palladium diacetate; caesium carbonate; triphenylphosphine in 1-methyl-pyrrolidin-2-one T=90°C; 1 h; Inert atmosphere;

1: 6-(β,β-dibromovinyl)-2,4-dichlorophenol With tetrabutyl ammonium fluoride in N,N-dimethyl-formamide T=20°C; 4 h; Sealed tubeInert atmosphere; 2: benzenesulphinic acid sodium salt With copper diacetate; triethylamine; palladium dichloride in N,N-dimethyl-formamide T=110°C; 12 h; Sealed tubeInert atmosphere;

tetrakis(triphenylphosphine) palladium(0); caesium carbonate in N,N-dimethyl-formamide T=90°C; 4 h; Inert atmosphereSchlenk technique; chemoselective reaction;

1: potassium carbonate / N,N-dimethyl-formamide / 12 h / 110 °C / under air; sealed tube 2: palladium dichloride / N,N-dimethyl-formamide / 6 h / 130 °C / under air; sealed tube View Scheme