1: 1-iodo-3-propylbicyclo[1.1.1]pentane With tert.-butyl lithium; zinc(II) chloride in tetrahydrofuran T=25°C; Metallation; 1 h; 2: 1-(iodo)-4-methylbenzene With tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran T=25°C; Substitution; 24 h; Further stages.;