1: 3-isopropyl-2-methyl-hexa-4,5-dien-3-ol With methyl-magnesium iodide in 1,4-dioxane T=25°C; 1 h; 2: benzaldehyde With gallium(III) chloride in 1,4-dioxane; hexane T=25°C; 3 h; Further stages.;