Direct Electrophilic N-Trifluoromethylation of Azoles by a Hypervalent Iodine Reagent
作者:Katrin Niedermann、Natalja Früh、Remo Senn、Barbara Czarniecki、René Verel、Antonio Togni
DOI:10.1002/anie.201201572
日期:2012.6.25
Effective CF3 transfer: Various electron‐rich nitrogen heterocycles (pyrazoles, triazoles, and tetrazoles) can be directly N‐trifluoromethylated by a hypervalent iodine reagent in an efficient manner. The optimized procedure, which includes an in situ silylation of the substrate followed by an acid‐catalyzed CF3 transfer, provides ready access to a series of new and previously challenging or inaccessible
有效的CF 3 转移:高价碘试剂可以有效地将各种富含电子的氮杂环(吡唑,三唑和四唑)直接被N-三氟甲基化。优化的程序包括将底物进行原位甲硅烷基化,然后进行酸催化的CF 3转移,从而可以轻松获得一系列新的且以前具有挑战性或难以获得的NCF 3化合物。