toluene-4-sulfonic acid; triethylamine in toluene

1: With urea in water T=100 - 150°C; P=300 - 600 Torr; Alkaline conditionsLarge scale; 2: in water T=100 - 195°C; P=45 Torr; PyrolysisLarge scale;

1: With zinc diacetate; urea; potassium hydroxide T=140°C; P=300 Torr; 2: T=195 - 215°C; P=10 - 50 Torr; Pyrolysis;