The title reaction was achieved by UV (254 nm) irradiation with CF3I. The methylthio group was introduced to increase electron density and to limit available reactive sites in the rings. Following trifluoromethylation, the methylthio groups were readily removed by hydrogenolysis (Raney Ni) to give the desired trifluoromethyl heterocycles.
标题反应是通过紫外线(254 纳米)照射
CF3I 实现的。引入甲
硫基是为了增加电子密度并限制环中的可用反应位点。三
氟甲基化后,甲
硫基很容易通过氢解(Raney Ni)去除,得到所需的三
氟甲基杂环。