1: (2-ethoxy-2-oxoethyl)(diphenyl)[3-triphenyl(phosphonio)phenyl]phosphonium bromide perchlorate With triethylamine in acetonitrile T=20°C; Wittig olefination; 0.25 h; Inert atmosphere; 2: benzaldehyde in acetonitrile T=60°C; Wittig olefination; 16 h; Inert atmosphere; optical yield given as percent de;