hydrogen; 5-palladium/activated carbon in methanol T=20°C; P=760.051 Torr; 2 h;

dicyclohexyl(2',4',6'-triisopropyl-5-methoxy-3,4,6-trimethyl-[1,1'-biphenyl]-2-yl)phosphine; C50H70NO4PPdS; C50H70NO4PPdS; dicyclohexyl(2',4',6'-triisopropyl-4-methoxy-3,5,6-trimethyl-[1,1'-biphenyl]-2-yl)phosphine; ammonia; sodium t-butanolate in 1,4-dioxane T=50°C; 24 h; Inert atmosphere;

1: 26 percent / H2SO4, HNO3 / 80 °C 2: 97 percent / H2 / 10 percent Pd/C / methanol View Scheme

in ethanol 2 h; Ambient temperature;