hydrogen; (+)-1,2-bis[(2S,5S)-2,5-diethylphospholano]benzene(1,5-cyclooctadiene)rhodium(I) trifluoromethane-sulfonate in benzene T=22°C; P=1551.49 Torr; 3 h; Product distribution / selectivity;

hydrogen; Rh-(S,S)-Et-DuPHOS in benzene T=20°C; P=1551.49 Torr; 3 h; Title compound not separated from byproducts.;

1: (2Z)-methyl 2-acetylaminopenta-2,4-dienoate With {(1,5-cyclooctadiene)Rh(1,2-bis((2S,5S)-2,5-diethylphospholano)benzene)}triflate; supercritical CO2; hydrogen T=40°C; P=72380.8 Torr; 18 h; 2: carbon monoxide With supercritical CO2; hydrogen T=60°C; P=82731.6 Torr; 48 h;

1.1: H2 / [(COD)Rh-(S,S)-Et-DuPHOS]OTf / benzene / 3 h / 20 °C / 1551.49 Torr 1.2: H2 / [(COD)Rh-(S,S)-Et-DuPHOS]OTf / benzene / 72 h / 80 °C / 20686.5 Torr 2.1: 84 percent / H2 / Pd/C / methanol / 18 h / 4654.46 Torr 3.1: 89 percent / HCl / H2O / Heating View Scheme

in dichloromethane-d2 T=20°C; 2 h; NMR tube; Reactivity;