sodium hydroxide in methanol T=20°C; 16 h;

1.1: sodium hydroxide / methanol / 16 h / 20 °C 2.1: N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate; N-ethyl-N,N-diisopropylamine / dichloromethane / 2 h / 20 °C 3.1: 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; benzotriazol-1-ol; triethylamine / dichloromethane / 0.5 h / 20 °C 3.2: 24 h / 20 °C View Scheme

sodium hydroxide in methanol T=20°C; 16 h;