hydrogen; triphenylphosphine; tetracarbonylbis(μ-chloro)dirhodium(I) in benzene T=90°C; P=91200 Torr; 4 h; Yield given. Yields of byproduct given;

1: lithium diisopropyl amide / tetrahydrofuran / -78 - 20 °C / |Inert atmosphere 2: oxalic acid / 3 h / 20 °C View Scheme

1: With Co(3-Me-5-MeO-salen) in acetonitrile T=-20 - 20°C; 0.166667 h; Inert atmosphere; 2: With dihydrogen peroxide in water; acetonitrile T=-20°C; 24 h; Inert atmosphere; Further stages;