1: 75 percent / diethylaminosulfur trifluoride / CH2Cl2 / 36 h / Ambient temperature 2: 52 percent / tetrahydrofuran / 48 h / 0 °C View Scheme

1: 75 percent / diethylaminosulfur trifluoride / CH2Cl2 / 36 h / Ambient temperature 2: 85 percent / hexane; diethyl ether / 36 h / Ambient temperature View Scheme

diethylamino-sulfur trifluoride in dichloromethane 36 h; Ambient temperature;