1: 1-bromo-2,2-diphenylcyclopropane With isopropylmagnesium chloride lithium chloride complex in tetrahydrofuran; 1,4-dioxane T=25°C; 48 h; 2: With zinc(II) chloride in tetrahydrofuran; 1,4-dioxane 3: 1-chloro-4-bromobenzene With Pd(OAc)2*1.5S-Phos in tetrahydrofuran; 1,4-dioxane Negishi coupling reaction; stereoselective reaction;

T=80°C; 10 h;

in diethyl ether T=-78°C; 3 h; Irradiationpentane; Yield given;

T=0°C; Irradiation; Yield given;

T=-78°C; Irradiation; Kinetics;