当前位置：
X-MOL 学术
›
Angew. Chem. Int. Ed.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Direct C(sp3)−H Trifluoromethylation of Unactivated Alkanes Enabled by Multifunctional Trifluoromethyl Copper Complexes
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-11-17 , DOI: 10.1002/anie.202012263 Geunho Choi 1, 2 , Geun Seok Lee 1, 2 , Beomsoon Park 1 , Dongwook Kim 1, 3 , Soon Hyeok Hong 1
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-11-17 , DOI: 10.1002/anie.202012263 Geunho Choi 1, 2 , Geun Seok Lee 1, 2 , Beomsoon Park 1 , Dongwook Kim 1, 3 , Soon Hyeok Hong 1
Affiliation
|
A mild and operationally simple C(sp3)−H trifluoromethylation method was developed for unactivated alkanes by utilizing a bench‐stable CuIII complex, bpyCu(CF3)3, as the initiator of the visible‐light photoinduced reaction, the source of a trifluoromethyl radical as a hydrogen atom transfer reagent, and the source of a trifluoromethyl anion for functionalization. The reaction was initiated by the generation of reactive electrophilic carbon‐centered CF3 radical through photoinduced homolytic cleavage of bpyCu(CF3)3, followed by hydrogen abstraction from an unactivated C(sp3)−H bond. Comprehensive mechanistic investigations based on a combination of experimental and computational methods suggested that C−CF3 bond formation was enabled by radical–polar crossover and ionic coupling between the resulting carbocation intermediate and the anionic CF3 source. The methylene‐selective reaction can be applied to the direct, late‐stage trifluoromethylation of natural products and bioactive molecules.
中文翻译：
多功能三氟甲基铜配合物使未活化烷烃的直接C（sp3）-H三氟甲基化
通过使用稳定的Cu III络合物bpyCu（CF 3）3作为可见光光致反应的引发剂，一种稳定且操作简单的C（sp 3）-H三氟甲基化方法，开发了未活化的烷烃。三氟甲基自由基作为氢原子转移试剂，以及三氟甲基阴离子的官能化来源。该反应是通过光诱导bpyCu（CF 3）3的均相裂解生成反应性亲电碳中心CF 3自由基，然后从未活化的C（sp 3）提取氢而引发的）-H键。基于实验和计算方法相结合的综合力学研究表明，C-CF 3键的形成是通过自由基-极性交叉以及所得碳正离子中间体和阴离子CF 3源之间的离子偶联实现的。亚甲基选择性反应可用于天然产物和生物活性分子的直接，晚期三氟甲基化。
更新日期：2020-11-17
中文翻译：
多功能三氟甲基铜配合物使未活化烷烃的直接C（sp3）-H三氟甲基化
通过使用稳定的Cu III络合物bpyCu（CF 3）3作为可见光光致反应的引发剂，一种稳定且操作简单的C（sp 3）-H三氟甲基化方法，开发了未活化的烷烃。三氟甲基自由基作为氢原子转移试剂，以及三氟甲基阴离子的官能化来源。该反应是通过光诱导bpyCu（CF 3）3的均相裂解生成反应性亲电碳中心CF 3自由基，然后从未活化的C（sp 3）提取氢而引发的）-H键。基于实验和计算方法相结合的综合力学研究表明，C-CF 3键的形成是通过自由基-极性交叉以及所得碳正离子中间体和阴离子CF 3源之间的离子偶联实现的。亚甲基选择性反应可用于天然产物和生物活性分子的直接，晚期三氟甲基化。
京公网安备 11010802027423号