1: 26 percent / PdCl2 / dioxane / 2 h / 110 °C 2: 1.) H2, H3BO3, 2.) HOAc, conc.HCl / 1.) Raney-Ni / 1.) dioxane-water, 2.) 2 h, reflux View Scheme

1: 35 percent / PdCl2 / dioxane / 5 h / Heating 2: H2, aq. EtOH / Ra-Ni / 760 Torr 3: glacial acetic acid, conc. aq. HCl / 1.5 h / 100 °C View Scheme

1: 43 percent / PdCl3 / dioxane / 5 h / Heating 2: H2, aq. EtOH / Ra-Ni / 760 Torr 3: glacial acetic acid, conc. aq. HCl / 1.5 h / 100 °C View Scheme