1: With sodium hydroxide; hydroxylamine hydrochloride in water T=-5 - 20°C; 1.5 h; 2: With hydrogenchloride in water T=5 - 60°C; pH=4 - 5.4; 1.5 h;

1: With 1,1'-carbonyldiimidazole in DMF (N,N-dimethyl-formamide) T=20°C; 2: With hydrogenchloride; water pH=4.5; Product distribution / selectivity;