Metal-Free Direct Trifluoromethylthiolation of Aromatic Compounds Using Triptycenyl Sulfide Catalyst
作者:Ryo Kurose、Yuji Nishii、Masahiro Miura
DOI:10.1021/acs.orglett.1c00727
日期:2021.3.19
efficient synthetic method for the electrophilic trifluoromethylthiolation of aromaticcompounds. The key is to use triptycenyl sulfide (Trip-SMe) and TfOH to enhance the electrophilicity of SCF3 fragment through the formation of sulfonium intermediates. This method enables direct installation of an SCF3 group onto unactivated aromatics at room temperature, adopting a commercially available saccharin-based
Synthesis of Aryl Tri- and Difluoromethyl Thioethers via a CH-Thiocyanation/Fluoroalkylation Cascade
作者:Kévin Jouvin、Christian Matheis、Lukas J. Goossen
DOI:10.1002/chem.201502914
日期:2015.10.5
An AlCl3‐catalyzed CH thiocyanation was discovered and combined with a Langlois‐type trifluoromethylation to afford aryl trifluoromethyl thioethers directly from arenes, N‐thiocyanatosuccinimide (NTS) and Ruppert–Prakash reagent. An analogous combination with a copper‐mediated difluoromethylation gives access to aryldifluoromethylthioethers. Both processes proceed with exceptional regioselectivity
The super electrophilicity of a shelf-stable, easily prepared trifluoromethylthiolating reagent N-trifluoromethylthio-dibenzenesulfonimide 7 was demonstrated. Consistent with the theoretical prediction, 7 exhibits reactivity remarkably higher than that of other known electrophilic trifluoromethylthiolating reagents. In the absence of any additive, 7 reacted with a wide range of electron-rich arenes
Transition-Metal-Free Synthesis of Aryl Trifluoromethyl Thioethers through Indirect Trifluoromethylthiolation of Sodium Arylsulfinate with TMSCF<sub>3</sub>
作者:Changge Zheng、Chao Jiang、Shuai Huang、Kui Zhao、Yingying Fu、Mingyu Ma、Jianquan Hong
DOI:10.1021/acs.orglett.1c02656
日期:2021.9.3
Herein, we report an indirect trifluoromethylthiolation of sodium arylsulfinates. This transition-metal-free reaction significantly provides an environmentally friendly and practical synthetic method for aryl trifluoromethyl thioethers using commercial Ruppert–Prakash reagent TMSCF3. This approach is also a potential alternative to the current industrial production method owing to facile substrates
Tf<sub>2</sub>
O-Promoted Trifluoromethythiolation of Various Arenes Using NaSO<sub>2</sub>
CF<sub>3</sub>
作者:Jie Liu、Xiaochun Zhao、Lvqi Jiang、Wenbin Yi
DOI:10.1002/adsc.201800702
日期:2018.10.18
A sulfonic anhydride‐promoted direct trifluoromethylthiolation using NaSO2CF3 has been developed. The simple and practical strategy enabled the direct introduction of SCF3 moiety into unexplored arene scaffolds under reductant‐ and metal‐free condition at room temperature.