73515-08-9Relevant articles and documents
Fluorination Triggers Fluoroalkylation: Nucleophilic Perfluoro-tert-butylation with 1,1-Dibromo-2,2-bis(trifluoromethyl)ethylene (DBBF) and CsF
Dong, Hui,Hu, Jinbo,Ni, Chuanfa,Tao, Quan,Wang, Qian,Xie, Xiaoming
supporting information, p. 27318 - 27323 (2021/11/22)
Perfluoro-tert-butylation reaction has long remained a challenging task. We now report the use of 1,1-dibromo-2,2-bis(trifluoromethyl)ethylene (DBBF) as a practical reagent for perfluoro-tert-butylation reactions for the first time. Through a consecutive triple-fluorination process with DBBF and CsF, the (CF3)3C? species can be liberated and observed, which is able to serve as a robust nucleophilic perfluoro-tert-butylating agent for various electrophiles. The power of this synthetic protocol is evidenced by the efficient synthesis of structurally diverse perfluoro-tert-butylated molecules. Multiple applications demonstrate the practicability of this method, as well as the superiority of perfluoro-tert-butylated compounds as sensitive probes. The perfluoro-tert-butylated product was successfully applied in 1H- and 19F-magnetic resonance imaging (MRI) experiment with an ultra-low field (ULF) MRI system.
Azole derivatives
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Page/Page column 13, (2010/10/20)
Compounds of formula I their pharmaceutically acceptable salts, enantiomeric forms, diastereoisomers and racemates, are disclosed. Also disclosed are methods of preparation of the above-mentioned compounds, pharmaceutical compositions and salts and esters
Novel oxidized thioether derivatives
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Page/Page column 14, (2010/02/13)
The present invention provides the compounds of formula I their pharmaceutically acceptable salts or esters, enantiomeric forms, diastereoisomers and racemates, the preparation of the above-mentioned compounds, pharmaceutical compositions containing them