cyclohexa-1,4-diene; palladium in N,N-dimethyl-formamide T=75 - 80°C; 1 h;

palladium in N-methyl-acetamide

1: 45 percent / etheral hydrogen chloride, sulfuryl chloride / ethanol / 2.75 h / 20 °C 2: triethylamine / ethanol / 24 h / Heating 3: 100 percent / 1,4-cyclohexadiene / palladium black / dimethylformamide / 1 h / 75 - 80 °C View Scheme

1: triethylamine / ethanol / 24 h / Heating 2: 100 percent / 1,4-cyclohexadiene / palladium black / dimethylformamide / 1 h / 75 - 80 °C View Scheme

1: 70 percent / dimethylformamide / 1 h / Heating 2: 100 percent / 1,4-cyclohexadiene / palladium black / dimethylformamide / 1 h / 75 - 80 °C View Scheme

in N,N-dimethyl-formamide