“Ligandless” Pentafluoroethylation of Unactivated (Hetero)aryl and Alkenyl Halides Enabled by the Controlled Self-Condensation of TMSCF<sub>3</sub>-Derived CuCF<sub>3</sub>
作者:Jordi Mestre、Sergio Castillón、Omar Boutureira
DOI:10.1021/acs.joc.9b02001
日期:2019.12.6
Pentafluoroethylation of unactivated C(sp2)-X bonds (X = I, Br) using a storable, "ligandless" CuC2F5 reagent prepared by controlled self-condensation of ready available TMSCF3-derived CuCF3 has been developed. A thorough analysis by 19F NMR and ESI-MS revealed the nature of this reagent in solution. The operational simplicity and robustness of this system enables the efficient, late-stage incorporation
已经开发出了一种可活化的,“无配体的” CuC2F5试剂对未活化的C(sp2)-X键(X = I,Br)进行五氟乙基化,该试剂通过可控的自发TMSCF3衍生的CuCF3的自缩合制备。通过19 F NMR和ESI-MS进行的彻底分析揭示了该试剂在溶液中的性质。该系统的操作简单性和鲁棒性使C2F5单元可以高效,后期地并入各种(杂)芳基和复杂的烯基卤化物(如糖基,核苷和核碱基)中。