AbstractIn the vibrant field of SF5 chemistry, SF5X reagents (X=F, Cl, Br) are at the heart of current investigations in radical pentafluorosulfanylation reactions. SF5I is the missing link whose existence has not been reported despite its potential as SF5 donor. This study reports the formal addition of the hitherto unknown SF5I reagent to alkynes by means of a combination of SF5Cl/KI/18‐crown‐6 ether. The exclusive regio‐ and stereoselective synthesis of unprecedented (E)‐1‐iodo‐2‐(pentafluoro‐λ6‐sulfanyl) alkenes was achieved. A consensus was reached through computational and mechanistic studies for the realistic formation of SF5− anion but not SF5I in solution and the rational involvement of SF5⋅ and iodine radicals in the iodo pentafluorosulfanylation reaction.
摘要 在充满活力的 SF5
化学领域,SF5X 试剂(X=F、Cl、Br)是目前研究
五氟苯硫酰自由基反应的核心。SF5I 是缺失的一环,尽管它具有作为 SF5 给体的潜力,但其存在尚未见报道。本研究报告了迄今未知的 SF5I 试剂通过 SF5Cl/KI/18-18-crown-6 醚组合与
炔烃的正式加成反应。该研究独家实现了前所未有的 (E)-1-iodo-2-(pentafluoro-λ6-sulfanyl) 烯的区域和立体选择性合成。通过计算和机理研究,就 SF5- 阴离子而非 SF5I 在溶液中的实际形成以及 SF5⋅ 和
碘自由基在
碘五
氟磺酰化反应中的合理参与达成了共识。