1: Raney Ni / ethanol / 16 h 2: barium permanganate / CH2Cl2 / 16 h 4: O2, rose bengal / CH2Cl2; methanol / -78 °C / Irradiation 5: 2N hydrochloric acid / tetrahydrofuran / 2 h / Ambient temperature 6: Irradiation View Scheme

1: Raney Ni / ethanol / 16 h 2: barium permanganate / CH2Cl2 / 16 h View Scheme

1: 56 percent / H2 / Raney nickel / ethanol / Heating 2: 77 percent / MsCl, LiCl, s-collidine / dimethylformamide View Scheme