Cu-Catalyzed/mediated synthesis of <i>N</i>-fluoroalkylanilines from arylboronic acids: fluorine effect on the reactivity of fluoroalkylamines
作者:Hui Wang、Yuan-Hong Tu、De-Yong Liu、Xiang-Guo Hu
DOI:10.1039/c8ob01581c
日期:——
An oxidative coupling reaction of fluoroalkylamines with arylboronicacids has been achieved for the first time. Fluorine has profound influence on the reactivity and fluoroalkylated amines have the following reactivity trend: difluoroethylamine > trifluoroethylamine > pentafluoropropylamine ≈ heptafluorobutylamine.
Silver(I)‐Catalyzed
<i>N</i>
‐Trifluoroethylation of Anilines and
<i>O</i>
‐Trifluoroethylation of Amides with 2,2,2‐Trifluorodiazoethane
作者:Haiqing Luo、Guojiao Wu、Yan Zhang、Jianbo Wang
DOI:10.1002/anie.201507219
日期:2015.11.23
A straightforward N‐trifluoroethylation of anilines has been developed based on silver‐catalyzedNH insertions with 2,2,2‐trifluorodiazoethane (CF3CHN2). Mechanistically, the reaction is proposed to involve migratory insertion of a silver carbene as the key step. In contrast, when amides are employed as the substrates under similar reaction conditions, O‐trifluoroethylation occurs to afford trifluoroethyl
Synthesis of tri(di)fluoroethylanilines <i>via</i> copper-catalyzed coupling reaction of tri(di)fluoroethylamine with (hetero)aromatic bromides
作者:Suo Chen、Hui Wang、Wei Jiang、Pei-Xin Rui、Xiang-Guo Hu
DOI:10.1039/c9ob02271f
日期:——
have realized the first Ullmann type coupling reaction of tri(di)fluoroethylamine with (hetero)aromatic bromides, employing 5–20 mol% Cu2O and an oxalamide ligand [N-(2,4,6-trimethoxyphenyl)acetamide]. This efficient and practical method has the following features: (i) avoids the use of an expensive catalyst; (ii) does not require anhydrous solvent and strict air extrusion; (iii) uses bench stable and