Organic Letters · 2008 · 50 citations · 28 references
Natural SciencesChemistryCatalysisOrganic ChemistryCross-coupling ReactionsHeterocyclic ChemistryCross-coupling CatalysisPalladium-catalyzed Cross-coupling
The bis-pyrazole phosphine ligand BippyPhos is effective for the palladium-catalyzed cross-coupling of hydroxylamines with aryl bromides, chlorides, and iodides. Reactions proceed smoothly at 80 degrees C in toluene in the presence of Cs(2)CO(3) to give synthetically versatile N-arylhydroxylamine products in good to excellent yield.
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David W. Old, John P. Wolfe, Stephen L. Buchwald · Journal of the American Chemical Society · 1998 · 811 citations