bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; anhydrous potassium trimethylsilanolate in ethylene glycol dimethyl ether T=20°C; Sonogashira coupling; 3 h;

bis-triphenylphosphine-palladium(II) chloride; anhydrous potassium trimethylsilanolate in ethylene glycol dimethyl ether T=20°C; Sonogashira coupling; 8 h;

bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; anhydrous potassium trimethylsilanolate in ethylene glycol dimethyl ether T=20°C; Sonogashira coupling; 3 h;

bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; anhydrous potassium trimethylsilanolate in ethylene glycol dimethyl ether T=20°C; Sonogashira coupling; 24 h;