urea; sodium nitrite in methanol; tetrafluoroboric acid; water

potassium carbonate; bis(η3-allyl-μ-chloropalladium(II)); Tedicyp in N,N-dimethyl-formamide T=130°C; Heck reaction; 20 h;

in dichloromethane 6 h; Heating;

1: 2-(diethoxyphosphoryl)propionic acid methyl ester With sodium hydride in ethylene glycol dimethyl ether T=0 - 20°C; 2: 4-fluorobenzaldehyde in ethylene glycol dimethyl ether Wittig-Horner reaction;