Copper-Mediated Perfluoroalkylation of Heteroaryl Bromides with (phen)CuR<sub>F</sub>
作者:Michael G. Mormino、Patrick S. Fier、John F. Hartwig
DOI:10.1021/ol500422t
日期:2014.3.21
synthetic goal over the past several decades. Previously, our group reported phenanthroline-ligated perfluoroalkyl copperreagents, (phen)CuRF, which react with aryliodides and aryl boronates to form the corresponding benzotrifluorides. Herein the perfluoroalkylation of a series of heteroaryl bromides with (phen)CuCF3 and (phen)CuCF2CF3 is reported. The mild reaction conditions allow the process to tolerate
The aromatic perfluoroalkylation catalyzed by a copper(I) salt with bis(perfluoroalkyl)zinc reagents Zn(RF)2(DMPU)2, which were prepared and then isolated as a stable white powder from perfluoroalkyl iodide and diethylzinc, was accomplished to provide the perfluoroalkylated products in good‐to‐excellent yields. The advantages of this reliable and practical catalytic reaction are 1) air‐stable and easy‐to‐handle
“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” Cu 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。
Studies on organic fluorine compounds. Part 27. Abnormal reactions in the trifluoromethylation of aromatic compounds with trifluoromethyl iodide and copper powder
作者:Yoshiro Kobayashi、Itsumaro Kumadaki
DOI:10.1039/p19800000661
日期:——
originally occupied by the bromine. Formation of pentafluoroethyl compounds is explained by decomposition of trifluoromethylcopper to cuprous fluoride and difluorocarbene, which can then react with a further molecule of trifluoromethylcopper to form pentafluoroethylcopper. This then reacts with aryl halide to give pentafluoroethyl compounds. Perfluoroalkylcopper is thermally cleaved to perfluoroalkyl radical