1: L-prolinol With sulfuryl dichloride; triethylamine in dichloromethane T=-78 - 20°C; 20.1667 h; 2: dimethyl amine in tetrahydrofuran T=100°C; 14.5 h; 3: With sodium hydroxide; water; trifluoroacetic acid more than 3 stages;

lithium aluminium tetrahydride in tetrahydrofuran T=0°C; Reflux;