1: diphenylphosphine oxide With cupric triflate; 1,1,3,3-tetramethyldisiloxane in toluene T=100°C; 10 h; Inert atmosphere; 2: 2,6-dimethylphenyl iodide With caesium carbonate; N-methyl-2-(methylamino)ethylamine in toluene T=20 - 110°C; Inert atmosphere;