Abstract
The trifluoromethanide anion is the postulated key intermediate in nucleophilic trifluoromethylation reactions. It is believed to be incompatible with Na+ cation due to the strong Na–F bond. However, herein we demonstrate that it could be prepared for the first time. Trialkylamines can be used as cation chelating agents to stabilize the isolated –CF3 ion to realize trifluoromethylation reaction. With this strategy, trifluoromethyl aromatic ketones could be effectively synthesized from fluoroform and aromatic esters with diisopropyl aminosodium (NaDA) and trialkylamines.
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