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
Direct Synthesis of Pentafluoroethyl Copper from Pentafluoropropionate as an Economical C<sub>2</sub>F<sub>5</sub> Source: Application to Pentafluoroethylation of Arylboronic Acids and Aryl Bromides
作者:Hiroki Serizawa、Kohsuke Aikawa、Koichi Mikami
DOI:10.1021/ol501332g
日期:2014.7.3
synthesis of pentafluoroethyl copper (CuC2F5) from a cupratereagent and ethyl pentafluoropropionate as one of the most economical and useful pentafluoroethyl sources was accomplished. The advantages of this method are; all the reagents employed are low-cost and operationally simple, and the CuC2F5 reagent is prepared in virtually quantitative yield. Furthermore, the CuC2F5 reagent prepared was successfully
由铜酸盐试剂和作为最经济和最有用的五氟乙基源之一的五氟丙酸乙酯直接合成了五氟乙基铜(CuC 2 F 5)。这种方法的优点是:所有使用的试剂都是低成本且操作简单的,并且CuC 2 F 5试剂的制备实际上是定量的。此外,制得的CuC 2 F 5试剂已成功应用于芳基硼酸和芳基溴化物的五氟乙基化反应的两种类型,从而以良好至优异的产率提供了五氟乙基化的芳族产品,包括大规模操作。
“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。
Cupration of C<sub>2</sub>F<sub>5</sub>H: Isolation, Structure, and Synthetic Applications of [K(DMF)<sub>2</sub>][(<i>t</i>-BuO)Cu(C<sub>2</sub>F<sub>5</sub>)]. Highly Efficient Pentafluoroethylation of Unactivated Aryl Bromides
作者:Anton Lishchynskyi、Vladimir V. Grushin
DOI:10.1021/ja407017j
日期:2013.8.28
Pentafluoroethane, C2F5H (HFC-125), is smoothly cuprated with preisolated or in situ-generated [K(DMF)][(t-BuO)(2)Cu] to give [K(DMF)(2)][(t-BuO)Cu(C2F5)] (1) in nearly quantitative yield. Complex 1 has been isolated, structurally characterized, and demonstrated to be an exceedingly versatile pentafluoroethylating reagent for a variety of substrates, including unactivated aryl bromides.