AbstractSulfur(VI)‐fluoride exchange (SuFEx) chemistry, an all‐encompassing term for substitution events that replace fluoride at an electrophilic sulfur(VI), enables the rapid and flexible assembly of linkages around a SVI core. Although a myriad of nucleophiles and applications works very well with the SuFEx concept, the electrophile design has remained largely SO2‐based. Here, we introduce S≡N‐based fluorosulfur(VI) reagents to the realm of SuFEx chemistry. Thiazyl trifluoride (NSF3) gas is shown to serve as an excellent parent compound and SuFEx hub to efficiently synthesize mono‐ and disubstituted fluorothiazynes in an ex situ generation workflow. Gaseous NSF3 was evolved from commercial reagents in a nearly quantitative fashion at ambient conditions. Moreover, the mono‐substituted thiazynes could be extended further as SuFEx handles and be engaged in the synthesis of unsymmetrically disubstituted thiazynes. These results provide valuable insights into the versatility of these understudied sulfur functionalities paving the way for future applications.
摘要 硫(VI)-氟化物交换(SuFEx)化学是亲电硫(VI)取代氟化物的置换活动的总称,它能够围绕硫(VI)核心快速灵活地组装连接体。尽管无数的亲核物和应用都能很好地与 SuFEx 概念结合,但亲电物的设计在很大程度上仍以二氧化硫为基础。在此,我们将 S≡N 基氟硫(VI)试剂引入 SuFEx 化学领域。研究表明,三氟化噻嗪(NSF3)气体是一种极佳的母体化合物,也是在原位生成工作流程中高效合成单取代和二取代氟噻嗪的 SuFEx 中枢。在环境条件下,气态 NSF3 几乎是以定量的方式从商用试剂中演化出来的。此外,单取代噻嗪还可以作为 SuFEx 处理剂进一步扩展,并参与非对称二取代噻嗪的合成。这些结果为了解这些未被充分研究的硫官能团的多功能性提供了宝贵的见解,为未来的应用铺平了道路。