52522-40-4, Name is Tris(dibenzylideneacetone)dipalladium-chloroform, belongs to catalyst-palladium compound, is a common compound. COA of Formula: C52H43Cl3O3Pd2In an article, once mentioned the new application about 52522-40-4.
Inverse-Electron-Demand Palladium-Catalyzed Asymmetric [4+2] Cycloadditions Enabled by Chiral P,S-Ligand and Hydrogen Bonding
Catalytic asymmetric cycloadditions of ambident Pd-containing dipolar species with nucleophilic dipolarophiles, namely, inverse-electron-demand cycloadditions, are challenging and underdeveloped. Possibly, the inherent linear selectivity of Pd-catalyzed intermolecular allylations and the lack of efficient chiral ligands are responsible for this limitation. Herein, two cycloadditions of such intermediates with deconjugated butenolides and azlactones were accomplished by using a novel chiral hybrid P,S-ligand and hydrogen bonding. By doing so, highly functionalized, optically active dihydroquinol-2-ones were produced with generally high reaction efficiencies and selectivities. Preliminary DFT calculations were performed to explain the high enantio- and diastereoselectivities.
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Reference£º
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method