摘要:
                                We report the preparation of (E)- and (Z)-[2-((dimethoxyphosphinyl)oxy)-3-ethoxy-3-oxo-1-propenyl]- bromobis(triphenylphosphine)palladium from the corresponding ethyl (E)- and(Z)-3-bromo-2[(dimethoxyphosphinyl)oxy]propenoate and the X-ray crystal structure determination for (E)-[2-((dimethoxyphosphinyl)oxy)-3-ethoxy-3-oxo- 1-propenyl]bromobis(triphenylphosphine)palladium. The (E)-palladium complex was reduced to (E)-3-[H-2]phosphoenolpyruvate by treatment with a mixture of trifluoroacetic acid-d/trifluoroacetic anhydride under strict anhydrous conditions. The H-1-NMR spectrum of the E-isomer obtained from the reduction of the palladium complex was identical to the H-1-NMR spectra of(E)-3-[H-2]phosphoenolpyruvate previously prepared by two different synthetic strategies. The X-ray structure of the palladium phosphoenolpyruvate analogue is the first X-ray structure of any 3-substituted phosphoenolpyruvate analogue reported and along with its synthesis and transformation interrelates the stereochemistry of several S-substituted phosphoenolpyruvate analogues.