bis(triphenylphosphine)palladium(II)-chloride; 1,8-diazabicyclo[5.4.0]undec-7-ene in N,N-dimethyl acetamide T=115°C; P=4654.3 - 4912.9 Torr; 4 h;

[{(η5-C5Me5)RhCl}2(μ-Cl)2]; silver(I) acetate; sodium acetate in 1,4-dioxane T=100°C; 36 h; Inert atmosphere;

1: isoamyl nitrite, iodine / CDCl3; dioxane / 18 h / Heating 2: 65 percent / 1,8-diazabicyclo<5.4.0>undec-7-ene, bis(triphenylphosphine)palladium(II) chloride / N,N-dimethyl-acetamide / 4 h / 115 °C / 4654.3 - 4912.9 Torr View Scheme

pyridine; acetic anhydride 1) N,N-dimethylacetamide, 70 deg C, 1 h; 2) N,N-dimethylacetamide, 80 deg C, 4 h; Yield given. Multistep reaction;

bis(triphenylphosphine)palladium(II)-chloride; 1,8-diazabicyclo[5.4.0]undec-7-ene; triphenylphosphine; sodium iodide in N,N-dimethyl acetamide T=115°C; 16 h; further reagents: LiCl, LiBr, LiI; various CO pressure (5-95 psig);

sodium sulfide in N,N-dimethyl-formamide