bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide in triethylamine T=60°C; 48 h;

bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide in diethylamine

copper(l) iodide; [Pt(PPh3)4] in triethylamine T=75°C; 480 h;

trimethylamine N-oxide in hexane under Ar; diphosphine (1 equiv.) and Me3NO (2 equiv.) added to soln. of Co complex in hexane; stirred at 45°C for 5 d; solvent removed under vac.; purified by column chromy. (silica gel, hexane-CH2Cl2 3:1); satisfactory elem. anal.;

Yield given. Multistep reaction;

1: 1.) DIBAL-H; 2.) NBS 2: 1.) tert-BuLi; 2.) (PhSO2)2Se / 1.) ether, -80 deg C; 2.) ether 3: TBAF / tetrahydrofuran; H2O View Scheme