Gold, gold, or …︁ gold? It depends on the (gold) catalyst whether the product of thermodynamic or kinetic control is formed in an unprecedented hydrophosphoryloxylation approach to enol phosphates (see scheme). A third catalyst, [(C6F5)3PAuOTf], was found to be exceedingly effective for the previously unknown isomerization of kinetic enol phosphates to the thermodynamically favored isomers. Tf=trifluoromethanesulfonyl; R=alkyl, cyclohexyl, Ph.
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