1: 2-(3-bromo-phenyl)-[1,3]-dioxolane With diisobutyl-aluminum chloride in tetrahydrofuran T=-78°C; Inert atmosphereSchlenk technique; 2: With n-butyllithium in tetrahydrofuran; hexane T=-78 - 20°C; Inert atmosphereSchlenk technique; 3: cyclohexane carboxylic acid chloride With CuCN*2LiCl in tetrahydrofuran; hexane T=-40 - 25°C; Inert atmosphere;