1: 80 percent / triethylamine / diethyl ether / 0.5 h / Ambient temperature 2: 99.8 percent / LiOH*H2O / tetrahydrofuran; H2O / 1 h / Ambient temperature 3: 65 percent / KHCO3 / H2O / 3 h / 50 °C View Scheme

triethylamine in diethyl ether 0.5 h; Ambient temperature;