1: diisopropyl (2-oxo-2-(p-tolylamino)ethyl)phosphonate; meta-hydroxybenzaldehyde With sodium hydride in tetrahydrofuran T=20°C; Horner-Wadsworth-Emmons Olefination; 6 h; 2: (carboxymethyl)trimethylammonium chloride hydrazide in tetrahydrofuran; methanol stereoselective reaction;