1: With copper(l) iodide; tetra(n-butyl)ammonium hydroxide in water T=60°C; 24 h; Inert atmosphereSealed tube; 2: With ammonia in water T=80°C; 48 h; Inert atmosphereSealed tube; 3: With formic acid in water T=20°C; 2 h; Inert atmosphere; chemoselective reaction;