1: p-bromo-(2'-methyl-1',3'-dioxolan-2'-yl)-benzene With magnesium in tetrahydrofuran Heating; 2: ethyl-α,α,α-trifluoroacetate T=-78°C; 3: With hydrogenchloride T=20°C;

n-butyllithium Yield given. Multistep reaction;

diethylzinc in hexane T=20°C; 5 h;

1: diethylzinc With C58H44N2 in toluene T=-20°C; 0.5 h; Inert atmosphere; 2: 1-(4-acetylphenyl)-2,2,2-trifluoroethanone in toluene T=-40°C; Inert atmosphere; enantioselective reaction;