(+)-2-Methylpiperazine; benzyl chloroformate in dichloromethane T=0 - 20°C; 3 h; 2: di-tert-butyl dicarbonate With N-ethyl-N,N-diisopropylamine in dichloromethane T=0 - 20°C;