In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, category: chiral-oxygen-ligands, name is 1,5-Diphenylpenta-1,4-dien-3-one, introducing its new discovery. category: chiral-oxygen-ligands
The cascade synthesis of alpha,beta-unsaturated ketones via oxidative C-C coupling of ketones and primary alcohols over a ceria catalyst
We herein report the oxidative C-C coupling of ketones and primary alcohols to produce alpha,beta-unsaturated ketones in the absence of base additives. This cascade synthetic reaction was conducted at 150 C in 12 h using a heterogeneous CeO2 catalyst. The conversion of acetophenone reached 74% with 89% selectivity to chalcone. A correlation between the CeO2 crystal plane and catalytic performance is established as the catalytic activities decrease in the sequence of (110) > (111) > (100). Characterization using Raman spectroscopy, CO2 temperature-programmed desorption (CO2-TPD), and in situ active site-capping tests has shown that the unusual catalysis of the CeO2 catalyst is attributed to the coexistence of basic and redox active sites. These sites synergistically catalyze the oxidation of alcohols to aldehydes and the aldol condensation to ketones. Moreover, the CeO2 catalyst can be reused several times after calcination to remove the surface-adsorbed substances.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.category: chiral-oxygen-ligands. In my other articles, you can also check out more blogs about category: chiral-oxygen-ligands
Reference£º
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate