1: With (R)-2-(o-fluorobenzyloxy)-2'-methoxy-1,1'-binaphthyl*SnCl4 in toluene T=-78°C; 72 h; 2: With 1H-imidazole; triethylsilyl chloride in N,N-dimethyl-formamide T=20°C; 5 h; 3: With TFA*SnCl4 in toluene T=-78°C; 24 h; Further stages. Title compound not separated from byproducts.;