1: 3-(3-indolyl)-2-oxopropanoic acid With sodium hydroxide in water pH=12; 2: sodium 2-oxopropanoate With hydrogenchloride; L-proline in water T=20°C; pH=10; 5 h; Product distribution / selectivity;

1: With sodium hydroxide; hydroxylamine hydrochloride in water T=5 - 20°C; pH=7; 4 - 17.5 h; 2: With hydrogenchloride in water pH=2; Product distribution / selectivity;