dicyclohexyl-carbodiimide in diethyl ether T=5°C; 3.5 h;

1: 96 percent / 2 h / 90 - 100 °C 2: 83 percent / NaOH, H2O / 17 h / Ambient temperature 3: 95 percent / 3 h / 140 - 150 °C 4: 85 percent / DCC / diethyl ether / 3.5 h / 5 °C View Scheme

1: 95 percent / 3 h / 140 - 150 °C 2: 85 percent / DCC / diethyl ether / 3.5 h / 5 °C View Scheme