1: 96 percent / hydrogen / 5percent Pd/BaSO4 / pyridine / 6 h / 23 °C 2: 40 percent / ozone / CH2Cl2 / 3 h / -78 °C 3: 1.) Jones reagent, sodium hydroxide / 1.) acetone, 0 deg C, 15 min, 2.) methanol, RT, 1 h View Scheme

[(R)-(+)-2,2'-Bis(di-2-furanylphosphino)-6,6'-dimethoxy-1,1'-biphenyl]palladium(II) dichloride; tetramethylammonium triacetoxyborohydride in tetrahydrofuran T=60°C; 6.5 h; Inert atmosphere;