1: (R)-(+)-2,2-dimethyl-1,3-dioxolane-4-carboxaldehyde With sodium periodate; sodium hydrogencarbonate in water T=0 - 20°C; 2.66667 h; Inert atmosphere; 2: dimethyl methylphosphonoacetate With potassium carbonate in water T=0 - 20°C; Horner-Wadsworth-Emmons olefination; 12.1667 h; Inert atmosphere;