1: phenyllithium With 3-butyl-1,1-diethyl-1,3-dihydrobenzo[c][1,2]oxasilole in tetrahydrofuran; anhydrous butyl ether T=-78 - 20°C; Inert atmosphere; 2: N, N-diallyl-O-benzoyl hydroxylamine With copper(l) iodide; dpca in tetrahydrofuran; anhydrous butyl ether T=20°C; 2 h; Inert atmosphere;

copper dichloride in tetrahydrofuran; diethyl ether T=20°C; 1 h;

1: triphenyl boroxine With potassium carbonate in 1,4-dioxane T=130°C; 24 h; Inert atmosphere; 2: N, N-diallyl-O-benzoyl hydroxylamine in 1,4-dioxane Inert atmosphere;