1: 48 percent / LiOH / H2O; tetrahydrofuran / 2.5 h / 0 °C 2: 82 percent / DCC; DMAP / CH2Cl2 / 0 - 20 °C 3: H2 / Lindlar catalyst / methanol / 3 h / 20 °C View Scheme

lithium hydroxide in tetrahydrofuran; water T=0°C; 2.5 h;