An efficient, transition metal-free trifluoromethylative pyridylation of unactivated alkenes was achieved by visible-light-induced photoredox catalysis employing CF3SO2Na and a pyridinium salt in the presence of eosin Y as a photoredox catalyst. The overall process is thought to occur by the selective addition of an electrophilic CF3 radical to the alkene substrate to provide an alkyl radical intermediate
在
曙红Y作为光氧化还原催化剂的情况下,使用CF 3 SO 2 Na和
吡啶鎓盐,通过可见光诱导的光氧化还原催化,实现了未活化烯烃的高效,无过渡
金属的三
氟甲基化
吡啶基化反应。认为整个过程是通过将亲电CF 3自由基选择性地加到烯烃底物上以提供烷基自由基中间体而发生的,该中间体随后加入
吡啶鎓盐中。这种三组分的光催化策略规避了传统的多步程序,并容易提供合成和
生物学上重要的含三
氟甲基和
吡啶基的骨架。