1: With hydrogenchloride; benzotriazol-1-ol in acetone T=0 - 20°C; 1 h; 2: With dicyclohexyl-carbodiimide in acetone T=0 - 20°C; 5 h; Product distribution / selectivity;

potassium hydrogencarbonate in water; ethyl acetate T=0°C; 1.5 h;

dicyclohexyl-carbodiimide in ethyl acetate T=0°C; 6 h; Product distribution / selectivity;