1: With n-butyllithium in hexane T=-70°C; Inert atmosphere; 2: in tetrahydrofuran; hexane T=-10°C; Inert atmosphere; 3: With 1,2-di-iodoethane in tetrahydrofuran; hexane T=-10°C; Inert atmosphere;
1: With n-butyllithium in hexane T=-70°C; Inert atmosphere; 2: in tetrahydrofuran; hexane T=-30°C; Inert atmosphere; 3: With 1,2-di-iodoethane in tetrahydrofuran; hexane T=-30°C; Inert atmosphere;
