1: With ammonia; lithium in tetrahydrofuran T=-78 - 25°C; 3 h; Inert atmosphere; 2: With lithium hydroxide hydrate in tetrahydrofuran; ethanol; water T=25 - 80°C; 1 h; Inert atmosphere; 3: With acetic acid in tetrahydrofuran; ethanol; water T=50°C; 18 h; Inert atmosphere;