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Marie Schuler, Franck Silva, Carla Bobbio, Arnaud Tessier and Véronique Gouverneur Gold(I)-Catalyzed Alkoxyhalogenation of β-Hydroxy-α,α-Difluoroynones Angewandte Chemie International Edition 47

Version of Record online: 6 AUG 2008 | DOI: 10.1002/anie.200802162

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Gold standard: AuCl was found to be the only suitable catalyst for the 6-endo-dig ring closure of hydroxylated difluorinated ynones (see scheme), a class of substrates that displays low reactivity owing to the presence of the gem-difluoro group. For the first time, a gold catalyst is used in combination with an electrophilic fluorinating reagent.

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