C(sp<sup>3</sup>)–H Fluorination with a Copper(II)/(III) Redox Couple
作者:Jamey K. Bower、Andrew D. Cypcar、Brenda Henriquez、S. Chantal E. Stieber、Shiyu Zhang
DOI:10.1021/jacs.0c02583
日期:2020.5.6
initiate and terminate a C(sp3)-H halogenation sequence. While all three copper(III) halide complexes capture carbon radicals efficiently to afford C(sp3)-halogen bonds, LCuF is two orders of magnitude more efficient at hydrogen atom abstraction (HAA) than LCuCl and LCuBr. Alongside reported kinetic data for other LCu(III) species, we established a positive correlation between ligand basicity and the
Electroorganic synthesis under solvent-free conditions. Highly regioselective anodic monofluorination of cyclic ethers, lactones, and a cyclic carbonate
作者:Masaru Hasegawa、Hideki Ishii、Toshio Fuchigami
DOI:10.1016/s0040-4039(02)00047-3
日期:2002.2
Regioselective anodic fluorination of cyclic ethers, lactones, and a cyclic carbonate in Et4NF.nHF (n = 4, 5) and Et3N.5HF without a solvent was successfully carried out to give the corresponding monofluorinated products in moderate yields. This is the first report of direct electochemical fluorination of cyclic ethers, lactones, and a cyclic carbonate using anodic fluorination. (C) 2002 Elsevier Science Ltd. All rights reserved.
Light-promoted metal-free cross dehydrogenative couplings on ethers mediated by NFSI: reactivity and mechanistic studies
作者:Redouane Beniazza、Baptiste Abadie、Lionel Remisse、Damien Jardel、Dominique Lastécouères、Jean-Marc Vincent
DOI:10.1039/c7cc05854c
日期:——
Cross dehydrogenative couplings on ethers occur very effectively using N-fluorobis(phenyl)sulfonimide (NFSI) as oxidizingagent under UVA irradiation in the presence of 2 mol% benzophenone. The reaction was shown to proceed first by fast radical fluorination of the α-C–H bond of ethers, followed by HF elimination to yield the highly electrophilic oxocarbenium ion as a key intermediate.
Correction to “C(sp<sup>3</sup>)–H Fluorination with a Copper(II)/(III) Redox Couple”
作者:Jamey K. Bower、Andrew D. Cypcar、Brenda Henriquez、S. Chantal E. Stieber、Shiyu Zhang
DOI:10.1021/jacs.2c02407
日期:2022.4.6
LUNO is copper-centered, reflecting an inverted ligand field. The leading electronic configuration of all complexes remains L1d1, placing one electron in each orbital, which we still interpret as copper(II) bound to a ligand-centered radical, denoted CuII–X•. Figure 5 in the main text has also been corrected here (Figure 1) to reflect these changes. Figure 1. (a) Localized HONO and LUNO from the CASSCF
第 8517 页。考虑到最近的计算工作,(1)我们重新审视了原始论文中描述的多参考计算。Vlaisavljevich、Tolman 和同事计算了铜 (III) 卤化物配合物的 CASSCF 波函数,发现局部 CAS-CI 计算的结果与我们最初报告的结果不同。虽然他们最初的 CASSCF 结果在质量上与我们的相同,但发现本地化 CAS-CI 结果之间存在差异。为了调查这种差异,我们重新审视了我们的本地化程序和随后的 CAS-CI 计算。筛选 ORCA 中可用的定位程序(PM、FB、NEWBOYS、IAO-IBO 和 IAO-BOYS),我们发现L CuCl 和L的轨道存在细微差异比较不同轨道定位方案时的 CuBr(支持信息,图 S51 和 S52)。无论定位方案如何,L CuF的轨道基本相同。此外,对于所有三种配合物,L 2 d 0、L 0 d 2和 L 1 d 1的相对贡献(L 代表配体中心轨道;d