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• W2110147451 abstract "Palladium-catalyzed electrophilic allylic substitution of functionalized allyl chlorides and allyl acetates can be achieved in the presence of hexamethylditin under mild and neutral reaction conditions. This efficient one-pot procedure involves palladium-catalyzed formation of transient allylstannanes followed by generation of a bis-allylpalladium intermediate, which subsequently reacts with electrophiles. Using this catalytic transformation, various aldehydes and imines can be allylated providing highly functionalized homoallyl alcohols and amines. Furthermore, tandem bis-allylation reactions could be performed by employing tosyl isocyanate and benzylidenemalonitrile as substrates. A particularly interesting mechanistic feature of this reaction is that palladium catalyzes up to three different transformations in each catalytic cycle. Various allylic functionalities, including COOEt, CONH2, COCH3, CN, Ph, and CH3, are tolerated in the catalytic reactions due to the application of neutral and mild reaction conditions. The substitution reaction occurs with very high regioselectivity at the branched allylic terminus. Moreover, in several reactions, a high stereoselectivity was observed indicating that this new catalytic process has a high potential for stereoselective synthesis. The regioselectivity of the reaction can be explained on the basis of DFT calculations. These studies indicate that the allylic substituent prefers the γ-position of the η1-allyl moiety of the reaction intermediate." @default.
• W2110147451 created "2016-06-24" @default.
• W2110147451 creator A5057007717 @default.
• W2110147451 creator A5088269285 @default.
• W2110147451 date "2003-03-08" @default.
• W2110147451 modified "2023-10-16" @default.
• W2110147451 title "Palladium-Catalyzed Electrophilic Substitution of Allyl Chlorides and Acetates via Bis-allylpalladium Intermediates" @default.
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• W2110147451 doi "https://doi.org/10.1021/jo026767m" @default.
• W2110147451 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12662072" @default.
• W2110147451 hasPublicationYear "2003" @default.
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