1: n-butyllithium; N-propionyl-2-bromoaniline in tetrahydrofuran; hexane T=-75°C; 1 h; Inert atmosphere; 2: CHF2COOEt in tetrahydrofuran; hexane T=-75 - 0°C; Inert atmosphere;

in tetrahydrofuran T=20°C; 24 h;

T=120°C;

copper(l) iodide; 1,10-phenanthroline; caesium carbonate in ethylene glycol dimethyl ether 24 h; Heating;