An efficient and novel NHC(N‐heterocyclic carbene)‐palladium‐catalyzed three‐component cascade bisthiolation of terminal alkynes, K₂S (potassium sulfide) and diaryliodonium salts for the assembly of functionalized (Z)‐1,2‐bis(arylthio)alkene derivatives has been accomplished for the first time. This unique observation features a broad substrate scope, excellent functional‐group tolerance, and high regioselectivity. Especially, an arylthiolate anion from diaryliodonium salts and potassium sulfide was proposed as the key intermediate in the catalytic cycle.

中文翻译：

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末端炔烃的钯催化区域选择性三组分级联双硫醇化

一种高效新颖的NHC（N-杂环卡宾）-钯催化的末端炔烃，K ₂ S（硫化钾）和二芳基碘鎓盐的三组分级联双硫醇化反应，用于组装官能化的（Z）-1,2-双（芳硫基）烯烃衍生物已首次实现。这种独特的观察结果具有广泛的底物范围，出色的功能基团耐受性和高区域选择性。特别地，提出了由二芳基碘鎓盐和硫化钾形成的芳基硫醇盐阴离子作为催化循环中的关键中间体。