1: LiOH*H2O / tetrahydrofuran / Ambient temperature; overnight 2: 86 percent / ammonium formate / 2.) 5percent Pd on C / tetrahydrofuran; H2O / 6 h / Ambient temperature 3: 59 percent / Cu2O / quinoline / 2 h / 150 °C 4: 78 percent / DIBAL-H / tetrahydrofuran / -4 °C View Scheme