1: 1-bromo-3-(chloromethyl)benzene With n-butyllithium; isopropylmagnesium chloride in tetrahydrofuran T=0°C; 2: N,N-dimethyl-formamide in tetrahydrofuran T=0°C; 1 h;

hydrogenchloride; diethyl ether; tin(ll) chloride anschl. mit H2O;