1: phenyllithium With zinc dibromide in tetrahydrofuran; anhydrous butyl ether T=-50°C; 0.5 h; Inert atmosphereSchlenk technique; 2: 2-bromo-4,5-dimethylphosphinine With tris-(dibenzylideneacetone)dipalladium(0); 1,2-bis-(diphenylphosphino)ethane in tetrahydrofuran; anhydrous butyl ether T=50°C; 24 h; Inert atmosphereSchlenk technique;

tris-(dibenzylideneacetone)dipalladium(0); 1,2-bis-(diphenylphosphino)ethane in tetrahydrofuran T=-30 - 40°C; Inert atmosphereSchlenk technique; Reagent/catalyst;

nickel in toluene T=240°C; 16 h; Closed ampulla; Yield given;

1: 1.) Et3N 2.) H2O 2: 1.) Lawesson's reagent 2.) K2CO3, H2O / 1.) toluene, 110 deg C, 4 h 3: Ni / toluene / 16 h / 240 °C / Closed ampulla View Scheme

1: 1.) Lawesson's reagent 2.) K2CO3, H2O / 1.) toluene, 110 deg C, 4 h 2: Ni / toluene / 16 h / 240 °C / Closed ampulla View Scheme

1: 1.) Et3N 2.) H2O 2: 1.) Lawesson's reagent 2.) K2CO3, H2O / 1.) toluene, 110 deg C, 4 h 3: Ni / toluene / 16 h / 240 °C / Closed ampulla View Scheme

nickel T=250°C; 8 h;

1: toluene / Heating 2: Ni / 8 h / 250 °C View Scheme