Copper- and Iron-Catalyzed Decarboxylative Tri- and Difluoromethylation of α,β-Unsaturated Carboxylic Acids with CF<sub>3</sub>SO<sub>2</sub>Na and (CF<sub>2</sub>HSO<sub>2</sub>)<sub>2</sub>Zn via a Radical Process
作者:Zejiang Li、Zili Cui、Zhong-Quan Liu
DOI:10.1021/ol3034059
日期:2013.1.18
A copper-catalyzed decarboxylative trifluoromethylation of various α,β-unsaturated carboxylic acids by using a stable and inexpensive solid, sodiumtrifluoromethanesulfinate (CF3SO2Na, Langlois reagent), was developed. In addition, an iron-catalyzed difluoromethylation of aryl-substituted acrylic acids by using zinc difluoromethanesulfinate (DFMS, (CF2HSO2)2Zn, Baran reagent) via a similar radical
通过使用稳定且廉价的固体三氟甲烷亚磺酸钠(CF 3 SO 2 Na,Langlois试剂),开发了铜催化的各种α,β-不饱和羧酸的脱羧三氟甲基化反应。另外,还通过类似的自由基方法,通过使用二氟甲亚磺酸锌(DFMS,(CF 2 HSO 2)2 Zn,Baran试剂),实现了铁催化的芳基取代的丙烯酸的二氟甲基化。
Highly Selective Activation of Vinyl C-S Bonds Over Aryl C-S Bonds in the Pd-Catalyzed Coupling of (E)-(β-Trifluoromethyl)vinyldiphenylsulfonium Salts: Preparation of Trifluoromethylated Alkenes and Dienes
作者:Hao Lin、Xicheng Dong、Yuxue Li、Qilong Shen、Long Lu
DOI:10.1002/ejoc.201200758
日期:2012.9
We describe the Suzuki coupling reaction of (E)-(beta-trifluoromethyl)vinyldiphenylsulfoniumsalts with arylboronic acid. The highly efficient and selective reaction provides a useful and mild method for the synthesis of trifluoromethylatedalkenes and dienes. Subsequent DFT studies showed that the oxidative addition transition state of the vinyl CS bond is much more favorable (11.7 kcal?mol1) than
An efficient method for the iron(III) porphyrincatalyzed olefination of various aldehydes with 2,2,2‐trifluorodiazoethane (CF3CHN2) under neutral conditions has been developed. This reaction is an important supplement to the synthetic applications of CF3CHN2.
Enantioselective Copper-Catalyzed Defluoroalkylation Using Arylboronate-Activated Alkyl Grignard Reagents
作者:Minyan Wang、Xinghui Pu、Yunfei Zhao、Panpan Wang、Zexian Li、Chendan Zhu、Zhuangzhi Shi
DOI:10.1021/jacs.8b04902
日期:2018.7.25
A copper-catalyzed system has been introduced for the enantioselective defluoroalkylation of linear 1-(trifluoromethyl)alkenes through C-F activation to synthesize various gem-difluoroalkenes as carbonyl mimics. For the first time, arylboronate-activated alkylGrignardreagents were uncovered in this cross-coupling reaction. Mechanistic studies confirmed that the tetraorganoborate complexes generated