Catalytic enantioselective trifluoromethylthiolation of oxindoles using shelf-stable N-(trifluoromethylthio)phthalimide and a cinchona alkaloid catalyst
The organocatalytic enantioselectivetrifluoromethylthiolation of oxindoles employing N-(trifluoromethylthio)phthalimide as a stable, easy to handle CF3S-source has been developed. Optically active products with a quaternary stereogenic center bearing a CF3S-group are obtained in good yields and with good to excellent enantioselectivities.
In Situ Generation of Electrophilic Trifluoromethylthio Reagents for Enantioselective Trifluoromethylthiolation of Oxindoles
作者:Xing-Li Zhu、Jin-Hui Xu、Dao-Juan Cheng、Li-Jiao Zhao、Xin-Yuan Liu、Bin Tan
DOI:10.1021/ol5006888
日期:2014.4.18
An organocatalytic asymmetric trifluoromethylthiolation reaction via in situ generation of active electrophilic trifluoromethylthio species involving trichloroisocyanuric acid and AgSCF3 as a practical and easily handled electrophilic SCF3 source for CSP3–SCF3 bond formation was developed. Reactions with this one-pot version strategy occurred in good yields and excellent stereoselectivities to access