1: 7,7-dibromo-bicyclolt;4.1.0gt;heptane With copper(l) iodide; n-butyllithium in diethyl ether; hexane T=-45 - 0°C; 19 h; 2: 1-iodo-butane in diethyl ether; hexane T=0°C; 16 h;

copper(l) iodide in diethyl ether; hexane 35 h; cooling;