Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Tri(naphthalen-1-yl)phosphine, is researched, Molecular C30H21P, CAS is 3411-48-1, about Highly active, stable, catalysts for the Heck reaction; further suggestions on the mechanism.Category: chiral-nitrogen-ligands.
Tri(1-naphthyl)phosphine gives palladacycles which are very active catalysts for Heck reactions; mechanisms based on a PdII-PdIV cycle are proposed and a new, very efficient method of separating the product from the catalyst has been devised, which involves treatment with cyanide ion.
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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis