in dichloromethane T=20°C; Wittig reaction; 48 h;

1: 2,2,2-trifluoroethyl(dimethylphosphonyl) acetate With sodium hydride in tetrahydrofuran T=0°C; 0.166667 h; 2: (E)-cinnamaldehyde in tetrahydrofuran T=-78°C; Horner-Wadsworth-Emmons reaction; 90 h; Further stages. Title compound not separated from byproducts.;