A clean, transition metal‐ and oxidant‐free photochemical protocol was described for the direct trifluoromethylation of coumarins with Togni reagent. The reaction proceeded smoothly under mild condition to afford regioselective 3‐trifluoromethyl coumarins, moreover novel bis‐trifluoromethylated coumarins were formed. Preliminary bioactivity evaluation on some products showed potential antifungal activities
描述了使用Togni试剂对
香豆素进行直接三
氟甲基化的清洁,无过渡
金属和氧化剂的光
化学方案。反应在温和的条件下平稳进行,得到区域选择性的3-三
氟甲基
香豆素,而且形成了新型的双三
氟甲基化
香豆素。对某些产品的初步
生物活性评估显示出潜在的抗真菌活性。