1: With tetrafluoroboric acid; iodobenzene; 3-chloro-benzenecarboperoxoic acid in dichloromethane; water T=25°C; Hofmann rearrangement; 48 h; Inert atmosphere; 2: With hydrogenchloride in dichloromethane; water Inert atmosphere;

samarium diiodide; water; triethylamine in tetrahydrofuran T=23°C; 1 h; Inert atmosphere; chemoselective reaction;

sodium in benzene 3 h; Heating;