Abstract
Aryl sulfonyl fluorides are prominently featured in organic synthesis and medicinal chemistry. Herein, a metal-free photoredox-catalyzed three-component assembly of aryl sulfonyl fluoride via aryl sulfonyl ammonium salt intermediate has been reported. A variety of structurally diverse aryl sulfonyl fluorides were synthesized rapidly from dibenzothiophenium (DBT) salts under mild conditions by using KHF2 as the fluorine source. Notably, this methodology can be employed as an efficient and sustainable approach for late-stage drug fluorosulfonylation. Good yields and broad functionality tolerance were the features of this methodology. Moreover, the derivatization of aryl sulfonyl fluoride molecules was also demonstrated to showcase its synthetic utility.
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