In Situ Generation of PhI<sup>+</sup>
CF<sub>3</sub>
and Transition-Metal-Free Oxidative sp<sup>2</sup>
CH Trifluoromethylation
作者:Cong Xu、Jingxin Liu、Wenbo Ming、Yingjie Liu、Jun Liu、Mang Wang、Qun Liu
DOI:10.1002/chem.201301585
日期:2013.7.8
to tri us: The introduction of CF3 units into organic molecules is important and requires the development of convenient trifluoromethylating reagents. Here, PhI+CF3, an acyclic electrophilic “CF3+” species, is described, including its in situ generation from TMSCF3, PhI(OAc)2, and KF and its direct applications in sp2 CH trifluoromethylations under mild transition‐metal‐free conditions (see scheme)
Synthesis of Chloro(phenyl)trifluoromethyliodane and Catalyst-Free Electrophilic Trifluoromethylations
作者:Cong Xu、Xiaoning Song、Jia Guo、Sibao Chen、Jie Gao、Jing Jiang、Fengyun Gao、Yuxin Li、Mang Wang
DOI:10.1021/acs.orglett.8b01510
日期:2018.7.6
present work deals with a challenge in the synthesis of aryltrifluoromethyliodanes (ArICF3X) and develops a direct route to PhICF3Cl via a simple ligand-exchange reaction of PhI(OCOCF3)2, Me3SiCF3, and NaCl for the first time. The I–Cl bond length in PhICF3Cl supports its iodonium character, which enables an enhanced CF3-transfer capability in electrophilic S-, O-, N-, and C-trifluoromethylations as
PhI(OAc)2-mediated oxidative trifluoromethylation of arenes with CF3SiMe3 under metal-free conditions
作者:Xinyue Wu、Lingling Chu、Feng-Ling Qing
DOI:10.1016/j.tetlet.2012.11.011
日期:2013.1
A PhI(OAc)2-mediated oxidative trifluoromethylation of arenes with CF3SiMe3 under metal-free conditions has been described. This protocol precludes the need of substrate pre-functionalization and metal catalysts, enabling a direct access to a series of trifluoromethylated arenes and heterocycles containing common functional groups in moderate and good yields.
A methodology for the photocatalyzed radical trifluoromethylation of indoles: A combined experimental and computational study
作者:Shelli A. Miller、Bas van Beek、Trevor A. Hamlin、F. Matthias Bickelhaupt、Nicholas E. Leadbeater
DOI:10.1016/j.jfluchem.2018.08.005
日期:2018.10
introduction of the trifluoromethylgroup on to indole scaffolds is presented. The procedure involves the use of sodium trifluoromethylsulfinate (Langlois reagent) as the source of the trifluoromethyl radical, and is performed photochemically with 2-tert-butylanthraquinone as a photocatalyst. The reaction has also been probed computationally. Reaction kinetics and molecularorbital analyses from our
Palladium‐Catalyzed Oxidative Trifluoromethylation of Indoles at Room Temperature
作者:Xin Mu、Shujun Chen、Xingliang Zhen、Guosheng Liu
DOI:10.1002/chem.201100283
日期:2011.5.23
Trifluoromethylation of indoles has been performed successfully at roomtemperature by using a novel palladium‐catalyzedoxidation strategy. In this reaction, PhI(OAc)2 has been used as an oxidant and TMSCF3 as a trifluoromethylation reagent (see scheme). A palladium(II/IV) mechanism has been proposed for the formation of the aryl CCF3 bond.