1: C17H18NO6P With sodium hydride; sodium iodide in tetrahydrofuran; mineral oil T=0°C; 0.166667 h; Inert atmosphere; 2: benzaldehyde in tetrahydrofuran; mineral oil T=-78 - 0°C; 3.08333 h; Inert atmosphere; Overall yield = 72 percent; stereoselective reaction;