1: Methyltriphenylphosphonium bromide With sodium hexamethyldisilazane in tetrahydrofuran T=20°C; 0.5 h; 2: isopropyl-4 cyclohexene-3 one-1 in tetrahydrofuran Wittig reaction; 1 h; Heating;

4 Pd/C; hydrogen in octane T=150°C; Autoclave;