1: With potassium permanganate; sulfuric acid in water T=40°C; 20 h; 2: With sodium hydroxide in water

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;