A ferrocenyl triphosphane with palladium form a "champagne-catalyst" for selective heteroaryl ether synthesis by using as little as 0.2 mol% of metal:ligand. In their article on page 3403 ff, J.-C. Hierso, M. Saeys and co-workers, describe the etherification of heavily functionalized phenols, electron-rich, electron-poor and para-, meta- or ortho-substituted substrates, with heteroaryl chlorides, including pyridines, hydroxylated pyridine, pyrimidines and thiazoles. DFT studies demonstrate that triphosphane ligands open up various new pathways for C![[BOND]](http://onlinelibrarystatic.wiley.com/undisplayable_characters/00f8ff.gif)
O reductive elimination involving the third phosphane group. One of these pathways is calculated to be about 1000 times faster than for reductive elimination from a complex with a chelating ferrocenyl diphosphane ligand.
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