in acetonitrile T=100°C; 2 h;

1: anthranilic acid With hydrogenchloride in water 2: With sodium nitrite in water T=0°C; 0.5 h; 3: 5-Acetoacetyl-amino-benzimidazol-2-one With acetic acid; sodium hydroxide in water T=20°C; 6 h; Product distribution / selectivity;

1: 5-Acetoacetyl-amino-benzimidazol-2-one With sodium hydroxide in water 2: benzenediazonium-2-carboxylate hydrochloride With sodium hydroxide; acetic acid in water Product distribution / selectivity;