As an important bridge between the micro and macro material world, chemistry is one of the main methods and means for humans to understand and transform the material world. Application In Synthesis of 1,5-Diphenylpenta-1,4-dien-3-one, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 538-58-9
The reaction of (E)-1,3-diphenyl-3-acetoxyprop-1-ene, PhCH=CH-CH(Ph)-OAc, with palladium(0) complexes Pd0L2, generated from Pd 0(PPh3)4 or Pd0(dba)2 + 2L (L = PPh3 or L2 = dppb), gives cationic [(eta3-PhCH-CH-CHPh)PdL2]+ complexes with AcO- as the counteranion in DMF. It is established that this reaction proceeds through two successive equilibria via neutral intermediate complexes (eta2-PhCH=CH-CH(Ph)-OAc)Pd0L2, characterized from the kinetics and by UV and 31P NMR spectroscopy. The rate constants and equilibrium constants of the successive steps have been determined in DMF. They depend on the ligand and the Pd0 precursor. In all cases, for the concentration range investigated here, the complexation is considerably faster than the ionization, which is the rate-determining step of the overall process. Under similar experimental conditions, the formation of the cationic complex [(eta3-PhCH-CH-CHPh)Pd(dppb)]+ is considerably slower than the formation of the complex [(eta3- CH2-CH-CH2)Pd(dppb)]+ in DMF.
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Reference：
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate