Synthetic Route of 538-58-9, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. In heterogeneous catalysis, catalysts provide a surface to which reactants bind in a process of adsorption.538-58-9, Name is 1,5-Diphenylpenta-1,4-dien-3-one, molecular formula is C17H14O. In a article，once mentioned of 538-58-9
The reaction of selenium monoketo ylides with the dibenzylidene derivatives of ketones (acetone, cyclopentanone, cyclohexanone) only takes place at one double bond of the dienone by a mechanism of the <1+2>-cycloaddition type with the formation of two isomeric cyclopropyl ketones.In the case of the dibenzylidene derivative of bicyclo<3.3.1>nonan-3-one the type of reaction, i.e., <1+2>– or <1+4>-cycloaddition, is determined by the direction of attack by the selenonium ylide (axial or equatorial).
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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