1: cyclohexanone With lithium diisopropyl amide in tetrahydrofuran; hexane T=-78°C; 1 h; 2: 2-(2-iodoethyl)-2-methyl-1,3-dioxolane With N,N,N',N',N'',N''-hexamethylphosphoric triamide in tetrahydrofuran; hexane T=20°C; 17 h; Further stages.;

in toluene 18 h; Heating;

water; acetic acid T=65°C; 0.25 h;