1: in dichloromethane T=20°C; 24 h; 2: With hydrogenchloride in water Reflux;

1: 2-(N-butylamino)acetic acid hydrochloride With sodium hydroxide in water; toluene T=0°C; 2: benzyl chloroformate in water; toluene 4 h; 3: With hydrogenchloride in water; toluene pH=1 - 2;