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A thioarylation method is developed for the synthesis of 2,3-dihydrothiopheniums through an electrophilic-cyclization-cross-coupling mechanism, harnessing the gold(I)/(III) cycle of the recently developed MeDalPhosAuCl catalyst. Single-crystal X-ray crystal structural analysis of the dihydrothiophenium products characterized the antiaddition of the sulfur and Csp
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Kaplan et al. (2024) studied this question.
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