Chemistry is traditionally divided into organic and inorganic chemistry. SDS of cas: 52522-40-4, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 52522-40-4
Palladium-Catalyzed Diastereoselective Formal [5 + 3] Cycloaddition for the Construction of Spirooxindoles Fused with an Eight-Membered Ring
A Pd-catalyzed formal [5 + 3] intermolecular cycloaddition reaction of isatin-derived alpha-(trifluoromethyl)imines with aryl substituted vinylethylene carbonates (VECs) has been reported, affording trifluoromethyl-group-containing spirooxindoles fused with an eight-membered ring as a single diastereoisomer in good yields in the presence of a Br¡ãnsted acid in a one-pot manner under mild conditions. The asymmetric version of this reaction has been also realized using a chiral phosphine ligand along with the further transformation of the obtained product to give a spirooxindolo pyrrolidine derivative upon oxidation.
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Reference£º
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method