palladium diacetate; potassium phosphate; biphenyl-2-yl-di-tert-butyl-phosphane in toluene T=100°C; 15 h;

1: 4-tert-butyl-phenol With 1,10-phenanthroline; caesium carbonate; copper on carbon in 1,4-dioxane T=20°C; 0.5 h; 2: para-chloroacetophenone in 1,4-dioxane T=200°C; Ullmann coupling; 8 h; microwave irradiation;

pyridine-2-carboxylic acid; potassium phosphate; copper(l) iodide in dimethyl sulfoxide T=90°C; 24 h; Inert atmosphereSchlenk technique;

potassium carbonate in N,N-dimethyl acetamide Heating;