The Brønsted acid-mediated reaction of unactivated alkynes with aryl sulfoxides leads to simultaneous hydration and intermolecular C-C bond formation. This solvent- and metal-free transformation directly delivers α-arylated carbonyl compounds as the products of a formal hydrative arylation in an atom-economical manner. The products bear useful synthetic handles for further functionalization.
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Kaiser et al. (2016) studied this question.
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