1: With hydrogenchloride in water T=100°C; Pictet-Spengler reaction; 1 h; 2: With potassium hydroxide in water

trifluoroacetic acid 15 h; Heating; Title compound not separated from byproducts.;

trifluoroacetic acid 15 h; Heating; Title compound not separated from byproducts.;

1: C10H13NO With hydrogen bromide in water T=100°C; Pictet-Spengler cyclisation; 3 h; Reflux; 2: With sodium hydroxide in water 3: di-tert-butyl dicarbonate With sodium hydrogencarbonate in 2-methyl tetrahydrofuran; water T=20°C; Schotten-Baumann reaction; pH=8;

1: C10H13NO With trifluoroacetic acid 15 h; Heating; 2: di-tert-butyl dicarbonate With triethylamine in tetrahydrofuran T=20°C; 3 h; Further stages.;