A Facile Synthesis of Pentafluorophenyl Olefinsviaan Arsonium Ylide

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Abstract
The in situ reaction of (pentafluorophenylmethylene)triphenylarsorane, generated from methylenetriphenylarsorane and hexafluorobenzene, with aromatic aldehydes gives good to excellent yields of pentafluorophenyl olefins with high stereoselectivity.