tris-(trimethylsilyl)silane; 2,2'-azo-bisisobutyronitrile in toluene T=70 - 90°C; 5 h;

hydrogen; [rhodium(I)(carbonyl)2(acetylacetonate)]; 2,4-dimethylphenyl-phosphabarrelene in toluene T=70°C; 8 h;

hydrogen; [rhodium(I)(carbonyl)2(acetylacetonate)]; tris(2,4-di-tert-butyl-phenyl) phosphite in toluene T=70°C; 8 h;

1: 54 percent / potassium hexamethyldisilazide / tetrahydrofuran / 0.5 h / -78 °C 2: H2 / [Rh(CO)2acac]; 2,4-dimethylphenyl-phosphabarrelene / toluene / 8 h / 70 °C View Scheme

1: 97 percent / H2 / [Rh(CO)2acac]; 2,4-dimethylphenyl-phosphabarrelene / toluene / 4 h / 120 °C 2: 54 percent / potassium hexamethyldisilazide / tetrahydrofuran / 0.5 h / -78 °C 3: H2 / [Rh(CO)2acac]; 2,4-dimethylphenyl-phosphabarrelene / toluene / 8 h / 70 °C View Scheme

(i), (ii) NaBH4, (iii) oxalic acid, H2O; Multistep reaction;

(i) B2H6, THF, (ii) /BRN= 1209258/, (iii) H2O; Multistep reaction;

methanol