1: With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.5 h; Inert atmosphere; 2: With iodine in tetrahydrofuran; hexane T=20°C; Inert atmosphere;
1: With n-butyllithium in tetrahydrofuran; hexane T=-70°C; Inert atmosphere; 2: With iodine in tetrahydrofuran; hexane T=20°C; Inert atmosphere; Temperature;