Oxidative Additions of Alkynyl/vinyl Iodides to Gold and Gold-catalyzed Vinylation Reactions Triggered by the MeDalphos Ligand

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2021 Jun 25

PMID 34168822

Citations 13

Authors

Jessica Rodriguez

Alexis Tabey

Sonia Mallet-Ladeira

Didier Bourissou

Affiliations

Soon will be listed here.

Abstract

The hemilabile AdP(-CH)NMe ligand promotes fast, quantitative and irreversible oxidative addition of alkynyl and vinyl iodides to gold. The reaction is general. It works with a broad range of substrates of various electronic bias and steric demand, and proceeds with complete retention of stereochemistry from and vinyl iodides. Both alkynyl and vinyl iodides react faster than aryl iodides. The elementary step is amenable to catalysis. Oxidative addition of vinyl iodides to gold and π-activation of alkenols (and -alkenyl amines) at gold have been combined to achieve hetero-vinylation reactions. A number of functionalized heterocycles, tetrahydrofuranes, tetrahydropyranes, oxepanes and pyrrolidines were obtained thereby (24 examples, 87% average yield). Taking advantage of the chemoselectivity for vinyl iodides over aryl iodides, sequential transformations involving first a hetero-vinylation step and then a C-N coupling, a C-C coupling or an heteroarylation were achieved from a vinyl/aryl bis-iodide substrate.

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