1: With sodium hydroxide; water T=90°C; 5 h; 2: With hydrogenchloride in water pH=6 - 7; 3: With potassium permanganate; magnesium sulfate in water 2 h; Heating / reflux; Product distribution / selectivity;

1: With potassium permanganate; sulfuric acid T=40 - 50°C; 20 - 30 h; Acidic conditions; 2: With sodium hydroxide in water T=20°C; Alkaline conditions; 3: With sodium hydroxide; potassium permanganate; sulfuric acid; water Product distribution / selectivity; more than 3 stages;