benzotriazol-1-ol in methanol 24 h; Ambient temperature;

1: 88 percent / 1-hydroxybenzotriazole, dicyclohexylcarbodiimide / CH2Cl2 / Ambient temperature 2: 100 percent / CF3COOH / CH2Cl2 / Ambient temperature 3: 100 percent / Et3N, diethoxyphosphoryl cyanide / CH2Cl2 / Ambient temperature 4: HCl (gas) / diethyl ether / 0.33 h / Ambient temperature 5: Et3N, diethylphosphoryl cyanide / CH2Cl2 / Ambient temperature 6: 5.81 g / CF3COOH / CH2Cl2 / Ambient temperature 7: 78 percent / Et3N, diethylphosphoryl cyanide / CH2Cl2 / Ambient temperature 8: 5.4 g / CF3COOH / CH2Cl2 / Ambient temperature 9: 97 percent / Et3N, diethoxyphosphoryl cyanide / CH2Cl2 / Ambient temperature 10: 85 percent / 1-hydroxybenzotriazole / methanol / 24 h / Ambient temperature View Scheme

1: 88 percent / 1-hydroxybenzotriazole, dicyclohexylcarbodiimide / CH2Cl2 / Ambient temperature 2: 100 percent / CF3COOH / CH2Cl2 / Ambient temperature 3: 100 percent / Et3N, diethoxyphosphoryl cyanide / CH2Cl2 / Ambient temperature 4: HCl (gas) / diethyl ether / 0.33 h / Ambient temperature 5: Et3N, diethylphosphoryl cyanide / CH2Cl2 / Ambient temperature 6: 5.81 g / CF3COOH / CH2Cl2 / Ambient temperature 7: 78 percent / Et3N, diethylphosphoryl cyanide / CH2Cl2 / Ambient temperature 8: 5.4 g / CF3COOH / CH2Cl2 / Ambient temperature 9: 97 percent / Et3N, diethoxyphosphoryl cyanide / CH2Cl2 / Ambient temperature 10: 85 percent / 1-hydroxybenzotriazole / methanol / 24 h / Ambient temperature View Scheme

1: 100 percent / CF3COOH / CH2Cl2 / Ambient temperature 2: 100 percent / Et3N, diethoxyphosphoryl cyanide / CH2Cl2 / Ambient temperature 3: HCl (gas) / diethyl ether / 0.33 h / Ambient temperature 4: Et3N, diethylphosphoryl cyanide / CH2Cl2 / Ambient temperature 5: 5.81 g / CF3COOH / CH2Cl2 / Ambient temperature 6: 78 percent / Et3N, diethylphosphoryl cyanide / CH2Cl2 / Ambient temperature 7: 5.4 g / CF3COOH / CH2Cl2 / Ambient temperature 8: 97 percent / Et3N, diethoxyphosphoryl cyanide / CH2Cl2 / Ambient temperature 9: 85 percent / 1-hydroxybenzotriazole / methanol / 24 h / Ambient temperature View Scheme

1: 72 percent / NaH / tetrahydrofuran / 16 h / Ambient temperature 2: Et3N, diethylphosphoryl cyanide / CH2Cl2 / Ambient temperature 3: 5.81 g / CF3COOH / CH2Cl2 / Ambient temperature 4: 78 percent / Et3N, diethylphosphoryl cyanide / CH2Cl2 / Ambient temperature 5: 5.4 g / CF3COOH / CH2Cl2 / Ambient temperature 6: 97 percent / Et3N, diethoxyphosphoryl cyanide / CH2Cl2 / Ambient temperature 7: 85 percent / 1-hydroxybenzotriazole / methanol / 24 h / Ambient temperature View Scheme

sodium tetrahydroborate in ethanol 48 h; Ambient temperature;