1: morpholine; formaldehyd; hydrogen cyanide With sodium hydroxide in water T=10 - 35°C; pH=11.8; 2 h; 2: dimethyl sulfate With sodium hydroxide; sulfuric acid in water T=30 - 50°C; pH=1 - 8.2; 6 h; 3: With sodium hydroxide; dimethyl sulfate in water