1: With sodium hydroxide; tetra(n-butyl)ammonium hydrogensulfate T=15 - 25°C; 12 h; 2: With hydrogenchloride in water

1: carbon disulfide; sodium ethanolate; acetone With sodium hydroxide; tetra(n-butyl)ammonium hydrogensulfate in water T=20°C; 0.5 h; 2: chloroform in water T=15 - 25°C; 12 h; 3: With hydrogenchloride in water

1: With sodium hydroxide; chloroform in water T=15 - 25°C; 12 h; 2: With hydrogenchloride in water