1: With n-butyllithium in diethyl ether; hexane T=-78°C; 1 h; 2: With copper dichloride in diethyl ether; hexane T=-78°C; 5 h;

1: With n-butyllithium in diethyl ether; hexane T=-78°C; 1 h; 2: With copper dichloride in diethyl ether; hexane T=-78 - 20°C; 5 h;