diethylzinc in hexane T=20°C; 5 h;

1: 1,3-bis(1-adamantyl)-2-imidazolidene / dimethylformamide / 0.5 h / 20 °C 2: 0.37 g / NaOH / dimethylformamide; H2O / 20 °C View Scheme

1.1: Mg / tetrahydrofuran / Heating 1.2: -78 °C 1.3: 65 percent / aq. HCl / 20 °C 2.1: 99 percent / Et2Zn / hexane / 5 h / 20 °C View Scheme

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;