1.1: Al(CH3)3 / toluene / 1 h / 0 °C 1.2: 74 percent / toluene / 4 h / Heating 2.1: 96 percent / H2 / Pd/C / ethanol / 20 °C View Scheme

1: propylamine With trimethylaluminum in toluene T=0°C; 1 h; 2: 1,4-dibenzyl-2-hexoxymethyl-piperazine in toluene 4 h; Heating; Further stages.;