1: With sodium dithionite in 2-methoxy-ethanol; water T=100°C; 2.5 h; 2: With hydrogenchloride in 2-methoxy-ethanol; water 0.416667 h; Heating / reflux; 3: With sodium carbonate in 2-methoxy-ethanol; water T=20°C; pH=~ 7 - ~ 8;

1: With hydrogen bromide T=70°C; 0.5 h; 2: With sodium nitrite T=-5°C; 0.25 h; 3: With hydrogen bromide; copper(I) bromide T=-5 - 70°C; 0.25 h;

sodium bromide; hydrogen bromide; sodium sulfite; sodium nitrite in (2S)-N-methyl-1-phenylpropan-2-amine hydrate; sulfuric acid; water; acetic acid

nitric acid; acetic anhydride