nickel; hydrazine hydrate in tetrahydrofuran; methanol T=20°C; 6 h;

1: 39 percent / hydrazine hydrate; Raney nickel / tetrahydrofuran; methanol / 6 h / 20 °C 2: 86 percent / pyridinium chlorochromate / CH2Cl2 / 1.5 h / 20 °C View Scheme