Transition-Metal-Free Tandem Cyclization/<i>N</i>-Arylation Reaction: A Method To Access Biaryl Sultam Derivatives via a Diradical Pathway
作者:Vijaykumar H. Thorat、Jen-Chieh Hsieh、Chien-Hong Cheng
DOI:10.1021/acs.orglett.0c02393
日期:2020.8.21
This reaction goes through the intramolecular homolytic cyclization to generate an N–H biaryl sultam intermediate, which enables aryne insertion to access diversely functionalized biaryl sultam derivatives with high yields. The mechanism study indicates that homolytic cyclization is executed by a diradical species, initiated from the thermaldecomposition of 1,2,3,4-benzothiatriazine-1,1-dioxide to release
<i>S</i>
‐(Trifluoromethyl)Benzothioate (TFBT): A KF‐Based Reagent for Nucleophilic Trifluoromethylthiolation
作者:Depei Meng、Yichong Lyu、Chuanfa Ni、Min Zhou、Yang Li、Jinbo Hu
DOI:10.1002/chem.202104395
日期:2022.3
developed as an inexpensive, bench-stable and user-friendly trifluoromethylthiolation reagent. TFBT reagent can readily release SCF3− with various counterions. The synthetic application of TFBT is demonstrated by trifluoromethylthiolation-halogenation of arynes, bis(trifluoromethylthiolation)-halogenation of 1,2-benzdiynes, nucleophilic substitution of alkyl halides, deoxytrifluoromethylthiolation of alcohols