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Aryl and heteroaryl sulfoxides undergo ortho allylation upon treatment with Tf(2)O and allylsilanes. The method complements the use of sulfoxides to direct ortho-metalation and reaction with electrophiles as it allows allylic carbon nucleophiles to be added ortho to the directing group in a metal-free process. The versatile sulfide adducts can be selectively manipulated using various methods including Kumada-Corriu cross-coupling of the organosulfanyl group.
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Eberhart et al. (2011) studied this question.
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