An efficient palladium-catalyzed olefination of Ntosylhydrazones as-diazo phosphonate precursors with aryl halides has been developed. 2,2-Disubstituted vinylphosphonates bearing versatile functional groups were easily accessed in moderate to excellent yields. Various aryl halides could be employed as the coupling partners, such as (hetero)aryl bromides, aryl iodides, and even aryl chlorides. Moreover, with a simi-[a] J. He, Y.
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