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June 27, 2005Angewandte Chemie International Edition

[2+1] Cycloadditions of Terminal Alkynes to Norbornene Derivatives Catalyzed by Palladium Complexes with Phosphinous Acid Ligands

Julie Bigeault Laurent Giordano Gérard Buono

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Abstract

Two plus one makes three-membered rings in an unusual [2+1] cycloaddition of phenylethyne with norbornadiene as catalyzed by a new palladium(II) complex with phosphinous acid ligands (see scheme). A related complex (cyclohexyl replaces tBu) efficiently catalyzes the [2+1] cycloaddition of norbornene derivatives with various terminal alkynes to provide functionalized exo-alkylidenecyclopropanes.

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Bigeault et al. (2005) studied this question.

synapsesocial.com/papers/6a6e219c35aa2c282ce0273e https://doi.org/10.1002/anie.200500879

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